Specifications

I Alarms
User PLC Alarms (U)
I - 56
11. User PLC Alarms (U)
(Note) For details of user PLC alarms (U), refer to the PLC Programming Manual.
U01 No user PLC - -
Details
PLC program is not input.
(Note 1) The number of PLC program steps displayed on the screen may not match the actual
number of error occurrence steps because of the PLC program timing. Use this as a
guideline of the occurrence place.
(Note 2) Emergency stop (EMG) will be applied.
Remedy
Download the PLC program with the format selected by the PLC environment selection pa-
rameters (bit selection "#51/bit4").
U10 Illegal PLC 0x0010 -
Details
PLC scan time error
The scan time is 1 second or longer.
(Note) The number of PLC program steps displayed on the screen may not match the actual
number of error occurrence steps because of the PLC program timing. Use this as a
guideline of the occurrence place.
Remedy
Edit the PLC program to make the size smaller.
U10 Illegal PLC 0x0040 -
Details
PLC program operation mode illegal
The downloaded PLC program is compatible with the designated mode.
(Note 1) The number of PLC program steps displayed on the screen may not match the actual
number of error occurrence steps because of the PLC program timing. Use this as a
guideline of the occurrence place.
(Note 2) Emergency stop (EMG) will be applied.
Remedy
Turn the power ON again or download the PLC program with the same format as at the power
ON.
U10 Illegal PLC 0x0080 -
Details
GPPW ladder code error
(Note 1) The number of PLC program steps displayed on the screen may not match the actual
number of error occurrence steps because of the PLC program timing. Use this as a
guideline of the occurrence place.
(Note 2) Emergency stop (EMG) will be applied.
Remedy
Download the PLC program with a correct GPPW format.
U10 Illegal PLC 0x008x -
Details
PLC4B ladder code error
An illegal circuit was found in the PLC4B ladder.
bit1: PC medium-speed circuit illegal
bit2: PC high-speed circuit illegal
(Note 1) The number of PLC program steps displayed on the screen may not match the actual
number of error occurrence steps because of the PLC program timing. Use this as a
guideline of the occurrence place.
(Note 2) Emergency stop (EMG) will be applied.
Remedy
Download the correct PLC4B format PLC program.
U10 Illegal PLC 0x0400 Number of ladder steps
Details
Software illegal interrupt
An abnormal stop occurred in the PLC program process due to an illegal code for software
command.
(Note 1) The number of PLC program steps displayed on the screen may not match the actual
number of error occurrence steps because of the PLC program timing. Use this as a
guideline of the occurrence place.
(Note 2) Emergency stop (EMG) will be applied.
Remedy
Turn the power ON again.
If the error is not reset, download the correct PLC program.