RLC-SVU01B-E4 5
Controls Interface
Tracer CH.530™
Communications Overview
TheTrane CH.530 control system that
runs the chiller consists of several
elements:
•The main processor collects data,
status, and diagnostic information,
and communicates commands to
the starter module and the LLID
(Low Level Intelligent Device) bus.
The main processor has an integral
display (EasyView or DynaView).
•Higher-level modules (e.g., starter)
exist only as necessary to support
system-level control and
communications.The starter
module provides control of the
starter when starting, running, and
stopping the chiller motor. It also
processes its own diagnostics and
provides motor and compressor
protection.
•Low Level Intelligent Device (LLID)
bus.The main processor
communicates to each input and
output device (e.g., temperature
and pressure sensors, low voltage
binary inputs, analog input/output)
all connected to a four-wire bus,
rather than the conventional
control architecture of signal wires
for each device.
•The communication interface to a
building automation system (BAS).
•A service tool to provide all service
and maintenance capabilities.
Main processor and service tool
software is downloadable from
www.Trane.com.
EasyView or DynaView provides bus
management. It has the task of
restarting the link, or filling in for
what it sees as “missing” devices
when normal communications have
been degraded. Use ofTechView may
be required.
The CH.530 uses the IPC3 protocol
based on RS485 signal technology
and communicating at 19.2 Kbaud, to
allow three rounds of data per
second on a 64-device network. A
typical four-compressor RTAC will
have approximately 50 devices.
Most diagnostics are handled by the
EasyView or DynaView. If a
temperature or pressure is reported
out of range by an LLID, the
EasyView or DynaView processes
this information and calls out the
diagnostic.The individual LLIDs are
not responsible for any diagnostic
functions.The only exception to this
is the Starter module.
Note: It is imperative that the CH.530
ServiceTool (TechView)be used to
facilitate the replacement of any LLID
or reconfigure any chiller
component.TechView is discussed
later in this section.
Controls Interface
Each chiller is equipped with either
the EasyView or DynaView interface
to the CH.530. EasyView provides
basic monitoring and control
functions in a language-independent
format, with an LED display in an
enclosure. DynaView has the
capability to display additional
information to the advanced
operator, including the ability to
adjust settings. Multiple screens are
available and text is presented in
multiple languages as ordered.
TechView can be connected to either
the EasyView or DynaView module,
and provides further data,
adjustment capabilities, and
diagnostics information using
downloadable software.
