Instruction manual

2-32 3. Errors Displayed on the ZM-300 Series
3. Errors Displayed on the
ZM-300 Series
There are five kinds of error messages displayed on the ZM series:
1. Communication Error
2. Check
3. Warning
4. SYSTEM ERROR
5. Touch switch is active
1. Communication Error
* If the above error messages are displayed on the ZM-300 series without establishing
communication between ZM-300 and PLC, test the solution of remark “1.”
If the error occurs suddenly in communication, test the solution of remark “2.”
Communication Error
Time-Out
Screen No. : Received Code No. :
Retry
Communication Error
Time-Out
* When you go to [Comm. Parameter],
bring up the [Detail] tab window and set
[Continue] for [Comm. Error Handling],
a screen like the one shown below is
displayed.
Error Message Contents Solution Remarks
Time-Out Although a request to send is given
to the PLC, no answer is returned
within the specified time.
1) Check the communication parameters.
2) Check the cables and wiring.
1
3) Data may be disrupted because of noise.
Fix noise.
2
Parity An error occurred in parity check. 1) Check the cables and wiring. 1
2) Data may be disrupted because of noise.
Fix noise.
2
Framing Although the stop bit must be [1], it
is detected as [0].
1) Check the communication parameters.
2) Check the cables and wiring.
1
3) Data may be disrupted because of noise.
Fix noise.
2
Overrun After one character is received, the
next character is received before
internal processing is completed.
1) Check the communication parameters. 1
2) Data may be disrupted because of noise.
Fix noise.
2
Check Code The check code in the PLC
response was not correct.
1) Check the communication parameters. 1
2) Data may be disrupted because of noise.
Fix noise.
2