Mitsubishi Electric L02SCPU User's Manual And Reference page 298

(2) Processing after annunciator on
Whenever an annunciator is turned on, SM62 turns on and the following data are stored in SD62 to SD79. The
annunciator number in SD62 is registered to the memory for error history storage.
2) The annunciator number in
SD64 is stored in SD62.
The USER LED on the front of the CPU module turns on (red).
Whether to turn on the USER LED can be set using the LED control function ( Page 169, Section 3.26).
(3) Turning off the annunciator
Use any of the following instructions.
(a) RST F instruction
This is used to turn off the annunciator number that was turned on with the SET F instruction.
(b) LEDR instruction
This is used to turn off the annunciator number stored in SD62 and SD64.
(c) BKRST instruction
This is used to turn off all of the annunciator numbers within the specified range.
(d) OUT F instruction
One annunciator number can be turned on or off with the same instruction. However, even if an annunciator
number is turned off with the OUT F instruction, the off processing described in (4) in this section is not
performed. If the annunciator is turned off with the OUT F instruction, execution of the RST F LEDR, or
BKRST instruction is required.
296
1) Turned-on annunciator numbers are stored in
SD64 to SD79 in order.
SD62
SD63
SD64
SD65
SD66
SD67
SD79
SET F50 SET F25 SET F1023
0 50 50
0 1 2
0 50 50
0 0 25
0 0 0
0 0 0
0 0 0
50
3) SD63 value is
incremented by "1".
3
50
25
1023
Up to 16 annunciator numbers
0
can be stored
0