Hydromatic II Chiller Operation Manual

Table Of Contents
Page 28
Rev 1.07 ©2015 Micro Air Corp 10/26/2015
Glossary
(Simplified for Hydromatic II)
Bus:
A wired connection consisting of 2 or 3 wires connected to each control in a
sequentially wired, daisy chain style connection.
CAN:
Computer Area Network is a communications system that facilitates
communication between electronic controls.
Differential:
The temperature change required to start a stage. This can be set in the Operating
Parameters menu.
Group ID:
A user defined ID number used to permit communications between similar
controls.
Master:
A slave assigned to perform the master function.
Master Function:
The control of operations of all slaves and pumps properly configured with a
common group ID.
Slave:
A slave is any Hydromatic control in a CAN system.
Slave Function:
A slave is responsible to turn on outputs when commanded by the master. The
slave will also detect faults with devices connected to it, and relay sensor and
switch status to the master.
Stages:
Compressors and heaters can be grouped so that more than one slave can be
turned on or off at specific temperature intervals. These grouped units of heating
or cooling capacity are called stages.
Terminator:
A usually black 2 pin jumper placed over a two pin header located near the CAN
connection jack. These jumpers are installed only on the controls at the beginning
and end of the CAN bus.
Unit ID:
A user defined ID number assigned uniquely to each control in a CAN system.