| Programmable Control Module 
A Programmable Control Module (PCM) provides direct digital control and
monitoring for a wide range of HVAC and other applications. Typical uses include
controlling air handling equipment, interfacing with
water chilling units and boiler systems, and controlling pumps and cooling
towers.
ICS Capability
The PCM extends the Trane ICS technology to existing, auxiliary, and
non-Trane equipment. A PCM communicates with a Tracer building control system over
a single communication link.
Software Capabilities
The PCM has the flexibility to provide custom standalone control sequences
using Process Control Language (PCL). The PCL routines
are programmable and can perform
logical and mathematical calculations.
The PCM also provides direct digital control (DDC) loops, which are
separate software modules, enabling proportional,
integral, and derivative (PID) control of modulating devices. The operator can
define PID gains along with high and low output limits.
The PCL routines and DDC loops can execute as frequently as once every five seconds.
Both the PCL and DDC software provide special testing capabilities for the
custom control sequences. Each PCL routine can be
manually executed, one statement at a time, in a special test mode to allow the operator to verify the program logic. The
performance of each DDC loop can be graphically plotted to assist the operator in tuning
the loop.
PCM programs are written and compiled on a PC using PCM Edit software.
This software also allows the operator to access the PCM to perform the
following functions:
- Modify parameters
- Edit the display setup
- View input/output status
- Use the PCL test function
- Plot DDC loops
- Manually control the PCM outputs
Hardware Description
Three versions of the PCM are available:
- Standard ambient: NEMA
Type 1 metal enclosure (32 to 120° F, 0 to 49° C)
- Extended ambient: NEMA
Type 1 metal enclosure (-40 to 158° F, -40 to 70° C)
- Weatherproof NEMA Type 4
metal enclosure suitable for outdoor use (-40 to 158° F, -40 to 70° C)
An optional display and keypad include a 2-line by 20-character LCD that can
display up to 32 status and control points.
Universal Programmable
Control Module
The Universal Programmable Control Module, or Universal PCM, is a
programmable, direct digital controller that provides
control and monitoring for a wide range of equipment. Typical uses include controlling
air handling units, monitoring chiller plants including
pumps and cooling towers, and serving as a central point gathering panel.
ICS Capability
As part of the ICS family and as an extension of the existing PCM, the
Universal PCM provides flexible, independent control
for a variety of applications. Because of its flexibility, the Universal PCM can provide control of both Trane and
non-Trane products. The Universal PCM communicates with
the Tracer 100 series (L, 100, and 100i) and the Tracer Summit family of products
via an ICS communication link.
Software Capabilities
Like the PCM, the Universal PCM has the flexibility of customized control
sequences using UPCM Edit software. Each Universal PCM
supports 25 PCL routines and 20 DDC loops, which can execute at a maximum
frequency of one second. |
