1. List of Alarms
1.10 User PLC Alarms
I - 45
1.10 User PLC Alarms
Sub-status
Message
1 2
Details Remedy
U01
No PLC
-
-
The ladder is not a GPPW ladder or
PLC4B ladder.
(Note) Emergency stop (EMG) will
be applied.
Download the ladder of the
format selected with the
PLC environment selection
parameters (bit selection
#51/bit 4).
0x0010 -
Scan time error
The scan time is 1 second or longer.
Edit the ladder size to a
smaller size.
0x0040 -
Ladder operation mode illegal
A ladder different from the
designated mode was downloaded.
(Note) Emergency stop (EMG) will
be applied.
Download the ladder
having the same format as
when the power was reset
or turned ON.
0x0080 -
GPPW ladder code error
(Note) Emergency stop (EMG) will
be applied.
Download the correct
GPPW format ladder.
0x008x -
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) Emergency stop (EMG) will
be applied.
Download the correct
PLC4B format ladder.
0x0400 Number
of
ladder steps
Software illegal interrupt
The ladder process stopped
abnormally due to an illegal software
command code.
(Note) Emergency stop (EMG) will
be applied.
Turn the power ON again.
If the error is not reset,
download the correct
ladder.
Software exceptional interrupt
The ladder process stopped
abnormally due to a bus error, etc.
bit 0: BIN command operation error
bit 1: BCD command operation error
Refer to the methods for
using the BCD and BIN
function commands.
U10
Illegal PLC
0x800x Number
of
ladder steps
bit6: CALL/CALLS/RET
command error
bit7: IRET command execution error
(Note) Emergency stop (EMG) is
applied for bit 6/7.
Turn the power ON again.
If the error is not reset,
download the correct
ladder.
U50
Stop PLC
The ladder is stopped.
Start the ladder.
(Note) The number of ladder steps displayed on the screen may not match the actual number of error
occurrence steps because of the ladder timing. Use this as a guideline of the occurrence place.
Summary of Contents for MELDAS 60 Series
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Page 13: ...I EXPLANATION OF ALARMS ...
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Page 95: ...II EXPLANATION OF PARAMETERS ...
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