Modbus Connections; Nv3W; Nv3W-V1/Nv4W/Nv3Q; Modbus Connections To Omron Ej1 Temperature Controller - Omron NV3W Connection Manual

Modbus Connections

12-5 Modbus Connections

12-5-1 NV3W

Error code
ERFF Timeout Error
The PLC did not return a
response.
ERFE Response Error
An error response was
returned by the external
device.

12-5-2 NV3W-V1/NV4W/NV3Q

Error code
ER0001 Timeout Error
The PLC did not return a
response.
ERFFFE Response Error
An error response was
returned by the external
device.

12-5-3 Modbus Connections to OMRON EJ1 Temperature Controller

Error code
ER01 Function code error
ER02 Variable address error
ER03 Variable data error
ER04 Operation error
Description
1. The cable connecting the PLC is disconnected. Check the cable for
incorrect wiring or disconnections.
2. A temporary error was caused by noise or other factor. Cycle the pow-
er to the PLC or PT.
Check the data that was returned by the external device.
Description
1. The cable connecting the PLC is disconnected. Check the cable for
incorrect wiring or disconnections.
2. A temporary error was caused by noise or other factor. Cycle the pow-
er to the PLC or PT.
Check the data that was returned by the external device.
NV3W error codes are displayed as "ER" followed by the two-digit code.NV3-
V1/NV4W/NV3Q error codes are displayed as "ER00" followed by the two
digit error code.
The notation for the NV3W is used in the following table. When using the
NV4W or NV3Q, "00" will be displayed after "ER."
Description
The function code is not supported.
1. There is an error in the write start address.
2. There is an error in the read start address.
1. The command is too short.
2. The command is too long.
3. The number of elements exceeds the maximum value.
4. The number of elements and data do not match.
5. The number of elements times two does not match the byte count.
6. The write data is outside the setting range.
7. An attempt was made to write to a read-only variable.
1. The operation command could not be received and was not executed.
2. The operation was not executed because data was being backed up.
3. The operation was not executed because a reset was being pro-
cessed (including when starting).
4. The operation was not executed because the Controller was in Tuning
Mode.
Cause and countermeasure
Cause and countermeasure
Cause and countermeasure
Section 12-5
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