Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1286

Processing details
This instruction checks whether the input value (E1) exceeds the upper limit or underruns the lower limit to output an alarm.
The following is the processing block diagram of the S.PHPL instruction. (The numbers (1) to (5) in the diagram indicate the
order of the processing.)
RL, RH
E1
(5)
RUN (SPA=0)
Loop stop
determination
SPA
ERRI¸PHI
ERRI¸PLI
ERRI¸HHI
ERRI¸LLI
ERRI¸DPPI
ERRI¸DPNI
PHA
PLA
HHA
LLA
DPPA
DPNA
11 PROCESS CONTROL INSTRUCTIONS
1284
11.3 Control Operation Instructions
LL HH
(1)
Engineering value reverse conversion
LL' HH'
(2)
Upper/lower limit check
Upper limit
alarm
Lower limit
alarm
Upper upper
limit check
Lower lower
limit check
STOP (SPA=1)
(5)
Loop stop
processing
OFF
HS
PL PH
PL' PH'
(3)
Variation
rate check
Positive
Negative
BW
DPL, CTIM
PV
(4)
Engineering
value
conversion
AND
AND
AND
AND
AND
AND
BW
BB2
BB3
BB4
BB5
BB1
OR