Omron NV Series Setup Manual page 149

Error Codes and Countermeasures
Error Codes for Modbus
Connections
NV3W
Code number Description
ERFF Timeout error
No response was
received from the PLC.
ERFE Response error
No response was
received from the
remote device.
NV3W-V1, NV4W or NV3Q
Code number Description
ER0001 Timeout error
No response was
received from the PLC.
ERFFFE Response error
No response was
received from the
remote device.
Modbus Connections to OMRON EJ1 Temperature Controller
NV3W error codes are displayed as "ER" followed by the two-digit code.
NV3W-V1, NV4W and 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 other
model "00" will be displayed after "ER."
Code number Description
ER01 Function code
error
ER02 Variable address
error
ER03 Variable data
error
ER04 Operation error
Countermeasure
1. The PLC Connecting Cable is discon-
nected. Check the wiring or the Con-
necting Cable and see if it is
disconnected.
2. The error may be temporary, e.g.,
caused by noise. Cycle the power sup-
ply to the PT and CPU Unit.
Check the data returned by the remote
device.
Countermeasure
1. The PLC Connecting Cable is discon-
nected. Check the wiring or the Connect-
ing Cable and see if it is disconnected.
2. The error may be temporary, e.g.,
caused by noise. Cycle the power supply
to the PT and CPU Unit.
Check the data returned by the remote
device.
Countermeasure
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 maxi-
mum 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 re-
set was being processed (including when
starting).
4. The operation was not executed because the
Controller was in Tuning Mode.
Section 7-5
129