Chapter 8 Communication Functions
8 - 4
8.4 Modbus Communication parameter
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 communications. You may need to refer to the host computer documentation in order to match some
of its settings.
Func.
Code
Name Required Settings
A001 Frequency source
00
Keypad potentiometer
01Control terminal
02Function F001 setting
03Modbus network input
10 Calculate function output
A002 Run command source
01
Control terminal
02Run key on keypad, or digital operator
03 Modbus network input
C070 Selection of OPE/Modbus
00… Operator
01….Modbus-RTU
C071 Communication speed
04
4800 bps
05 9600 bps
06 19.2k bps
0738.4k bps
C072 Modbus Address
Network address, range is 1 to 247
C074 Communication parity
00
No parity
01Even parity
02Odd parity
C075 Communication stop bit
Range is 1 or 2
C076 Communication error select
00
Trip (Error code E60)
01Decelerate to a stop and trip
02Disable
03Free run stop (coasting)
04Decelerate 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
Note) When you change any of the parameters above, the inverter power must be rebooted in order to
activate new parameters.
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