M52 Microprocessor User's Guide
M52UMCT Oct-03 40
Co-Work™
Co-Work™ is a six function networking feature that is built into every M52 controller.
Through the use of a six wire telephone cable you can link up to 8 compressor circuits on one
local area network. What this does is it makes all units in the network operate as one system
which improves the system performance, reliability and manageability.
Refer to page 51 for the wiring details.
Co-Work™ performs the following six functions:
Two Levels of Duty Sharing.
The first level maintains the required number of duty units in the network and automatically
sequences duty and redundant units on to even out run time. This function is time based and
is factory set for 24hrs. This value is adjustable.
The second level of duty sharing automatically initiates lead/lag sequence of the components
among the duty units to equalize run time.
Data Synchronization.
Unit operation data such as set points, time schedule, alarm status (see Setting Summary page
for list of synchronized data) is synchronized among units under the same Co-Work™
network.
Sequential Load Activation.
Co-Work™ coordinates the activation and deactivation of components in a unit and within a
group of units to minimize in-rush current.
Control Redundancy
Co-Work™ allows multiple master units to coexist on the same network. In case any master
requires service the remaining units will automatically take over control of the whole system.
In the event of a controller failure control will be transferred automatically to the other
masters minimizing loss of system control and down time.
Expansion of Control Steps
Co-Work™ improves the system performance by utilizing the limited number of control steps
in individual units and converts them to a maximum of 8 steps. This provides more precise
control and limits on/off cycles by matching capacity to load.
Control Value Averaging
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