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21 DEVICES
21.2 User Devices
207
21
How to turn annunciator (F) ON
Use SET F instruction. The annunciator (F) turns ON only during the rise time of input conditions (OFFON); the
annunciator (F) remains ON even if the input condition is OFF.
• The annunciator (F) can also be turned ON by OUT F instruction, but because it is processed every scan,
scan time is slower than when using SET F instruction.
• If it is turned ON by means other than SET F instruction or OUT F instruction (e.g. MOV instruction),
operation is the same as for internal relay. Thus, in SM62 does not turn ON, and annunciator (F) numbers
are not stored in SD62 and SD64 (Annunciator (F) Detection No. table) to SD79.
■Processing when annunciator (F) is ON
Data stored in the special register becomes as follows.
1. Annunciator (F) numbers that are ON are stored in SD64 to SD79 in sequence.
2. Annunciator (F) numbers that are stored in SD64 are stored in SD62.
3. Increments contents of SD63 (Annunciator (F) Detection Number) by +1.
If 17 or more annunciator's are ON, the numbers are not stored in SD64 to SD79.
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
Up to 16 annunciator numbers can be stored