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Acknowledge/Clear Active Alarm Command
The Acknowledge/Clear Active Alarm command is used by the master computer to
silence the audible alarm horn and to clear alarms from the active alarm display. After
each new alarm or failure, the first control message received with this word set will only
silence the audible alarm horn. Subsequent alarm messages will clear any alarms which
are no longer active. This command is ignored when the compressor is in Local mode.
Change Current Setpoint Group Command
The Change Current Setpoint Group command is used to change the current active
set-point of the system (Groups 1-4).
When read, the currently selected setpoint group will be returned (0-3 for Suction Pres
sure Groups, 4-7 for Process Temperature Groups, and 8 for Sequenced)
NOTE: This may or may not actually affect the system capacity, depending on the current
mode of the compressor. For example, automatic capacity control is not
performed in the Manual Mode. Auto Start/Stop Control Command
Change Control Type Command
The Change Control Type Command is used to switch automatic control between
Suction Pressure and Process Temperature operation.
NOTE: The Process Temperature Control option must be enabled on the compressor
before this command may be issued.
When read, the current value of the control command will be returned.
Auto Start/Stop Control Command
The Auto Start/Stop Control command is used in the Automatic or Remote modes to
allow the compressor to start when the Cut-In setpoint is exceeded and to stop when
the Cut-Out setpoint is exceeded. When disabled, the compressor will run until
commanded to stop or a failure occurs.
When read, the current value of the Auto Start/Stop register will be returned.
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