Watlow PPC-2000 - Manual (Page 116)

Chapter 3: Operating with AnaWin 3 PPC-2000 User’s Guide
92 Watlow Anafaze Doc.# 30002-00 Rev 2.3
Setting up Control Channels
Closed-loop control channels can be set up in various ways in
the PPC-2000. The following procedure identifies the basic
steps:
1. See Inputs on page 127 for descriptions of the input
parameters. On the Inputs spreadsheet:
a. Choose the appropriate Input Type for the sensor con-
nected to each analog input you have wired.
b. Choose Units for each analog input.
c. For any linear voltage, current, or pulse sensors, set
the linear scaling parameters (Input Signal Lo, Input Sig-
nal Hi, PV Lo, and PV Hi). See Setting up User Selectable
Linear Inputs on page 98.
2. See Channels on page 115 for descriptions of the channel
parameters. On the Channels spreadsheet:
a. Choose the input in the PV Source field that you want
to monitor or use as feedback for closed-loop control
for each channel.
b. Choose outputs in the Heat Output Dest and/or Cool Out-
put Dest fields for each channel that you want to use
for closed-loop control.
c. Choose a Heat/Cool Output Type for each output.
d. Set the Heat/Cool Cycle Time for any outputs with Heat/
Cool Output Type set to Time Prop.
3. See Digital I/O on page 132 for descriptions of the digital
I/O parameters. On the Digital I/O spreadsheet:
a. Set the Direction for each I/O point to be used for con-
trol to Output.
4. On the Channels spreadsheet:
a. Set the Heat/Cool Prop Band for any outputs with Heat/
Cool Output Type set to On/Off to 1.
b. Set the PID parameters (Heat/Cool Prop Band, Heat/Cool
Derivative, and Heat/Cool Integral) for each output used
for PID control. The parameters may be determined
by performing an autotune on each channel or by oth-
er means. See Autotuning on page 93 or more infor-
mation on autotuning.
c. If both heat and cool outputs are used, set the Spread.
d. Set the Set Point to the desired value and the Control
Mode to Auto to begin closed-loop control.