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Mitsubishi Electric MELSEC iQ-R Series - Page 1286

Mitsubishi Electric MELSEC iQ-R Series
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1284
11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
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.)
BB1
OR
BB4
BB5
AND
AND
AND
OFF
BW
PHA
PLA
ERRI¸PHI
ERRI¸PLI
ERRI¸HHI
ERRI¸LLI
ERRI¸DPPI
ERRI¸DPNI
HHA
LLA
DPPA
DPNA
E1
(2)
SPA
(3)
(5)
(5)
AND
BW
BB2
BB3
AND
AND
(1)
(4)
LL HH PL PH
LL’ HH’ PL‘ PH’
RL, RH
DPL, CTIM
PV
HS
STOP (SPA=1)
RUN (SPA=0)
Upper/lower limit check
Upper upper
limit check
Lower lower
limit check
Positive
Negative
Loop stop
determination
Loop stop
processing
Engineering
value
conversion
Engineering value reverse conversion
Variation
rate check
Upper limit
alarm
Lower limit
alarm

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