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21 DEVICES
21.2 User Devices
How to turn annunciator (F) OFF
Annunciators (F) are turned OFF by the following instruction.
You can turn OFF by OUT F as well, but "Processing when annunciator (F) is OFF" described below is not
carried out even if annunciator numbers are turned OFF by OUT F instruction. If annunciator (F) numbers
are turned OFF by OUT F instruction, you must execute the RST F/BKRST instruction given above.
■Processing when annunciator (F) is OFF
Data stored in the special register becomes as follows.
• Data stored in SD62 to SD79 when RST F instruction or BKRST instruction is executed
1. Annunciator (F) numbers specified in the RST F instruction or the BKRST instruction are erased, and annunciator (F)
numbers stored subsequent to those erased are moved up.
2. If annunciator (F) numbers stored in SD64 are turned OFF, new annunciator (F) numbers stored in SD64 are stored in
SD62.
3. Decrements contents of SD63 by -1. If SD63 is "0", SM62 is turned OFF.
Link special relay (SB)
Communication and error detection status of network modules are output to link special relays within the network. Link special
relays (SB) are devices intended to be used as a refresh destination for link special relays within the network. Link special
relays not used for refresh can be used for other purposes.
Step relay (S)
Device used with step ladder Instructions. Where step ladder is not used, it can be used for purposes such as auxiliary relay.
Instruction Application
RST F instruction Used to turn OFF annunciator (F) number set by SET F instruction.
BKRST instruction Used to turn a specified range of annunciator (F) numbers OFF in a batch.
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