INTRODUCTION
2
SNAP PID Module User’s Guide
Inputs and Outputs
The SNAP-PID-V can use 0–10 VDC analog inputs for PID setpoint and process variables. Analog
inputs share a common reference and are not isolated from each other. PID output, sharing a
common negative terminal, provides 4–20 mA current and 0–10 VDC voltage outputs. (The PID
output value is calculated by the module and then sent simultaneously to both 4–20 mA and 0–10
VDC outputs as a percent of output scale.) Additionally, PID output can be configured for analog
or time-proportional-output (TPO) signals.
The standard SNAP removable top-mounted connector allows easy wiring of inputs and outputs.
LED indicators, shown on
, are provided to show PID calculation mode status (manual or
auto) and PID output signal status (analog or TPO).
Software Support
PID loop tuning and module configuration can be performed using OptoENET PID Module Tuner
software, which is available free of charge on the Opto 22 Web site (www.opto22.com). This
software plots PID values against time to provide visual feedback when tuning PID loops.
Additionally, the SNAP-PID-V can be accessed using OptoControl, Opto 22’s development tool for
industrial automation programming that is part of the FactoryFloor suite of industrial automation
software.
What’s in this Guide?
This guide assumes that you have some familiarity with tuning PID loops. Many commercial
resources are available for learning about this subject. To learn more about the SNAP Ethernet
brain used with the SNAP PID module, see Opto 22 form 1112, the
SNAP Ethernet Brain User’s
Guide.
This document can be downloaded from the Opto 22 Web site at www.opto22.com.
This guide includes the following sections:
•
Quick Start to get your PID module installed and connected quickly
•
Instructions for setting PID parameters using ioManager utility software or OptoENET PID
Module Tuner software
•
Wiring diagrams
•
Specifications.
For Help
If you have problems installing or using SNAP PID modules and cannot find the help you need in
this guide or on our Web site, you can call, fax, or e-mail Opto 22 Product Support.
