Setting Up The Slide Switches - Fuji Electric FRENIC-HVAC User Manual

2.3.2

Setting up the slide switches

Before changing the switches, turn OFF the power and wait at least ten minutes. Make sure that the LCD
monitor is 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.
Table 2.1 lists the function of each slide switch.
Slide Switch
SW1
SW2
SW3
SW4/SW6
SW5
Table 2.1 Function of Each Slide 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 be used as the SINK or SOURCE mode.
- Factory default: SINK
Switches the terminating resistor of RS-485 communications port on the inverter ON
and OFF. (RS-485 communications port 2, on the terminal block)
- 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)
- 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 mode of the analog output terminal [FM1]/[FM2] between voltage
and current.
When changing this switch setting, also change the data of function code F29/F32.
Output mode
Voltage output (Factory default)
Current output
Switches the property of the analog input terminal [C1] between analog setting current
input and PTC thermistor input.
When changing this switch setting, also change the data of function code H26.
Output mode
Analog setting current input
(Factory default)
PTC thermistor input
Function
[FM1]
SW4 F29 data
VO1 0
IO1 1, 2
SW5
C1
PTC
2-26
[FM2]
SW6 F32 data
VO2 0
IO2 1, 2
H26 data
0
1 (alarm) or 2 (warning)