Ledr; Error Display And Annunciator Reset - Mitsubishi MELSEC-Q/L Programming Manual

Program Example
(1) Program which outputs the comment of Y60 to Y30 to Y39 when X0 is turned ON.
[Ladder Mode]
7.9.3

LEDR

Error display and annunciator reset

7.9.3
LEDR
LEDR
Internal Devices
Setting
Data
Bit
––
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.
(2) Operations when an annunciator (F) is ON.
(a) When the CPU module has no LED display
The following operations will be conducted when the LEDR instruction is executed:
1) "USER" LED flickers, and is turned OFF
2) The annunciators (F) stored in SD62 and SD64 are reset, and the F numbers for SD65 to SD79 are moved up.
3) The data newly stored at SD64 is transmitted to SD62.
4) The data at SD63 is decremented by -1. However, if SD63 is 0, it remains 0.
Before execution
SD62 200
Decrements 1.
SD63 15
SD64 200
SD65 99
SD66 5
SD67 255
SD78 83
SD79 0
[List Mode]
Step
Command
R, ZR
Word Bit
After execution
SD62 99
SD63 14
SD64 99
SD65 5
SD66 255
F number storage area
SD77 83
SD78 0
SD79 0
Instruction Device
High
Basic
performance
J \
U \G
Word
––
Number of registered F numbers
LEDR
Process LCPU
Redundant Universal
LEDR
Zn Constants Other
1
2
3
4
4
6
7
8
437