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7-172
LEDR
7.9.3 Error display and annunciator reset instruction (LEDR)
LEDR
Function
Resets the self-diagnosis error display so that annunciator display or operation can be continued.
With one execution of this instruction, either error display or annunciator is reset.
(1) Operation when self-diagnosis error is generated
(a) If the self-diagnosis error is one which allows continued operation.
If the self-diagnosis error being displayed is one that will allow continued operation of
the CPU module, the "ERROR/ERR." LED or error indication is reset. It will be
necessary to reset SM0, SM1, and SD0 at the user program, because they are not reset
automatically.
Since the cause of the error displayed at this time has a higher priority over annunciator,
no action for resetting the annunciator is taken.
(b) When a battery error is generated.
If the LEDR instruction is executed after the battery has been replaced, the "BAT. ARM/
BAT." LED at the front of the CPU module and the error display will be reset.
SM51 is also turned OFF at this time.
Setting
Data
Internal Devices
R, ZR
J\
U\G
Zn Constants Other
Bit Word Bit Word
–– ––
Process
High
performance
Redundant
Universal
Basic
Command
LEDR
LEDR