172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
266
Switching the mode with Digital Input (DI)
To switch the Remote/Local (2-loop control/ Differential temperature control) using
the Digital Input (DI), u
se “DI function selection” in Function block No. 23
(Engineering mode).
Refer to 5.2 Switching Functions Using Digital Inputs (DI) for the Digital input
(DI) assignment.
Transfer timing of Remote/Local(2-loop control/ Differential temperature control)
After the contact is transferred, it takes “up to 200 ms” until the action of
this instrument is actually selected.
The functions at contact close and contact open can be swapped). This setting
can be done at “DI logic invert.” Refer to 5.2 Switching Functions Using Digital
Inputs (DI) for details.
Remote/Local transfer (2-loop control/ Differential temperature control) state
The table below shows the actual 2-loop control/ Differential temperature control
status and displays under different combinations of settings by Key operation,
Communication, and Digital input (DI).
Setting via front keys or
through communication
Setting via Digital Input (DI)
Instrument status
Differential temperature
control
Differential temperature
control
Differential temperature
control
2-loop control
2-loop control
2-loop control
Differential temperature
control
2-loop control
R/S
RUN
R/L
DIFF
setting mode
PV/SV monitor
Monitor & SV
R/L
2LOOP
20
.
Operation transfer mode
Remote/Local
transfer
(2 seconds
or more)
0 0
.
Switch to
2-loop control
MODE
RUN/STOP
transfer
MODE
or
MODE
+
setting mode
PV/SV monitor
Monitor & SV
280
.
0 0
.
(Several
times)
Measured value
(PV) of differential
temperature input
Set value (SV) of
differential
temperature input
2-loop control
2-loop control
Differential temp. control
2-loop
control/Differential
temperature control
Up to 200 ms
Contact closed
Contact open
Differential temp. control 2-loop control
NOTE
Содержание SC-F71
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