Error Messages - Mitsubishi Electric Q Series Operation Manual

Mistubishi Electric Q Series PLC Ladder Monitor Operation Manual

3.1 Error Messages

The following table lists errors that can occur when using the CF Card.
Message
CF Card switch is OFF
CF Card is not installed
CF Card Data Error
Cannot read from CF Card
Cannot write to CF Card
A file is not found
Ladder error *1
*1 When a circuit error occurs, the rudder display and reference after it cannot be performed.
The error message is detected when either of the following two conditions are satisfied.
(1) When screens are changed to display a new page.
(2) When a file's data is read again.
Solutions to the above errors vary depending on when the error occurred.
Error Occurrence
When reading the lad-
der program
3-2
Possible Cause
The lid of CF Card is open.
The CF Card has not been inserted
into the GP unit's CF Card socket.
CF card data is unusual.
CF card is not formatted.
Cannot read the file from CF Card.
CF card was extracted during read-
ing.
Cannot Write to file on the CF Card.
CF card was extracted during writ-
ing.
Availability of CF card is insufficient.
System file of a ladder monitor does
not exist.
The read data was not convertible
for the ladder figure.
A cable is extracted during read-out
of a ladder.
Internal Processing
Suspends processing
after error message is
displayed. After
recovery, processing
continues.
Solution
Check whether the lid of CF card is
open.
Check whether CF card is inserted
correctly.
Check whether the contents of CF
card can be read correctly.
Check whether CF card is format-
ted.
Check whether a file required for a
ladder monitor exists. It checks
whether CF card is inserted cor-
rectly.
Check whether CF card is inserted
correctly.
Check whether the capacity of CF
card is vacant.
Check whether a MEL_QP.SYS file
exists in CF card.
Check whether there is any ladder
command to which the ladder moni-
tor does not correspond.
Check whether a cable with PLC is
correct, and PC read-out is per-
formed again.
Recovery
Insert the CF Card
correctly.