YOKOGAWA NEW GREEN SERIES, User Manual

Page: 92 / 98

6-6
<Toc> <6. Function Block Diagram and Descriptions>
IM 05D01C12-41E 4th Edition: May 31, 2006-00
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Contact Input
Automatic (ON)/Manual (OFF) switching function is assigned to DI1 (contact input 1).
Manipulated output can be changed using the and keys in manual mode.
Run (OFF)/Stop (ON) switching function is assigned to DI2 (contact input 2). Preset output
value is output when the operation is stopped. PV input and alarms remain functioning as
normal.
It is possible to select one out of eight setpoints by turning the four contact input signals ON
or OFF. This function is assigned to DI3 (contact input 3) to DI6 (contact input 6).
Contact
input
8
DI3 OFF
DI4 OFF
DI5 OFF
DI6 ON
Selected target setpoint number (SPN) If all contact
inputs are set to
“OFF”, the
controller uses
the immediately
preceding target
setpoint.
7
ON
ON
ON
OFF
6
OFF
ON
ON
OFF
5
ON
OFF
ON
OFF
4
OFF
OFF
ON
OFF
3
ON
ON
OFF
OFF
2
OFF
ON
OFF
OFF
1
ON
OFF
OFF
OFF
For example, set contact input 4 (DI4) only to “ON” to change target setpoint 1 to 2. Set contact inputs 3 (DI3) and 4 (DI4) to
“ON” to select target setpoint 3.
Remote (ON)/Local (OFF) mode switching function is assigned to R/L (Remote/Local mode
switching contact input). External target setpoint can be set via remote input (INPUT3).
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Target Setpoint and PID
It is possible to use a maximum of eight groups of target setpoints and PID parameters.
The target setpoint can be selected by key operation or contact input. For selection by
contact input, refer to “Contact Input.”
Operating Parameters
Function Parameter
Target setpoint number selection SPN
Target setpoints 1 to 8 n.SP
Proportional band (P) n.P
OP.PA
OP.PA
OP.PA
Integral time (I) n.I
Derivative time (D) n.D
OP.PA
OP.PA
n.Pc OP.PA
n.Ic OP.PA
n.Dc OP.PA
Cooling-side proportional band (Pc)
Cooling-side integral time (Ic)
Cooling-side derivative time (Dc)
Menu
Note: Parameters n.SP, n.P, n.I, n.D, n.Pc, n.Ic, n.Dc (n=1 to 8) correspond to the target setpoint number selected in the
target setpoint number selection (SPN).