172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
236
Setting parameters for Heating/Cooling PID control
The Parameters in Heating/Cooling PID control can be calculated also in
Autotuning (AT) (Overlap/Deadband is excluded).
Refer to 8.3 Setting PID Values Automatically (Autotuning) for Autotuning (AT).
8.8 Using with MC-COS/MC-VCOS
The SC-F71 is the only controller that controls TLV steam control valves MC-
COS/MC-COSR and MC-VCOS/MC-VCOSR series.
MC-COS(R)/MC-VCOS(R) series combines an automatic pressure reducing valve
with a control valve. The sensing and feedback control with the controller together
with the control mechanism of the valve itself achieves a hybrid control.
Valve coefficient
The valve coefficient is a value individually determined for TLV steam control valves
MC-COS(R) series and MC-VCOS(R) series.
These products use the valve coefficient to control the combined control valve with
the optimum control output value and to control the steam pressure for the secondary
side of the control valve.
Therefore, when MC-COS(R) series and MC-VCOS(R) series are used in
combination with the equipment, it is necessary to set the valve coefficient of the
control valve to be used with the equipment.
* This function is only available when pressure control operation is selected. Control output
value will be calculated with PID control algorithm when temperature control operation is
selected.
NOTE: The pressure unit to be entered for the pressure value is defined by the valve
PN00
SV
Pn51
1.CONT
[Setting]
Setting end
Next parameter is displayed.
Press
and
<
MODE
keys simultaneously to return to the
Measured value (PV)/Set value (SV) Monitor.
(The
MONI
key may be pressed to return to the Measured
value (PV)/Set value (SV) Monitor.)
(Several
times)
Monitor & SV
setting mode
PV/SV monitor
1. Pc
1. Ic
0240
0
Set Integral time
PN56
1.COOL
(Several
times)
(Once or twice)
Set Proportional band
.
28
280
0 0
.
.
1. P
Set Proportional
band
1. oS
1. oS
Set Integral time
1. dc
0060
0
Set Derivative time
.
1. db
0000
0
Set Overlap/Deadband
Input 1_
Overlap/Deadband
.
Parameter setting mode
Parameter group No.00
[Setting]
Parameter group No.51
[heat-side]
Input 1_Proportional band
Set Derivative time
[heat-side]
Input 1_Derivative time
[heat-side]
Input 1_Integral time
[Input 1_Cooling control]
Parameter group No.51
[cool-side]
Input 1_
Proportional band
[cool-side]
Input 1_
Integral time
[cool-side]
Input 1_
Deriative time
0030
0
.
0240
0
.
0060
0
.
0030
0
.
Summary of Contents for SC-F71
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Page 18: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 17 Differential temperature control ...
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Page 293: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 292 Checking PID values ...
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