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Connecting the Inverter to ModBus Section B-2
Inverter Parameter Setup – The inverter has several settings related to
ModBus communications. The table below lists them together. The Required
column indicates which parameters must be set properly to allow communica-
tions. You may need to refer to the host computer documentation in order to
match some of its settings.
Note When you change any of the parameters above, the inverter power must be
rebooted in order to activate new parameters. Instead of rebooting, turning
ON/OFF of reset terminal works as same.
Func.
Code
Name Required Settings
A001 Frequency source ✓ 00 Keypad potentiometer
01 Control terminal
02 Function F001 setting
03 ModBus network input
10 Calculate function output
A002 Run command source ✓ 01 Control terminal
02 Run key on keypad, or digital operator
03 ModBus network input
C071 Communication speed ✓ 03 2400 bps
04 4800 bps
05 9600 bps
06 19.2 k bps
07 38.4 k bps
08 57.6 k bps
09 76.8 k bps
10 115.2 k bps
C072 Modbus Address ✓ Network address, range is 1 to 247
C074 Communication parity ✓ 00 No parity
01 Even parity
02 Odd parity
C075 Communication stop bit ✓ Range is 1 or 2
C076 Communication error select – 00 Trip (Error code E60)
01 Decelerate to a stop and trip
02 Disable
03 Free run stop (coasting)
04 Decelerate to a stop
C077 Communication error time-out – Comm. Watchdog timer period,
range is 0.00 to 99.99 sec.
C078 Communication wait time ✓ Time the inverter waits after receiving a
message before it transmits.
Range is 0. to 1000. ms
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