Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1260

Processing details
This instruction performs normal PI operation during the operating time (ST).
The instruction checks whether ST or HT is applicable and, if ST is applicable, performs the following processing steps: SV
setting, tracking, gain (Kp) operation, SPI operation, and deviation check.
MV
ST HT
STHT
The following is the processing block diagram of the S.SPI instruction. (The numbers (1) to (7) in the diagram indicate the
order of the processing.)
RL, RH
E1
(1)
E2
SV setting
(When used)
ST
STHT
(6)
SPA
MODE
ERRI ¸ DVLI
DVLA
11 PROCESS CONTROL INSTRUCTIONS
1258
11.3 Control Operation Instructions
ST HT ST HT
STHT STHT
(2)
Tracking
(7)
Operating
RUN (SPA=0) time monitor
STOP (SPA=1)
Loop stop
determination
MAN
t
DL GW, GG P, I
(3) (4)
Gain (Kp)
SPI
operation
operation
processing
Operating time
(6)
BW=0
Loop stop
OFF
processing
DVL, DSLS
(5)
Deviation
check
AND
Hold time
BW=0
BW
BB1