Inverter Parameter Setup - Omron 3G3MX2 User Manual

Connecting the Inverter to ModBus
Func.
Code
A001 Frequency reference selection
A002 Run command selection
C071 Communication speed selection
(Baud rate selection)
C072 Communication station No. Selection
C074 Communication parity selection
C075 Communication stop bit selection
C076 Communication error selection
C077 Communication error timeout
C078 Communication wait time
P200 Serial comms mode
P201 to Modbus external register 1 to 10
P210
P211 to Modbus register format 1 to 10
P220
P221 to Modbus register scaling 1 to 10
P230
P301 to Modbus internal register 1 to 10
P310
P400 Big/Little endian selection
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.
Name
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.
Required

00 Digital operator
01 Terminal
02 Operator
03 ModBus communication
10 Operation function result

01 Terminal
02 Operator
03 ModBus communication

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

Network address, range is 1 to 247

00 No parity
01 Even
02 Odd

Range is 1 or 2
– 00 Trip
01 Decel-Trip (Trip after deceleration stop)
02 Ignore
03 Free-RUN (Free-run stop)
04 Decel-Stop (Deceleration stop)
– Comm. Watchdog timer period,
range is 0.00 to 99.99 sec.

Time the inverter waits after receiving a
message before it transmits.
Range is 0 to 1000 ms

00 Standard
01 Free mapping

Range is 0000h to FFFFh

00 Unsigned
01 Signed

Range is 0.001 to 65.535

Range is 0000h to FFFFh

00 Big endian
01 Little endian
02 Special endian
Section B-2
Settings
297