Appendix 4 Use of MODBUS Communication
199
4. Cut off the power supply and wait until keypad display disappears completely.
5. Switch on the power supply again.
6. Conduct the communication with PLC.
Setting of Communication Parameters
To communicate with PLC, communication-related parameters should be set. In the following table, only Pb.01 (ID
Number) and Pb.04 (response delay time) can be revised during operation to facilitate debugging, which becomes
effective immediately, while the rest parameters cannot be revised during operation. Then can only be set during the
stop time, and the reset parameters will not become effective until the inverter is powered off and then restarted.
“
○
” revisable during operation
；
“
×
” non-revisable during operation
Function
Code
Name of
Parameter
Setting Range
Ex-factory
Setting
Revision
After the
communication function
is selected, MODBUS
can be written into the
register
P0.03
Frequency
Setting
Source 1
0: NULL
1: Frequency number setting,
number knob adjustment
2: Terminal AI1
3: Terminal AI2
4: Terminal AI3 (Reserved for
3004GB and the below)
5: Impulse input
6: Communication giving
7: Linear speed (Reserved)
8: Multi-segment speed
9: Terminal UP/DOWN
10: (PLC)Program-timing
operation (PLC)
11: PID
12: Pendulum frequency
operation (and other special
operation modes)
When the frequency source is
0~7, if the multi-segment speed
terminal is effective, treat it as
“multi-segment speed”
1
×
0002H
P0.04
Frequency
Setting
Source 2
0~8: the same as above
9: torque difference
compensation
0
×
0005H
P0.07
Operation
Command
Giving
Manner
Setting
0: Keypad control
1: Terminal control 1(Key STOP
ineffective)
2: Terminal control 2(Key STOP
effective )
3: Serial communication 1(Key
STOP ineffective)
4: Serial communication 2(Key
STOP effective)
5: Terminal control 3(Key STOP
& JOG ineffective)
0
○
0001H
P0.11
Upper limit
of frequency
source
0: Digital setting
1: Terminal AI1
2: Terminal AI2
3: Terminal AI3 (Reserved for
3004GB and the below)
4: Impulse input
5: Communication setting
0
×
0008H
