Hướng dẫn sử dụng EC20 series PLC

Hướng dẫn sử dụng

Copyright © 2005 by Emerson Network Power Co., Ltd

All rights reserved The contents in this document are subject to change without notice

Emerson Network Power Co., Ltd

Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China Homepage: www.emersonnetworkpower.com.cn

E-mail: support@emersonnetwork.com.cn

Safety Precautions

To reduce the chance of accident, please read the safety precautions very carefully before operation The

"Caution, Notice, Warning, Danger" symbols in this manual do not represent all the safety points to be observed, and are only used as a supplement to various operation safety points Therefore, the installation and operation personnel must be strictly trained and master the correct operations and all the safety points before actual operation

When operating Emerson PLC products, the safety rules in the industry, the general safety points and special safety instructions specified in this manual must be strictly observed

These notices are highlighted in the manual by a warning triangle and are marked as follows according to the level of danger:

Danger: indicates that death, severe personal injury, or substantial property damage will result if proper

precautions are not taken

Warning:indicates that death, severe personal injury, or substantial property damage could possibly result if proper precautions are not taken

Caution: indicates that minor personal injury or property damage can result if proper precautions are not taken

Notes for designing

The programming must include safety circuit to ensure the safe application of the PLC (Programmable Logic Controller) system upon power off or the PLC malfunction Note the following when programming:

z The external circuit of the PLC must include the emergency braking circuit, protection circuit, mutual interlock circuit of forward/reverse rotation, and the interlock switch of position upper/lower limit for

preventing equipment from damage

z For the safe operation of the equipment and output signals of the serious accident, please design the external protection circuit and the safety mechanism

z All the outputs may be shutdown when the CPU of the PLC detects the abnormity of the system; the failure

of part PLC circuit may result in uncontrolled PLC output A suitable external control circuit must be designed to ensure the normal operation of the equipment

z When the PLC output unit such as the relay or the transistor is damaged, the PLC output cannot be controlled as ON or OFF state

z The PLC is designed to be used in the electrical environment of indoor area B and C☆

However, to prevent the high lightning voltage from damaging the equipment through the ports of power input, signal input or control output, a SPD should be installed in the power supply system

☆: According to IEC61131-2, section 8.3.1 classification declaration

Notes for installation

z Units should not be installed in areas subject to the following conditions: excessive or conductive dust, corrosive or flammable gas, moisture or rain, excessive heat, regular impact shocks or excessive vibration Electric shock, fire hazard and mishandling may also damage the product

z Take special care not to allow metal debris and wire lead to fall inside the vent of the PLC during the screw hole processing and wiring Otherwise there is a danger of fire, damage or faulty operation of equipment

z Once the installation of the new PLC is complete, remove everything on the surface of the vent, including packing goods such as protective paper Otherwise the poor ventilation during the operation may result in fire, damage or faulty operation of equipment

z Do not wire, inset or pull out the cable plug with power applied Otherwise there is a danger of electric shock or circuit damage

z Installation and wiring must be fastening and reliable Bad contact may result in faulty operation of

equipment

z The input/output cable of high frequency signal should use the shielding cable to improve the interference rejection of the system

Notes for wiring

z Installation and wiring can be done only after the external power supplies are all disconnected Otherwise there is a danger of electric shock or equipment damage

z Once the installation and wiring of the PLC is complete, cleanup the spot at once To prevent the electric shock, replace the port cover of the product before power is on

z When wiring AC supplies, the ‘Live’ cable should be connected to the ‘L’ terminal and the ‘Neutral’ cable should be connected to the ‘N’ terminal Otherwise the PLC will be damaged

z Don’t power +24V port of the main module by the external power supply Otherwise the PLC will be damaged

z Do not lay I/O signal cables of the PLC next to other power cables or strong interference circuits

z Do not make the earth port (PG) of the main module and the heavy current power system share the same earthing

Notes for operation and maintenance

z Do not touch the ports when the power is applied, otherwise there is a danger of an electric shock or faulty operation of equipment

z The cleaning and the fastening work can be done only after the power supply has been disconnected; otherwise there is a danger of electric shock

z Only after the power supply has been disconnected, can the communication signal cables and the cables

of the expansion module or control unit be connected or removed Otherwise there is a danger of

equipment damage or faulty operation of equipment

z Do not disassemble the PLC Otherwise it may destroy the inner electrical components

z Read through this manual carefully before operating the PLC Safe and efficient operation of the product, such as program alternation, trial operation, start and stop, is only based on correct operation and

maintenance

z Do not replace the button cell battery with power applied If the battery replacement is indeed to be done with power applied, it shall always be carried out by adequately trained electric technical personnel wearing insulated gloves

Notes for the product disposal

Note the following when disposing the PLC:

z Explosive of the electrolytic capacity: The capacities on the circuit board may explode when burning

z Exhaust gas when burning: The main body of the PLC is plastic, and it may produce poisonous gas when burning

z Disposal of button cell battery: Classified collecting and disposing, and separating from the daily-life rubbish

Follow the local environmental regulations to dispose the PLC or dispose it as industrial waste

Contents

Chapter 1 Preface 1

Chapter 2 Product Introduction 2

2.1 Outline 2

2.2 Maximum Configuration 2

2.3 Internal Memory Capacity Of User Program 2

2.4 Resource Configuration Of System Soft-device 2

2.5 High-speed Input/Output Function 3

2.6 Filter Function Of Input Port 3

2.7 Interrupt Source 3

2.8 Subroutine Call 3

2.9 Reinforced Debugging Function 3

2.10 Support Online Modification 3

2.11 Multiple Password Protection Function 4

2.12 Expansion Module 4

2.13 RUN And STOP Control 4

2.14 User Program Developing And Debugging 4

2.15 Communication And Networking 4

Chapter 3 Installation 5

3.1 Notes For Installation 5

3.2 Requirements For Installation Position 5

3.3 Installation Method 5

3.4 Installation Dimensions 6

Chapter 4 Product Specifications 8

4.1 Model Legend 8

4.2 Product Model And Configuration 8

4.2.1 Main Module 8

4.2.2 I/O Expansion Module 8

4.2.3 Special Function Module 9

4.3 Product Size 9

4.4 Environmental Requirements 9

4.5 Electric Insulation Specifications 9

4.6 Reliability 10

4.7 Power Supply Specifications 10

4.7.1 Inner Power Supply Of Main Module 10

4.7.2 Use Of Each Circuit Output Power 10

4.7.3 Power Specifications Provided By Main Module To Expansion Module 11

4.7.4 Derating Design Of Power Supply Circuit 11

4.7.5 Power Consumption Of Expansion Module 12

4.7.6 Power Capacity Calculation In Expansion Connection 12

4.8 Programming Tool Of User Program 12

Chapter 5 Input Characteristic 13

5.1 User Ports Of Main Module 13

5.2 Input Port Characteristic And Signal Specification 14

5.3 Inner Equivalent Circuit Of Input Port 15

5.4 Input Connection Of High-speed Counter 16

5.5 Interrupt Input Connection 17

5.6 Input Signal Status Indication 17

5.7 Analog Potentiometer And Application 17

5.8 Example Of Input Connection 17

Chapter 6 Output Characteristic 19

6.1 Output Port Application 19

6.2 Electric Specifications Of Output Port 19

6.3 Output Port Connection 20

6.4 Output Port Status Indication 22

6.5 Example Of Output Connection 22

Chapter 7 Expansion Module 23

7.1 Model 23

7.2 Expansion Busbar Connection 23

7.3 Expansion Module Addressing 23

7.3.1 I/O Point Addressing Number Principle 24

7.3.2 Special Function Module Addressing Number Principle 24

Chapter 8 Communication And Networking 25

8.1 Communication Port 25

8.2 Programming Environment 26

8.3 Programming Cable 26

Chapter 9 Cable Specification And Wiring 27

9.1 Connecting Power Supply Cable 27

9.2 Connecting Ground Cable 27

9.3 Connecting Common Port 28

9.4 Cable Specification 28

Chapter 10 First Operation And Maintenance 29

10.1 Notes For Application 29

10.2 Check Before Power On 29

10.3 Startup 29

10.4 RUN/STOP Switchover 29

10.4.1 How To Startup (STOP → RUN) 30

10.4.2 How To Stop (RUN → STOP) 30

10.5 Routine Maintenance 30

Chapter 11 Troubleshooting 32

Chapter 12 Instruction List 33

Chapter 13 Special Register 38

13.1 Special Intermediate Register 38

13.2 Special Data Register 42

Chapter 1 Preface 1

Chapter 1 Preface

Thank you for using EC20 series Programmable Logic Controller (PLC) made by Emerson Network Power Co., Ltd This book contains text, diagrams and explanations that will guide the reader in the correct installation and operation

of the EC20 series PLC and should be read and understood before attempting to install or use the product

The book describes the hardware, features and applications of the EC20 series PLC, also includes the options introduction, troubleshooting guide and instruction quick reference For the information about how to setup an EC20

programming system and the customer programming application, please refer to ControlStar Programming Software

User Manual or EC20 series PLC Programming Manual printed by Emerson Network Power Co., Ltd For ordering

the above user manuals, contact your Emerson distributor or sales office

This manual is designed for the engineer who is studying, programming, installing, or servicing the EC20 series PLC

Definitions of specific terms

PLC: Programmable Logic Controller

Main module: Refer to basic module or CPU module; it is the basic unit of the PLC It includes master CPU, I/O ports and power supply

Expansion module: Generally refer to the modules except for the main module

I/O expansion module: The expansion module for the digital signal input/output

Special function module: Other function expansion modules except for the I/O expansion module, such as analog signal input/output module, and busbar module

Points: The sum of channel number of the input/output digital signal

Digital signal: Refer to the input/output signals that only have two states: “ON” and “OFF”

Analog signal: Continuously changed electric signal, such as 4~20mA output signal of pressure transmitter

Unipolar signal: Generally refer to the continuously changed signal with positive polarity

Bipolar signal: Generally refer to the continuously changed signal, which may be positive polarity or negative polarity

High-speed pulse: Refer to the square-wave signal with higher frequency

Counter: Refer to the counter whose counting value increases or decreases by per pulse input according to the increasing/decreasing control signal

Two-phase counter: refer to the counter that has two-pulse input ports, one is for counting up, and the other is for counting down

AB-phase counter: refer to the counter that has two input ports of quadrature phase pulse, and counts up or down according to the frequencies and phase differences of the two signals

2 Chapter 2 Product Introduction

Chapter 2 Product Introduction

2.1 Outline

The outline of EC20 main module is shown in Figure 2-1

5 6 7 8 9

10 11

12

13 14 15

Figure 2-1 Outline of EC20 main module

The name and function of the components in the figure are as follows:

1 The installation position of a button cell battery (CR2032 lithium battery) for data backup

2 Power supply input ports

3 Signal input ports

4 Input signal status LEDs

5 26pin busbar socket, used for connecting the expansion module

6 Output signal status LEDs

7 Fix screws, used for tightening the top/bottom cover of the PLC

8 Mounting holes, used for installing screws

9 Locking device of 35mm DIN, used for DIN rail installation mode

10 Signal output ports

11 System operation status LEDs

12 Communication port COM1, providing RS485 and RS232 at the same time

13 Communication port COM0, RS232, Mini DIN8 socket

14 System operation control switch, with three positions: ON, TM and OFF

15 Analog potentiometers (two)

2.2 Maximum Configuration

The main module and the I/O expansion modules can achieve the most 512 logic points (256 in/256 out maximum) And eight special function modules can be expanded at most

2.3 Internal Memory Capacity Of User Program

The user program is 8K words (16K byte) at most and supports 8,000 data blocks of D register

2.4 Resource Configuration Of System Soft-device

X Input relay 256 X000~X377 The soft-device numbering is octal code

Y Output relay 256 Y000~Y377 The soft-device numbering is octal code

Chapter 2 Product Introduction 3

SM Special auxiliary relay 256 SM0~SM255

100ms precision: T0~T209 10ms precision: T210~T251 1ms precision: T252~T255

16 bit common increasing counter: C0~C199

32 bit common decreasing counter: C200~C235

32 bit high-speed counter: C236~C255

V Local data register 64 V0~V63

Z Indexed addressing

SD Special data register 256 SD0~SD255

2.5 High-speed Input/Output Function

High-speed port

name High-speed port type Input/output mode Max frequency of input/output signal

X0, X1 Input High-speed pulse count Single input: 50KHz;

X0~X5 input at the same time: frequency sum is 80KHz X2~X5 Input High-speed pulse count Single input: 10KHz

Y0, Y1 (only suitable

for transistor output) Output High-speed pulse output Two ports output independently: 100KHz

2.6 Filter Function Of Input Port

Digital filter function X0~X17 provide digital filter function, and filter time is within 0~60mS, set by user’s program

Hardware filter function Other X input ports

2.9 Reinforced Debugging Function

Provide register-forced function, convenient for debugging and analyzing the user program, improving debugging efficient Permit the most 128 bit-registers and 16 word-registers

2.10 Support Online Modification

Users can modify the program online during operation, which is greatly convenient for modifying and upgrading the user program in important production situation

4 Chapter 2 Product Introduction

2.11 Multiple Password Protection Function

The product provides three password authorities, which is convenient for user program access control and protecting the intelligence property

2.12 Expansion Module

The expansion module such as I/O module, analog signal input/output module, network expansion module, and position control module can be connected to the PLC main module Every module is address allocation automatically and identification automatically

2.13 RUN And STOP Control

RUN or STOP of the EC20 can be controlled through the following methods: the RUN/STOP switch, ControlStar program system, communication port (i.e Modbus), and standard input ports X0~X7, which are convenient for controlling system operation

2.14 User Program Developing And Debugging

Provide the integrated ControlStar program system compatible with IEC61131-3 standard, and uses ladder diagram, instruction list, and sequential function diagram to program The unit has such functions as monitoring, debugging, and modifying on-line The program system also provides strong instruction guide and on-line help

2.15 Communication And Networking

The main module has two asynchronism serial communication ports (COM1 provides RS232 and RS485 level), for communication with personnel computer, HMI and other equipment; and the main module has an inner standard Modbus protocol to compose 1:N network; and supports freedom protocol

Provide Profibus module to compose the Profibus network

Chapter 3 Installation 5

Chapter 3 Installation

3.1 Notes For Installation

The PLC is designed to be used in the environments meeting with standard II installation ambient, and Class 2 pollution So the unit should be installed in such environment free of dust, conductive dust, corrosive or flammable gas, excessive heat, moisture or rain; Besides, shocks and vibrations will also affect the reliability of the PLC and shorten its service life, and should therefore be avoided

Usually, the user should mount the PLC and the associated switches, contactors to the inside wall of the electric cabinet and keep adequate natural convection If the ambient temperature is a little high, or a heat generating

equipment is nearby, then a forced convection device should be installed on the top or the side of the cabinet to prevent the overheat of the unit

Take special care not to allow metal debris and wire lead to fall inside the vent of the PLC during the screw hole processing and wiring Otherwise there is a danger of fire, damage or faulty operation of equipment

Once the installation of the new PLC is complete, remove everything on the surface of the vent, including packing goods such as protective paper Otherwise the poor ventilation during the operation may result in fire, damage or faulty operation of equipment

Do not wire, inset or pull out the cable plug with power applied Otherwise there is a danger of electric shock or circuit damage

Installation and wiring must be firm and reliable; bad contact may result in faulty operation of equipment

3.2 Requirements For Installation Position

To prevent a rise in temperature, mount the PLC up and down to the backboard of thecabinet horizontally Never mount them to the floor or ceiling of an enclosure or other directions, as shown in the Figure 3-1 You must provide a clearance of at least 15 mm, both above and below the units, for proper cooling No heat generating equipmentshould exist around the PLC

Figure 3-1 Requirements for installation position

3.3 Installation Method

Generally you can mount the PLC onto a standard rail (DIN) with 35mm width Follow these steps:

1 Fix the DIN rail to the backboard;

2 Pull out the clip (located on the bottom of the PLC) and hook the back of the PLC onto the rail

3 Snap the clip closed, carefully checking to ensure that the clip has fastened the PLC securely onto the rail

4 At last, install two DIN rail stops at the two sides of the PLC to avoid slippage around

Other EC20 series modules can be mounted using the same procedures

Figure 3-2 Installing a PLC onto a standard rail

Under the conditions with great impact, you should mount the PLC on a panel using the screw installation Using four fix screws through the four Φ4 mounting holes on the enclosure of the PLC (while EC20-2012BR/BT has only two Φ4 fix screws) to fix the PLC on the back panel of the electric cabinet, as shown in the Figure 3-3

Figure 3-4 Dimensions of outline and mounting holes of EC20-2012BR and EC20-2012BT

2 The dimensions for the outline and mounting holes of EC20-3232BR and EC20-3232BT are shown in the Figure 3-5:

Figure 3-5 Dimensions of outline and mounting holes of EC20-3232BR and EC20-3232BT

3 The dimensions for the outline and mounting holes of EC20-0808ER are shown in the Figure 3-6 And the

dimensions for the outline and mounting holes of the analog signal expansion module such as EC20-4AD, EC20-4DA, EC20-4AM, and EC20-4TC are the same with that of EC20-0808ER

Chapter 3 Installation 7

Figure 3-6 Dimensions of outline and mounting holes of EC20-0808ER and the analog signal expansion module

8 Chapter 4 Product Specifications

Chapter 4 Product Specifications

Input pointsVersionSeries No (1:micro-type; 2:minitype; 3:medium-sized; 4:large-sizedEmerson PLC

Figure 4-1 Model Legend of PLC

4.2 Product Model And Configuration

4.2.1 Main Module

Table 4-1 Model and I/O configuration of EC20 series PLC,

Model Power voltage

Vac

Input / output points

Input signal voltage

Output type

☆ “ 32/1(2)” in the table: Represent only one common port in logic, but two common ports in structure, and the two

are connected inside the PLC

4.2.2 I/O Expansion Module

Table 4-2 I/O expansion module and configuration of EC20 series PLC

Model Power Supply Vac Input/output points Output type Inner power supply

Chapter 4 Product Specifications 9 4.2.3 Special Function Module

Table 4-3 Special function module of EC20 series

EC20-4AD 4-channel analog signal input module EC20-4DA 4-channel analog signal output module EC20-4TC 4-channel thermocouple temperature input module EC20-4AM 2-channel analog signal input module, 2-channel analog signal output module

4.3 Product Size

The main modules of EC20 series PLC have the same height and width, but their lengths are related to the I/O ports

The size of each module is listed in Table 4-4

Table 4-4 Product size

Model Length (mm) Width (mm) Height (mm) Net weight

Environmental conditions for operation

Environmental conditions for transport

Environmental conditions for storage

Temperature

Humidity Relative humidity % 95 (30 ± 2°C) 95 (40 ± 2°C) /

Impact

4.5 Electric Insulation Specifications

Table 4-6 Electric insulation specifications of EC20 series PLC

AC input to DC output ≥ 5%10 6 Ω Insulation

resistance

Ambient temperature: 25 ± 5°C; relative humidity 90% (no condensing); test voltage: 500Vdc

AC input to case (PG port)

AC input to the port between the user input and output

AC input to expansion busbar User output (relay board) to expansion busbar User input to user output (relay)

Insulation

voltage

Between user output ports (relay board)

Capable of withstanding 2830Vac/50Hz AC voltage (or equivalent DC voltage) 1 minute, with leakage current ñ30mA, and no breakdown or flashover

10 Chapter 4 Product Specifications

Table 4-7 MTBF of EC20 series PLC

200,000 hours Fix on the floor , mechanical stress is almost close to zero, with temperature and humidity control Relay

100,000 hours Fix on the floor , mechanical stress is almost close to zero, without temperature and humidity control 300,000 hours Fix on the floor , mechanical stress is almost close to zero, with temperature and humidity control Transistor

150,000 hours Fix on the floor , mechanical stress is almost close to zero, without temperature and humidity controlFor the PLC with relay output, the life of its contactors is related to the load type and load capacity, as listed in Table 4-8

Table 4-8 Use life of EC20 series output relay

Load capacity Action frequency Life-span of contactors 220Vac, 15VA, inductive load 1sec ON / 1sec OFF 3,200,000 times

220Vac, 30VA, inductive load 1sec ON / 1sec OFF 1,200,000 times

220Vac, 60VA, inductive load 1sec ON / 1sec OFF 300,000 times

4.7 Power Supply Specifications

4.7.1 Inner Power Supply Of Main Module

Table 4-9 Power supply circuit character of EC20 series PLCs

Input voltage Vac 90 220 264 Normal start and operating range

Limiting input voltage Vac 85 - 280

Operating at 280V for 3 hours and not damaged Each circuit can power 70% rated load at 85-100Vac, and power 55% rated load at 264-280Vac

Input current A / / 1.5 90Vac input, full load output

24V/GND V 21.6 24 26.4 Output2 Output

4.7.2 Use Of Each Circuit Output Power

1 Output1 (5V/GND): Output1 is the working power of the PLC main module logic circuit, and provides power supply

to the expansion module logic circuit through the expansion port of the module at the same time And this power will not be used for the expansion module with self-carried power source

2 Output2 (24V/GND): Output2 is the working power of the PLC main module relay output circuit, and provides power supply to the expansion module relay output circuit through the expansion port of the module at the same time Output1 and output2 share the common ground And this power will not be used for the expansion module with self-carried power source

3 Output3 (24V/COM): Output3 is the 24V power supply, which is provided to users by the PLC main module Also it can be used as an auxiliary power to other user circuits, sensors or expansion modules through the “24V” and “COM” ports of the main module Output3 is electrical isolated with Output1 and Output2

Chapter 4 Product Specifications 11 4.7.3 Power Specifications Provided By Main Module To Expansion Module

Table 4-10 Power capacity consumption and load current provided

Logic circuit power supply Auxiliary power supply output

Model

Inner consumption*

Capacity provided*

Inner consumption

Capacity provided Inner consumption Capacity provided EC20-2012BR 250mA 750 mA 70 mA 580 mA

EC20-3232BR 480 mA 520 mA 240 mA 410 mA

*Explanation:

The current of “Inner consumption” in Table 4-10 is the average current consumed when the module inner circuit

works Users cannot change it directly

The current of “capacity provided” in Table 4-10 is the part capacity of the main module that can be used for the

external control module The data listed in Table 4-10 is under the stable ambient condition with 25°C If input voltage

is out of rated voltage range or the working temperature exceeds +50°C, users should consider the derating design,

which is mainly obtained by decreasing the value of “capacity provided”, to ensure the reliable operation of the PLC

4.7.4 Derating Design Of Power Supply Circuit

1 Relation between power supply output capacity derating and power supply input voltage

When the input voltage of the PLC is beyond the rated voltage range, users should consider decreasing the main

module’s output power to the expansion module The derating relation is shown in Figure 4-2

Power load %

Input voltage Vac

85 Vac 100 Vac

264 Vac 280 Vac

Figure 4-2 Derating curves of power supply output capacity and power supply input voltage

2 Power output capacity derating vs work temperature relationship

When the work temperature is higher than the upper limit of the specification, the power capacity provided (including

5V/24V/GND and 24V/COM) by the main module to the expansion module must be derating The derating relation is

shown in Figure 4-3

Power load %

Operation ambient temperature °C

Figure 4-3 Derating curve between power output capacity and work temperature

12 Chapter 4 Product Specifications

4.7.5 Power Consumption Of Expansion Module

Table 4-11 Power consumption of each expansion module

Max current consumption Model

☆: Refer to the power consumption when the analog output channel port connects with the output If the current

output port (0~20mA) is not used, the current can be decreased to 50mA

4.7.6 Power Capacity Calculation In Expansion Connection

Before the PLC connects with an expansion module, users should calculate the current sum of each power supply of

the expansion module, and ensure the current sum is less than the output current provided by the corresponding

power supply of the main module to avoids the over loading of the main module power supply

Example 1: the main module is EC20-2012BR, at 25°C ambient temperature, two EC20-0808ET, two EC20-4AD,

one EC20-4DA and one EC20-4TC shall be connected to, verifying the feasibility

Checking computations as following:

Power circuit Current provided by the main module Actual consumed current conclusion

It is obvious that the total power consumption of above expansion module is less than the permission load of the main

module, and the designing scheme is feasible

Example 2: the main module is EC20-3232BT, at 25°C ambient temperature, three EC20-0808ET, two EC20-4AD,

one EC20-4DA shall be connected to, using 20mA output port and one EC20-4TC

Checking computations as following:

Power circuit Current provided by the main module Actual consumed current conclusion

The sum of the 5V/GND power consumption of the expansion module is 440mA, it is larger than 350mA which is the

upper limit of 5V power supply; although the power consumption of 24V/GND and 24V/COM is less than the

permitted current of the main module, the designing scheme is unfeasible

The solution to solve the insufficient of power supply capacity is to select the expansion module with self-carried

power source It can power by itself, also its outputs of 5Vdc/GND, 24Vdc/GND, and 24Vdc/COM can power to the

expansion module added later

4.8 Programming Tool Of User Program

ControlStar programming system provides the programming, up/down-loading, debugging and monitoring the user

program of the EC20 series PLC The system also provides abundant help information, which can use ladder

diagram, instruction list and sequence functional diagram to program

Chapter 5 Input Characteristic 13

Chapter 5 Input Characteristic

5.1 User Ports Of Main Module

The outline and the ports of EC20-2012BR and EC20-2012BT are the same Their port wirings are shown in Figure 5-1:

0

COM 1

COM

2 Y3

COM 3

COM 4

Figure 5-1 The outline and the port of EC20-2012BR and EC20-2012BT

The pin definitions of EC20-2012BR and EC20-2012BT are listed in Table 5-1:

Table 5-1 Pin functions of EC20-2012BR and EC20-2012BT

L/N 220Vac AC power input port, L is live line, N is neutral line

● Null port, used for isolation and not wiring

X0~X23 User input signal ports, used together with COM can produce input signal

COM Common port, it is the negative pole of the +24Vdc auxiliary power and the

common port of input as well Two COMs connect inside the PLC +24V The auxiliary power to user external equipment , used together with COM

Y0, COM0 Control output port, group 0

Y1, COM1 Control output port, group 1

Y2, Y3, COM2 Control output port, group 2

Y4~Y7, COM3 Control output port, group 3

Y10~Y13, COM4 Control output port, group 4

The COMx (COM0 ~ COM4) of each output group are electrical isolated one another

The outline, port layout and function definition of EC20-3232BR and EC20-3232BT are the same The port layout is shown in Figure 5-2:

14 Chapter 5 Input Characteristic

X25 X27 X31

X26 X30 X32 X34 X36

X35

Wiring of EC20-3232BR and EC20-3232BT

Y0 COM2 Y5 Y7 Y11 Y13 Y15 Y17 Y21

Y6 COM Y12 Y14 Y16 Y20 Y22 3

Y25

Y23 Y3

Y26 Y30 Y32

Y27 Y31 Y33 Y35 Y37

Y36

Y1 COM

0 COM1 Y2 Y4 Y10

COM

Figure 5-2 Outline and port layout of EC20-3232BR and EC20-3232BT

Table 5-2 Pin definition

L/N 220Vac AC power input port, L is live line, N is neutral line

● Null port, used for isolation and not wiring

X0~X37 User input signal ports, used together with COM can produce input signal

COM Common port, it is the negative pole of the +24Vdc auxiliary power and the

common port of input as well Two COMs connect inside the PLC

+24V The auxiliary power to user external equipment , used together with COM

Y0, COM0 Control output port, group 0

Y1, COM1 Control output port, group 1

Y2~Y7, COM2 Control output port, group 2

Y10~Y17, COM3 Control output port, group 3

Y20~Y27, COM4 Control output port, group 4

Y30~Y37, COM5 Control output port, group 5

The COMx (COM0~COM4) of each output group are electrical isolated one aother

5.2 Input Port Characteristic And Signal Specification

Table 5-3 Input port characteristic and signal specification

Signal input mode Leak mode, users only need to connect dry contact with Xn and COM ports

parameters Input OFF External circuit resistance > 24kΩ

Digital filter X0~X17 have digital filtering function, the filtering time can be set within 0~60ms Filtering

function Hardware filter Except for X0~X17, other I/O ports are hardware filtering, filtering time is about 8mS High-speed function

X0~X7 have high-speed counting, interrupt, and pulse catching function

The highest counting frequency of X0 and X1 port is high up to 50KHz The highest counting frequency of X2~X5 port is high up to 10KHz Input Only has one common port: COM

Common port

Output Have multi isolated common ports according to different point configuration

Chapter 5 Input Characteristic 15 5.3 Inner Equivalent Circuit Of Input Port

There is a user switch status detecting power supply (24Vdc) Users only need to connect to the switching signal of the dry contact If the output signal of active transistor sensor is connected to, an OC output signal is needed Figure 5-3 shows the signal input and inner equivalent circuit of the PLC, and user’s circuit connects with PLC inner circuit through the connecting port

24Vdc auxiliary power supply

Figure 5-3 Inner equivalent input circuit of the main module (upon delivery)

As shown in Figure 5-3, the external signal input is “a SINK input” You may need “a SOURCE input” in some special application, and you can change the soldering of the three jumper terminals of JP0, JP1, and jp2 on the interface board inside the PLC to reset the input mode, according to the screen-printing on the board (“ ” represents soldering;

“×”represents disconnection) As shown in Table 5-4:

Table 5-4 Screen print illustration

JP0 JP1 JP2

Drain input mode (default setting) % The equivalent input circuit changed to the SOURCE input mode is as Figure 5-4:

16 Chapter 5 Input Characteristic

Note: in the main module, all the input ports can but use the same input mode (SOURCE input mode or SINK input mode); if you have any requirement, please contact your supplier and ask for the technical support before purchasing the product To avoid damage, you’d better not change the circuit by yourself

The inner equivalent power supply and input signal connection of the I/O expansion module are shown in Figure 5-5:

User signal wiring Internal equivalent circuit of the

PLC extension module Power supply of logiccircuit : 24V/5V/GND

24V+

Figure 5-5 Inner equivalent input circuit of the I/O expansion module

5.4 Input Connection Of High-speed Counter

Table 5-5 the counter connection method and characteristic realized by X0~X7

Counter Input point

Counter C242 Up/down Reset

Counter C247 Up Down Reset

Counter C252 Phase A Phase B Reset

Phase A: phase-A input port of the two-phase counter;

Phase B: phase-B input port of the two-phase counter

Chapter 5 Input Characteristic 17

5.5 Interrupt Input Connection

For the system that responds promptly to the input signal, it can use the interrupt to process the signals The input ports of X0~X7 have interrupt function and corresponds to the eight external interrupt sources

If the input port is used as interrupt process mode, the corresponding interrupt control identification should be

enabled when programming and the corresponding interrupt routine should be programmed (for details, refer to

Programming Reference Manual) When using interrupt, the digital filter function of corresponding X port will be disabled and the filter time of the corresponding port is set as zero automatically

z When used as high-speed count input or interrupt input, the corresponding input port should use shielding wire, and the shielding wire should connect to earth line (same as PG port) to improve the interference rejection

z Some counters require multiple X input ports to realize (for example, C242, C244, and C254 consist of 2, 3, 4 ports separately) After using this kind of counter, the used ports cannot be used as input of other counters and the common input mode

z The input port of the counter has the limitation for the maximum frequency Beyond the limitation, it may result the incorrect counting or normal operation of the system You should use the input port reasonable and select the suitable external sensors

5.6 Input Signal Status Indication

The input status LEDs indicate the status of the user input port When the input port is closed (“ON” state), the LED is on; otherwise the LED is off When the X0~X7 ports input high frequency signal, the flashing frequency of the LED may be lower than that of the actual input signal, which is for the convenience of the user to observe the

characteristics of the port signals

Output terminal status LEDs

Figure 5-6 Status LEDs of EC20 series main module

5.7 Analog Potentiometer And Application

The analog potentiometer provides external channel for users setting inner soft-device, which is within 0~255 and read by user program

When adjusting the setting value, users can use a small Philips screwdriver to rotate the potentiometer clockwise to increase the setting value, and counter clockwise to decrease it The maximum angle of rotation is 270° Do not energize excess

5.8 Example Of Input Connection

Figure 5-7 shows an example: an EC20-3232BT connects with an EC20-0808ER to realize a simple position control The high-speed counting ports of X0 and X1 detect the position signal from the encoder The high-speed ports of X3~X7 connect to the travel switch which needs quickly response, other user signals can be distributed with input ports

18 Chapter 5 Input Characteristic

AC-LAC-N

X0 X1

+24V +5V GND

Xm Xn 24V X3

Using terminal block connects to COM

Figure 5-7 electric connection of EC20-3232BT and EC20-0808ER

Chapter 6 Output Characteristic 19

Chapter 6 Output Characteristic

6.1 Output Port Application

1 The output type of EC20 series PLC can be divided into relay type and transistor type Both types are greatly different in the operation parameters You should distinguish the difference before using them to avoid the damage by the misuse

2 To protect the contacts of the PLC output relay, when the drive DC circuit is inductive (such as relay coil), a

fly-wheel diode shall be connected to the user circuit; when the drive AC circuit is inductive, a RC surge absorber shall parallel connect to the user circuit In principle, the relay output port does not connect to the capacitive load If there is necessary to use, its surge current must be less than the maximum current in the specification list (see Table 6-1)

3 The transistor output port should be within the limitation of the allowable maximum current (see Table 6-1) to ensure the thermal value of the output port is limited in the allowable range If output currents of multiple transistors are bigger than 100mA, they should be distributed equally in the output ports Distributed adjacent will affect the heat dissipation

4 It is recommended the output points which are in the ON (conducting) state at one time shall not exceed 60% total output points for a long time

Table 6-1 Comparison of relay output and transistor output

as: intermediate relay, contactor coil, and LEDs

To apply in the situation with high frequency and long life, such as control servoamplifier and electromagnet with frequent action

6.2 Electric Specifications Of Output Port

Table 6-2 Electric specifications of output port

Output current

Single point: 2.0A /250Vac The total current of the 8 points sharing COM port is less than 8A

0.5A 24Vdc The total current of the 8 points sharing COM port is less than 2A

Leakage current at open