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8 I/O CONTROL INSTRUCTIONS
Processing contents
(1) Mode judgment
Either of the following processings is performed depending on the operation mode (MODE).
(a) When the operation mode (MODE) is any of MAN, CMB, CMV and LCM (alarm clear
processing)
1) MHA, MLA and DMLA of the alarm detection (ALM) are turned to 0.
2) MHA2 and MLA2 of the alarm detection 2 (ALM2) are turned to 0.
3) BB1 to BB4 of BB are turned to 0.
4) The tracking flag (TRKF) of the alarm detection inhibition (INH) is turned to 1.
5) "(5) Output ON time conversion processing" is performed.
(b) When the operation mode (MODE) is any of AUT, CAB, CAS, CCB, CSV, LCA and LCC,
"(2) Input addition processing" is performed.
However, when SEA of the alarm detection (ALM) is 1 and SM1501 is ON (with hold), BB1
to BB4 are turned to 0 and the S.DUTY instruction is terminated.
(2) Input addition processing
The temporary MV (T) is calculated on the basis of the input value (E1
(a) When the tracking flag (TRKF) of the alarm detection inhibition (INH) is 1, the following
processing is performed.
1) The manipulated value (MV) is stored into the MV internal operation value (MVP).
2) The input value (E1) is changed to 0. ( MV
3) The tracking flag (TRKF) of the alarm detection inhibition (INH) is turned to 0.
4) The temporary MV (T) is calculated with the following expression.
T
MVP
(b) When the tracking flag (TRKF) of the alarm detection inhibition (INH) is 0, the temporary
MV (T) is calculated with the following expression.
T
MVP
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E1
MVP
T
E1
MVP
T
MV).
0)
MELSEC-Q
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