Mitsubishi MELSEC-Q series Programming Manual page 107

(6) 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.2PID instruction.
1) BW is turned to 0.
2) DVLA of the alarm detection (ALM) is turned to 0.
3) The operation mode (MODE) is changed to MAN.
4) BB1 of BB are turned to 0.
(b) Setting 0 in SPA of the alarm detection (ALM) selects a loop run.
A loop run performs "(7) Control cycle judgment".
(7) Control cycle judgment
(a) If the specified control cycle is not reached, BW ( MV) is turned to 0 and the S.2PID instruction is terminated.
(b) When the specified control cycle is reached, "(1) SV setting processing" is performed.
Operation Error
In the following cases, the error flag (SM0) turns ON and the error code is stored in SD0.
Error code
When an operation error occurs
When the values of
4100
non-normalized number
When CT < 0 or the execution cycle (SD1500) < 0
When the values of
4140
non-normalized number
4141 When an operation error occurs
Error definition
, , are either a non-numeric or
S1 S2 D2
, , are either a non-numeric or
S1 S2 D2
QnPHCPU QnPRHCPU
–– ––
–– ––
S.2PID
9
2
3
4
4
6
QnUDPVCPU
––
––
7
8
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