RKC INSTRUMENT PF900 - Wait

6. PROGRAM CONTROL
IMR02L04-E3
6-10
6.6 Wait
In the Program control operation, the Wait function switches the progress of segment into a standby state.
Types of Wait state:
 By Wait zone (Zone wait function)
 By segment
6.6.1 Description of function
 Wait state by Wait zone (Zone wait function)
When Measured value (PV) does not follow the progress of the program (when difference between PV and
SV remains) during the Program control operation, the program will be on standby state at Segment time end
point until the Measured value (PV) reaches the Wait zone.
Wait releasing condition: Wait function is released when the Measured value (PV) reaches the Wait zone.
[Example: At Level rising]
[Example: At Level dropping]
Wait function is available for Link operation by Intercontroller communication. For details, refer to
 Wait function in intercontroller communication of the PF900/PF901 Instruction Manual
(IMR02L03-E) on the CD-ROM.
Segment 1
Segment 2
Level
Time
Measured value (PV)
Program
p
attern
Wait zone low
Segment time end point
Wait function is ON when Measured value (PV) is outside of the
Wait zone.
Wait release point
Waiting period
Wait zone high
Wait zone of segment 1
Alternates displaying
“
WAIT” and “0:00” on the
TIME monitor display
during the Waiting period.
Waiting period
Segment 3
Segment 4
Level
Time
Wait zone high
Measured value (PV)
Wait release point
Segment time end point
Wait function is ON when Measured value (PV) is outside of the
Wait zone.
Wait zone low
Wait zone of
segment 3
Program
p
attern
Alternates displaying
“WAIT” and “0:00” on the
TIME monitor display
during the Waiting period.