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9 CONTROL OPERATION INSTRUCTIONS
(9) Loop stop processing
(a) Setting 1 in SPA of the alarm detection (ALM) selects a loop stop.
A loop stop performs the following processing and terminates the S.PIDP instruction.
1) BW retains the last value.
2) DVLA, MHA, MLA and DMLA of the alarm detection (ALM) are turned to 0.
3) MHA2 and MLA2 of the alarm detection 2 (ALM2) are turned to 0.
4) The operation mode (MODE) is changed to MAN.
5) BB1 to BB5 of BB are turned to 0.
(b) Setting 0 in SPA of the alarm detection (ALM) selects a loop run.
A loop run performs "(10) Control cycle judgement".
(10) Control cycle judgment
(a) When the specified control cycle is not reached, " (6) mode judgement" as T = MV is
performed.
(b) When the specified control cycle is reached, "(1) SV setting processing" is performed.
ERROR
• When an operation error occurs
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MELSEC-Q
Error code: 4100
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