21 DEVICES
21.3 User Device
335
21
On/off method for annunciator
Annunciators are turned on by either the SET Finstruction or the OUT F instruction. Annunciators are turned off by the
RST Finstruction or the LEDR instruction or the BKRST instruction.
When the annunciators are turned on/off using any methods (e.g. the MOV instruction) other than shown
above, the operation is the same as that of internal relays. As a result, SM62 is not turned on and annunciator
numbers are not stored into SD62 and SD64 (Table of detected annunciator numbers) to SD79.
■Operations when annunciators are turned on
1. The annunciator numbers turned on are stored sequentially into SD64 to SD79.
2. The annunciator number stored into SD64 is stored into SD62.
3. SD63 value (Number of annunciators) is incremented by one.
■Operations when annunciators are turned off
1. The number of the annunciator deactivated is removed, and the numbers of annunciators, which were lined up behind
the removed one, move forward one by one.
2. When the annunciator number stored into SD64 is turned off, the annunciator number newly stored into SD64 is stored
into SD62.
3. The value of SD63 is decremented by one. When the SD63 value gets decremented to 0, SM62 is turned off.
0
0
0
0
0
0
0
SD62
SD63
SD64
SD65
SD66
SD67
SD79
50
1
50
0
0
0
0
50
2
50
25
0
0
0
50
3
50
25
1023
0
0
SET F50 SET F25 SET F1023
50
2
50
1023
0
0
0
RST F25
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