Mitsubishi MELSEC-A A1SCPUC24-R2 User Manual page 153

Table 6.3 Error Code List for A2ASCPU(S1/S30) and A2USHCPU-S1 (Continue)
Error
Error
Code
Massage
(D9008)
"OPERATION
ERROR"
50
(Checked at
execution of
instruction.)
Detailed
Error CPU
Code States
(D9091)
509 STOP
127
Error and Cause
(1) An instruction which
cannot be executed
by remote terminal
modules connected to
the MNET/MINI-S3
was executed to the
modules.
(2) Though there are 32
entries of
FROM
instructions
registered with a
instruction in the
mailbox memory area
waiting for execution),
another
PRC
instruction is
executed to cause an
overflow in the mail
box (memory area
waiting for execution).
(3) The
PIDCONT
instruction was
executed without
executing the
PIDINIT
instruction.
The instruction
PID57
was executed without
executing the
PIDINIT
or instruction.
PIDCONT
The program
presently executed
was specified by the
instruction.
ZCHG
(4) The number of
CC-Link dedicated
command executed in
one scan exceeded
10.
Corrective Action
(1) Read the error
step using a
peripheral
device and
correct the
program,
meeting
loaded
conditions of
or remote
TO
terminal
modules.
PRC
(2) Use special
register D9081
(number of
empty entries
in mailbox) or
special relay
M9081 (BUSY
signal of mail
box) to
suppress
registration or
execution of
the
PRC
instruction.
(3) Correct the
program
specified by
the
ZCHG
instruction to
other.
(4) Set the
number of
CC-Link
dedicated
commands
executed in
one scan to 10
or less.