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Technical Information
4.6.1.1
Emerson ED3 Drive
One Emerson ED3 drive can be connected to the Modbus master interface. The default Modbus address is
45, which is the factory default address of the drive. If required this address can be changed in the
configuration of the controller and the drive (separate description file).
At start up, the controller set to the configured package code (comp drive + application envelope),
the discharge line temperature protection to 120 °C and the speed up and down rate to the configured
values.
The available information on the controller are:
•
Package code
•
Compressor speed
•
Requested compressor speed
•
Hardware, system, compressor and PFC failure
•
Drive status
•
Discharge line temperature
In case of a communication failure, the compressor is stopped.
4.6.1.2
Carlo Gavazzi Soft starter
Up to three soft starters can be connected to the Modbus master interface. The Modbus address must be set
in the configuration. A Modbus address of 0 means that the soft starter is not available. The Carlo Gavazzi
soft starter allows to switch the compressor via Modbus command and get a feedback of the compressor
status. To use CG soft starters the compressor command type must be set to soft starters.
At start up, the controller set the heart beat function and the refresh interval (10 s). This means that in case
there is no live beat from the controller for 10 s the soft starter is tripping.
The available information on the controller are:
•
Status
•
Voltage L1
– L3
•
Power
•
Alarms
In case of a communication failure to a soft starter the controller will entering alarm mode.
4.6.1.3
EBM ESM Fan
Up to six ESM fans can be connected to the Modbus master interface. The Modbus address must be set in
the configuration. A Modbus address of 0 means that the fan is not available. In case of a communication
failure the ESM fan continue to run on the speed configured at the last startup of the controller (emergency
function).
The available information on the controller are:
•
Status
•
Speed
