Compressor Configuration
12
Danfoss Turbocor Compressors Inc.
ECD-00007M Rev. 1
2.
Enter the Starting Output. This value equals the
percentage of maximum voltage sent to the terminals of
the Chiller Interface module on compressor start-up.
The analog output will hold at this position until the
start delay timer has expired.
3.
Enter Starting Output Delay Time. This value is the
amount of time from compressor start-up to hold the
voltage at the start-up %. Value is in seconds and starts
to count down when the drive is enabled.
4.
Check the Control Action checkbox for reverse acting.
Leaving the checkbox unchecked will enable direct
acting.
5.
Enter the Proportional, Integral, and Derivative gains to
provide stable control.
6.
Enter the minimum analog output (in DC volts) during
operation, if required. This parameter can be used, for
example, to maintain a minimum valve open position
during operation.
4.1.4 Modbus Communications
(Refer to Figure 12)
Set up the RS-485 and RS-232 ports, as required, on the
Chiller Interface module to enable communication with an
external PLC, computer or building management system.
4.1.5 Downloading and Saving
Configuration Data
At the end of the commissioning sequence, you have the
choice of either downloading the configuration data to the
compressor or saving it to a file for later use.
To save the data to a configuration file, click the Save to
Configuration File button. In the Save As dialog box, name
the file and save it in a designated location.
NOTE:
If modifications are made to the configuration data after the
commissioning is complete, the new values must be
recorded in a new commissioning session if the data is to be
saved to a file.
Never attempt a download while the compressor is
running as it can lead to a loss of compressor control.
Open interlock contacts on the Chiller Interface
module before downloading configuration data.
For immediate downloading of the configuration data to the
compressor, click the Download to Compressor button. To
enable the new configuration data, perform the following
steps:
Figure 11 Analog Output Setup
Figure 12 Modbus Communications Setup
