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
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
C070 Selection of OPE/Modbus
00… Operator
01….Modbus-RTU
C071 Communication
speed
04
4800 bps
05 9600 bps
06 19.2k bps
07
38.4k 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
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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