Precautions
Do not change the value with program or engineering tool.
Inverter communication error code is not cleared even if communication is restored to normal state.
Devices are cleared when power is turned OFFON, STOPRUN, system is reset or SM50 (Error Detection Reset
Completion) is turned ON.
IVBWR instruction error parameter number
These devices store the parameter number in which an error has occurred when IVBWR instruction error flag turns ON.
FX5 dedicated
CH1
CH2
CH3
SD8921
SD8931
SD8941
R: Read only
Error code of first error that occurred is maintained if multiple errors occur for IVBWR instruction.
Precautions
Do not change the value with program or engineering tool.
Response wait time
Stores the communication response wait time set in the communication settings. (Page 95)
FX5 dedicated
CH1
CH2
SD8981
SD8991
R: Read only
Precautions
If the set value is outside the range or less than 100 ms, response waiting time operates as 100 ms.
Do not change the value with program or engineering tool.
Serial communication operation mode
Stores the communication function code of the serial communication under execution.
FX5 dedicated
CH1
CH2
CH3
SD8503
SD8513
SD8523
R: Read only
Precautions
Do not change the value with program or engineering tool.
These devices store "7" while an inverter communication instruction is being driven or not, as long the communication mode
has not changed.
FX3 Series
compatible
CH4
CH1
CH2
SD8951
SD8154
SD8159
CH3
CH4
SD9001
SD9011
FX3 Series
compatible
CH4
CH1
CH2
SD8533
SD8419
SD8439
Description
Stores the parameter number which could not be
written by IVBWR instruction.
Description
Stores the communication response wait time of
inverter communication.
1 to 32767 (ms)
Description
0: MELSOFT Connection
2: MC protocol
3: N:N Network Communication
5: Non-protocol Communication
7: Inverter Communication
9: MODBUS RTU Communication
12: Predefined protocol support
Other than above: Not used
4 INVERTER COMMUNICATION
R/W
R
R/W
R
R/W
R
127
4.10 Related Devices
4