Chapter 3 PREPARATION AND TEST RUN
3.3 Mounting and Wiring the Inverter
3.3.3.8 Detailed functions of control circuit terminals
In general, the covers of the control signal wires are not specifically designed to withstand a high voltage (i.e., reinforced insulation is not applied). Therefore, if a control signal wire comes into direct contact with a live conductor of the main circuit, the insulation of the cover might break down, which would expose the signal wire to a high voltage of the main circuit. Make sure that the control signal wires will not come into contact with live conductors of the main circuit.
Failure to observe these precautions could cause electric shock or an accident.
Noise may be emitted from the inverter, motor and wires. Take appropriate measures to prevent the nearby sensors and devices from malfunctioning due to such noise.
It takes a maximum of 5 seconds to establish the input/output of the control circuit after the main power is turned ON. Take appropriate measures, such as external timers.
An accident could occur.
Table 3.3-8 lists the symbols, names and functions of the control circuit terminals. The wiring to the control circuit terminals differs depending upon the setting of the function codes, which reflects the use of the inverter. Route wires properly to reduce the influence of noise.
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals
Classifi- cation
Symbol Name Functions
[13] Power supply for the potentiometer
Power supply (+10 VDC) for an external speed command potentiometer.
(Variable resistor: 1 to 5kΩ)
The potentiometer of 1/2 W rating or more should be connected.
[12] Analog setting
voltage input (1) The speed is commanded according to the external voltage input.
• 0 to ±10 VDC/0 to maximum speed (2) Hardware specifications
• Input impedance: 10kΩ
• The maximum input is ±15 VDC, however, the voltage higher than ±10 VDC is regarded as ±10 VDC.
[Ai1]
[Ai2]
Analog input 1 Analog input 2
(1) Analog input voltage from external equipment.
Possible to assign various signal functions (Input signal off, Auxiliary speed setting 1, Torque limiter (level 1, etc.), selected with Function codes E49 and E50 to these terminals. For details, refer to Chapter 4, Section 4.2 "Function Codes."
(2) Hardware specifications
Only for terminal [Ai2], the input is switchable between voltage and current with the SW3 configuration. (For details about slide switches, refer to Section 3.3.3.9.)
To use terminal [Ai2] for current input speed setting (N-REFC), turn SW3 to the I position, set F01 or C25 to "9" and set E50 to "26." After that, check that the current input is normal on the I./O check screen (given in Section 3.4.4.5).
Voltage input
• Input impedance: 10kΩ
• The maximum input is ±15 VDC, however, the voltage higher than ±10
Analog input
3.3 Mounting and Wiring the Inverter
Chap. 3 PREPARATION AND TEST RUN
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi- cation
Symbol Name Functions
- Since low level analog signals are handled, these signals are especially susceptible to the external noise effects. Route the wiring as short as possible (within 20 m) and use shielded wires. In principle, ground the shielded sheath of wires; if effects of external inductive noises are considerable, connection to terminal [11] may be effective. As shown in Figures 3.3-9 and 3.3-10, be sure to ground the single end of the shield to enhance the shield effect.
- Use a twin-contact relay for low level signals if the relay is used in the control circuit. Do not connect the relay's contact to terminal [11] or [M].
- When the inverter is connected to an external device outputting the analog signal, the external device may malfunction due to electric noise generated by the inverter. If this happens, according to the circumstances, connect a ferrite core (a toroidal core or equivalent) to the device outputting the analog signal or connect a capacitor having the good cut-off characteristics for high frequency between control signal wires as shown in Figures 3.3-9 and 3.3-10.
- Do not apply a voltage of +7.5 VDC or higher to terminal [C1]. Doing so could damage the internal control circuit.
Figure 3.3-9 Connection of Shielded Wire Figure 3.3-10 Example of Electric Noise Reduction [FWD] Run forward
command (1) When terminals [FWD] and [CM] are closed, the motor runs in the forward direction;
when they are opened, the motor decelerates to a stop.
(2) Input mode, i.e. SINK/SOURCE, is changeable by using the slide switch SW1. (Refer to Section 3.3.3.9 "Setting up the slide switches."
[REV] Run reverse
command (1) When terminals [REV] and [CM] are closed, the motor runs in the reverse direction;
when they are opened, the motor decelerates to a stop.
(2) Input mode, i.e. SINK/SOURCE, is changeable by using the slide switch SW1. (Refer to Section 3.3.3.9 "Setting up the slide switches."
[X1] Digital input 1 [X2] Digital input 2 [X3] Digital input 3 [X4] Digital input 4 [X5] Digital input 5 [X6] Digital input 6 [X7] Digital input 7 [X8] Digital input 8
Digital input
[X9] Digital input 9
(1) Various signals such as "Coast to a stop," "Enable external alarm trip," and "Select multistep speed" can be assigned to these terminals by setting Function codes E01 to E09. For details, refer to Chapter 4, Section 4.2 "Function Codes."
(2) Input mode, i.e. SINK/SOURCE, is changeable by using the slide switch SW1. (Refer to Section 3.3.3.9 "Setting up the slide switches."
(3) Switches the logic value (1/0) for ON/OFF of the terminals [X1] to [X9]. If the logic value for ON of the terminal [X1] is 1 in the normal logic system, for example, OFF is 1 in the negative logic system and vice versa.
(Digital input circuit specifications)
Figure 3.3-11 Digital Input Circuit
Item Min. Max.
ON level 0 V 2 V Operating voltage
(SINK) OFF level 22 V 27 V ON level 22 V 27 V Operating voltage
(SOURCE) OFF level 0 V 2 V Operating current at ON
(Input voltage is at 0 V) − 4.5 mA Allowable leakage current at
OFF − 0.5 mA
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi- cation
Symbol Name Functions
[EN1]
[EN2]
Enable input (1) When [EN1]-[PS] or [EN2]-[PS] is opened (OFF), the inverter output transistor stops its operation. (Safe Torque Off, STO)
To enable the STO function, remove the jumper bars.
(2) The input mode of terminals [EN1] and [EN2] is fixed at SOURCE. It cannot be switched to SINK.
(3) When not using the Enable input function, short the circuit between [EN1]-[PS] and [EN2]-[PS] with jumper bars (that is, keep the short bars connected).
(Terminal EN circuit specification)
PS
Photocoupler
CM
<Control circuit>
6.6kW
+24 VDC
EN1
6.6kW EN2 Jumper bar
[PS] [EN] terminal
power Power terminal for terminals [EN1] and [EN2].
This terminal outputs +24 VDC (Reference for terminal [CM]).
[PLC] PLC signal
power (1) Connects to PLC output signal power supply.
Rated voltage: +24 VDC (Allowable range: +22 to +27 VDC), Maximum 100 mA DC (2) This terminal also supplies a power to the load connected to the transistor output
terminals. Refer to "Transistor output" described later in this table for more.
[CM] Digital input
common Two common terminals for digital input signals
Electrically isolated from terminals [11], [M], and [CMY].
Using a relay contact to turn [FWD], [REV], or [X1] to [X9] ON or OFF
Figure 3.3-12 shows two examples of a circuit configuration that uses a relay contact to turn control signal input [X1] to [X9], [FWD], or [REV] ON or OFF. In circuit (a), the slide switch is turned to SINK, whereas in circuit (b) it is turned to SOURCE.
Note: To configure this kind of circuit, use a highly reliable relay.
(Recommended product: Fuji control relay Model HH54PW.)
[PLC]
Photocoupler [CM]
<Control circuit>
[X1] to [X9], [FWD], [REV]
+24 VDC
SOURCE
SINK [PLC]
Photocoupler [CM]
<Control circuit>
[X1] to [X9], [FWD], [REV]
+24 VDC
SOURCE SINK
Digital input
Item Min. Max.
ON level 22 V 27 V Operating voltage
(SOURCE) OFF level 0 V 2 V Operating current at ON
(Input voltage is at 0 V) − 4.5 mA Allowable leakage current at
OFF − 0.5 mA
3.3 Mounting and Wiring the Inverter
Chap. 3 PREPARATION AND TEST RUN
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi- cation
Symbol Name Functions
Using a programmable logic controller (PLC) to turn [FWD], [REV], or [X1] to [X9] ON or OFF Figure 3.3-13 shows two examples of a circuit configuration that uses a programmable logic controller (PLC) to turn control signal input [X1] to [X9], [FWD], or [REV] ON or OFF. In circuit (a), the slide switch is turned to SINK, whereas in circuit (b) it is turned to SOURCE.
In circuit (a) below, short-circuiting or opening the transistor's open collector circuit in the PLC using an external power supply turns ON or OFF control signal [FWD], [REV], or [X1] to [X9]. When using this type of circuit, observe the following:
- Connect the + node of the external power supply (which should be isolated from the PLC's power) to terminal [PLC] of the inverter.
- Do not connect terminal [CM] of the inverter to the common terminal of the PLC.
[PLC]
Photocoupler [CM]
<Control circuit>
[X1] to [X9], [FWD], [REV]
+24 VDC
Programmable logic controller
SOURCE
SINK [PLC]
Photocoupler [CM]
<Control circuit>
[X1] to [X9], [FWD], [REV]
+24 VDC
Programmable logic controller
SOURCE SINK
(a) With the switch turned to SINK (b) With the switch turned to SOURCE
Digital input
Figure 3.3-13 Circuit Configuration Using a PLC
For details about the slide switch setting, refer to Section 3.3.3.9 "Setting up the slide switches."
[Ao1] Analog output 1 [Ao2] Analog
output 2 [Ao3] Analog
output 3
(1) Output of monitor signals with analog voltage 0 to ±10 VDC.
Various signals such as "Detected speed," "Speed setting," and "Torque current command" can be assigned to these terminals by setting Function codes E67 to E71.
For details, refer to Chapter 4, Section 4.2 "Function Codes."
(2) Hardware specifications
• Connectable impedance: Min. 3kΩ
• Gain adjustment range: 0.00 to ±100.00 times
Note: For these terminals, select devices having input terminals with a small capacitive load. Large capacitive load may cause the output to oscillate.
Analog output
[M] Analog
common Common for analog output signals ([Ao1], [Ao2] and [Ao3]).
Electrically isolated from terminals [CM], [CMY] and [PGM].
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi- cation
Symbol Name Functions
(1) Various signals such as "Inverter running," "Speed valid," and "Speed agreement" can be assigned to these terminals by setting Function codes E15 to E18. For details, refer to Chapter 4, Section 4.2 "Function Codes."
(2) Switches the logic value (1/0) for ON/OFF of the terminals between [Y1] to [Y4], and [CMY]. If the logic value for ON between [Y1] to [Y4] and [CMY] is 1 in the normal logic system, for example, OFF is 1 in the negative logic system and vice versa.
(Transistor output circuit specification)
Photocoupler
<Control circuit>
[Y1]
to [Y4]
[CMY]
31 to 35 V
Voltage
Current
Figure 3.3-14 Transistor Output Circuit
Item Max.
ON level 2 V Operation
voltage OFF level 27 V Maximum current at ON 50 mA Leakage current at OFF 0.1 mA [Y1]
[Y2]
[Y3]
[Y4]
Transistor output 1 Transistor output 2 Transistor output 3 Transistor output 4
- When a transistor output drives a control relay, connect a surge-absorbing diode across relay’s coil terminals.
- When any equipment or device connected to the transistor output needs to be supplied with DC power, feed the power (+24 VDC: allowable range: +22 to +27 VDC, 100 mA max.) through the [PLC] terminal. Short-circuit between the terminals [CMY] and [CM] in this case.
[CMY] Transistor output common
Common terminal for transistor output signals
Electrically isolated from terminals [CM], [11], [M], and [PGM].
Connecting programmable logic controller (PLC) to terminal [Y1], [Y2], [Y3] or [Y4]
Figure 3.3-15 shows two examples of circuit connection between the transistor output of the inverter’s control circuit and a PLC. In example (a), the input circuit of the PLC serves as a SINK for the control circuit output, whereas in example (b), it serves as a SOURCE for the output.
C0
+24 VDC
Programmable logic controller
SINK input Photocoupler
<Control circuit>
[Y1]
to [Y4]
[CMY]
31 to 35 V
Current C0
Programmable logic controller
SOURCE input
+24 VDC
Photocoupler
<Control circuit>
[Y1]
to [Y4]
[CMY]
31 to 35 V Current
(a) PLC serving as SINK (b) PLC serving as SOURCE
Transistor output
Figure 3.3-15 Connecting PLC to Control Circuit
3.3 Mounting and Wiring the Inverter
Chap. 3 PREPARATION AND TEST RUN
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi- cation
Symbol Name Functions
[Y5A/C] General purpose
relay output (1) A general-purpose relay contact output usable as well as the function of the transistor output terminal [Y1], [Y2], [Y3] or [Y4].
Contact rating: 250 VAC 0.3 A, cos φ = 0.3, 48 VDC, 0.5 A
(2) Switching of the normal/negative logic output is applicable to the following two contact output modes: "Active ON" (Terminals [Y5A] and [Y5C] are closed (excited) if the signal is active.) and "Active OFF" (Terminals [Y5A] and [Y5C]
are opened (non-excited) if the signal is active while they are normally closed.).
Relay output
[30A/B/C] Alarm relay output (for any error)
(1) Outputs a contact signal (SPDT) when a protective function has been activated to stop the motor.
Contact rating: 250 VAC, 0.3A, cos φ = 0.3, 48 VDC, 0.5A
(2) Switching of the normal/negative logic output is applicable to the following two contact output modes: "Active ON" (Terminals [30A] and [30C] are closed (excited) if the signal is active.) and "Active OFF" (Terminals [30A] and [30C] are opened (non-excited) if the signal is active while they are normally closed.).
RJ-45 connector for the keypad
RS-485 communications port 1
(Connector for keypad)
Connector to join the keypad to the inverter.
Power is supplied to the keypad from the inverter via a remote operation extension cable.
[DX+]/
[DX-]
RS-485 communications port 2
(Terminals on control PCB)
Input/output terminals to transmit data through the RS-485 multipoint protocol between the inverter and a computer or other equipment such as a PLC.
(For setting of the terminating resistor, refer to Section 3.3.3.9 "Setting up the slide switches.")
Communication
USB
connector USB port
(On the keypad) A USB port connector (mini B) that connects an inverter to a computer. FRENIC-VG Loader (inverter support software*) running on the computer supports editing the function codes, transferring them to the inverter, verifying them, test-running an inverter and monitoring the inverter running status.
* FRENIC-VG Loader (free version) is available as an install from the CD-ROM (that comes with the inverter as an accessory) or as a free download from our website at:
http://www.fujielectric.com/products/inverter/download/
The free version supports editing, transferring and verifying of function codes and the traceback function.
[PA]
[PB]
Pulse generator 2-phase signal input
The PG interface uses a complementary output mode.
[PA]: Input terminal for A phase of the pulse generator [PB]: Input terminal B phase of the pulse generator
When 12V power supply is in use: H level ≥ 9V, L level ≤ 1.5V When 15V power supply is in use: H level ≥ 12V, L level ≤ 1.5V Input pulse frequency: 100 kHz or below, Duty: 50 ±10%
Wiring length (as a guide): 100 m or less
(Note) False detection may occur due to noise. Make the wiring length as short as possible and take sufficient noise control measures.
[PGP] Pulse generator
power supply Power supply terminal for a pulse generator.
Output: +12 VDC ±10% or +15 VDC ±10%
Maximum current: 270 mA
(For output voltage switch SW6, refer to Section 3.3.3.9 "Setting up the slide switches.")
Speed detection
[PGM] Common
terminal Common terminal for pulse generator power/signal.
Electrically isolated from terminals [11], [M] and [CMY].
Not electrically isolated from terminal [CM], but not equivalent voltage.
Table 3.3-8 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi- cation
Symbol Name Functions
[FA]
[FB]
Pulse generator
output (1) This outputs pulse generator signals with frequency divided to 1/n (where, n is programmable with Function code E29).
(2) Switchable between open collector and complementary (equivalent to the voltage on the [PGP] terminal) transistor outputs.
(For switching, refer to Section 3.3.3.9 "Setting up the slide switches.")
(a) Open collector output (b) Complementary output Figure 3.3-16 Pulse Output Circuit
Items Min. Max. Remarks
Output voltage - 2 V Output voltage
(Open collector output) Max. output current - 15 mA Hi level output PGP-3V - Low level output - 2 V Output voltage
(Complementary
output) Max. output current - 20 mA [CM] Pulse generator
output common Common terminal for [FA] and [FB].
[TH1] NTC/PTC thermistor connection
Monitors the motor temperature with NTC or PTC thermistor.
For a PTC thermistor, the motor overheat protection level can be specified with Function code E32.
Temperature detection [THC] Common Common terminal for NTC and PTC thermistors.
Electrically isolated from terminals [CM], [PGM], and [CMY]
CM
<Control circuit>
FA, FB
CM
CM
<Control circuit>
FA, FB P
10Ω 15kΩ
CM PGP
3.3 Mounting and Wiring the Inverter
Chap. 3 PREPARATION AND TEST RUN
Wiring for control circuit terminals
For FRN75VG1-2, FRN90VG1-2 and FRN132VG1-4 to FRN630VG1-4
(1) As shown in Figure 3.3-17, route the control circuit wires along the left side panel to the outside of the inverter.
(2) Secure those wires to the wiring support, using a cable tie (e.g., Insulok) with 3.8 mm or less in width and 1.5 mm or less in thickness.
Figure 3.3-17 Wiring Route and Fixing Position for the Control Circuit Wires
- Route the wiring of the control circuit terminals as far from the wiring of the main circuit as possible. Otherwise electric noise may cause malfunctions.
- Fix the control circuit wires with a cable tie inside the inverter to keep them away from the live parts of the main circuit (such as the terminal block of the main circuit).
Control circuit terminal block Cable tie
Wiring support
Wiring for control circuit terminals
Left side panel
Wiring for control circuit terminals
Section A
Details of Section A