Pid Setup Screen 1; Figure 23 - Pid Setup Screen 1 - York YST Operation Manual

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
noTe: OptiView Control Center Screens shown may NOT represent the exact screens according to the software version utilized.
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figure 23 - pid SeTup SCreen 1

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This screen displays the present tuning parameters used
by the Leaving Chilled Liquid Temperature, Evapora-
tor Pressure, Condenser Pressure, Hotwell Level, and
Subcooler Level PID controllers. Each of the control-
ler boxes displays the input process variable (PV) that
is being controlled as well as the controller output sig-
nal (CV) that repositions the controlled device to main-
tain the process variable at setpoint (SP). The response
time of each controller is determined by the Propor-
tional (P), Integral (I), and Derivative (D) tuning set-
points entered. In some cases, different tuning parame-
ters must be entered to match the process response time
depending on the controlled device. The black text to
the right of the data fields changes to SPD, PRV, or
HgV depending on the mode selected with the Select
Control key. In some cases, a setpoint ramp rate (RR)
is also available. All setpoints require a login access
level of Service or higher. Service Technicians refer to
YORK Service Manual 160.67-M3 for operation and a
detailed explanation of the tuning parameters.
To view the results of a setpoint change, the applicable
Screen name is also referenced.
64

pid SeTup SCreen 1

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Temperature Control
Screen: Capacity Controls
SP (TCSP) Range: 36.0-70.0 °F
RR (RRSP1) Range: 0.1-2.0 °F/Sec
PID Tuning Ranges - P: 0.00-5.00
SPD PID Defaults -
PRV PID Defaults -
HGV PID Defaults -
This box displays parameters pertinent to the Leaving
Chilled Liquid Controller used to maintain the liquid
temperature (PV) at the setpoint (SP). The setpoint of
this controller is changed locally on the Setpoints Screen
or remotely via one of the available remote setpoint op-
tions. The output (CV) displayed will decrease to un-
load the chiller if the Leaving Chilled Liquid Tempera-
ture is below the Setpoint. The setpoint ramp rate (RR)
determines the rate at which the setpoint ramps to a
new value. The black text to the right of the data fields
changes to SPD, PRV, or HGV depending on the mode
selected with the Select Control key. The green Active
text changes to yellow Inactive text to display if the
controller is presently controlling the chiller capacity.
FORM 160.67-O1
ISSUE DATE: 4/1/2015
LD09267
SP (TCSP) Default: 42.0 °F
RR (RRSP1) Default: 0.1°F/Sec
I: 0.00-5.00
P: 1.00 I: 2.00
P: 2.00 I: 4.00
P: 2.00 I: 3.00
JOHNSON CONTROLS
D: 0.00-5.00
D: 0.00
D: 0.00
D: 0.00