Mitsubishi Electric MELSEC iQ-R Series - Page 1338

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11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
■Output type (1)
The output type is determined by the combination of control mode (MODE) and operation type (TYPE) as follows.
■Loop stop processing (2)
The following processing is performed according to the SPA status of the alarm detection (ALM).
■SV count-up processing (3)
SV count-up is performed every execution cycle (T) according to the following expression.
SV'=SV+T
■MVPGS operation (4)
MV
PGS
operation is shown below.
■Output processing (5)
The output processing conditions are shown below.
*1 If the MHI or ERRI of the disable alarm detection (INH) is set to 1, the output upper limit alarm (BB2) and the MHA of the alarm detection
(ALM) are set to 0.
*2 If the MLI or ERRI of the disable alarm detection (INH) is set to 1, the output lower limit alarm (BB3) and the MLA of the alarm detection
(ALM) are set to 0.
Control mode (MODE) Operation type (TYPE) Operation
MAN, CMB, CMV, LCM, LCA, LCC  Operation stop with the current SV and MV
AUT, CAB 0 Hold type operation
1 Return type operation
CAS, CCB, CSV  Cyclic type operation
SPA status Processing details
1 The loop stops.
When the loop stops or the number of operation constant break points is 0, the following operations are performed and the S.PGS
instruction ends.
• The output value (BW) is held.
• All of the output alarm bits (BB1, BB2, and BB3) are set to 0.
• The MHA and MLA of alarm detection (ALM) are set to 0.
• The control mode (MODE) is set to MAN.
0 The loop runs. When the loop runs, "SV count-up processing (3)" is performed.
Output type Hold type Return type Cyclic type
Control mode (MODE) AUT, CAB CAS, CCB, CSV
MV
PGS
operation SV<SV1 MV1
SV
n-1
SV<SV
n
Processing at SV'>SV
n
0: Mode shift MAN MAN No mode shift
SV Last value 0 0
MV Last value Last value MV1
Restart method After SV setting, change to
the MANAUT mode.
Change to the MANAUT
mode.
Automatic restart
Condition Manual Automatic
MAN, CMB, CMV, LCM, LCA, LCC AUT, CAB, CAS, CCB, CSV
BW BB2, MHA BB3, MLA BW BB2, MHA BB3, MLA
MV
PGS
>MH MV
n
00 MV
n
=MH 1
*1
0
MV
PGS
<ML MV
n
00 MV
n
=ML 0 1
*2
Others MV
n
00 MV
n
=MV
PGS
00
MV
n
- MV
n-1
SV
n
- SV
n-1
×(SV’-SV
n-1
)+MV
n-1