Setting Up The Slide Switches - Fuji Electric Frenic Mega Series User Manual

2.4.2 Setting up the slide switches

Before changing the switches or touching the control circuit terminal symbol plate, turn OFF the power
and wait at least five minutes for inverters of 40 HP or below, or at least ten minutes for those of 50 HP
or above. Make sure that the LED monitor and charging lamp are turned OFF. Further, make sure, using a
multimeter or a similar instrument, that the DC link bus voltage between the terminals P(+) and N(-) has
dropped to the safe level (+25 VDC or below).
An electric shock may result if this warning is not heeded as there may be some residual electric
charge in the DC bus capacitor even after the power has been turned OFF.
Switching the slide switches located on the control PCB allows you to customize the operation mode of the
analog output terminals, digital I/O terminals, and communications ports. The locations of those switches
are shown in Figure 2.11.
To access the slide switches, remove the front cover so that you can see the control PCB. For inverters of
50 HP or above, open also the keypad enclosure.
For details on how to remove the front cover and how to open and close the keypad enclosure, refer
to FRENIC-MEGA Instruction Manual, Section 2.3.1 "Removing and mounting the front cover and
the wiring guide."
Table 2.1 lists function of each slide switch.
Switch
Switches the service mode of the digital input terminals between SINK and SOURCE.
▪ This switches the input mode of digital input terminals [X1] to [X7], [FWD] and [REV] to
SW1
be used as the SINK or SOURCE mode.
▪ The factory default is SINK.
Switches the terminating resistor of RS-485 communications port on the inverter ON and OFF.
(RS-485 communications port 2, on the control PCB)
SW2
▪ If the inverter is connected to the RS-485 communications network as a terminating device,
turn SW2 to ON.
Switches the terminating resistor of RS-485 communications port on the inverter ON and OFF.
(RS-485 communications port 1, for connecting the keypad)
SW3 ▪ To connect a keypad to the inverter, turn SW3 to OFF. (Factory default)
▪ If the inverter is connected to the RS-485 communications network as a terminating device,
turn SW3 to ON.
Switches the output form of analog output terminals [FM1] and [FM2] between voltage and
current.
When changing the setting of SW4 and SW6, also change the data of function codes F29 and
F32, respectively.
SW4/SW6
Output form
Voltage output (Factory default)
Current output
Switches the property of the analog input terminal [C1] between analog setting current input,
PTC thermistor input, and NTC thermistor input.
When changing this switch setting, also change the data of function code H26.
SW5
Function
Analog setting current input (Factory default)
PTC thermistor input
NTC thermistor input
Table 2.1 Function of Each Slide Switch
Function
[FM1]
SW4
VO1
IO1
PTC/NTC
PTC/NTC
2-29
2.4 Terminal Specifications
[FM2]
F29 data SW6 F32 data
0 VO2
1 IO2
SW5 H26 data
C1 0
1 (alarm) or 2 (warning)
3
0
1