Compressor Configuration
14
Danfoss Turbocor Compressors Inc.
ECD-00007M Rev. 1
4.3
Controlling User Access
The access code system allows OEM customers to set their
own unique pass codes thereby restricting access to
company authorized personnel.
These access codes control access to all adjustable
parameters via the Modbus communications layer. The
access levels are:
• Read only ~ User may only view values across the
Modbus layer.
• Low Level ~ User may only alter basic settings such as
leaving chilled water temp, display units, chiller enable/
disable, etc.
• Mid Level ~ User may alter all settings that are required
for commissioning a compressor in the field. Values
alterable, for example, are control mode, valve control
settings, run status contact energize RPM, reset load
profile data, and retrieve and save fault data.
• High level ~ User may alter all settings. This level of
access is reserved for users that configure motor/
compressor and bearing control only.
Upon power-up of the compressor, the access codes are
calculated and stored in RAM memory. The default user
access level on power up is read only.
To change the access code, select “Access Codes” from the
“Advanced” menu item; refer to Figure 15.
The Access Code Change form appears. To change the
access code for a specific user level:
1.
Select the appropriate radio button.
2.
Enter the current access code followed by the new
access code for the selected user level (if you enter the
incorrect access code nothing will be changed).
3.
Re-enter the new access code in the Confirm Access
Code field.
4.
Click the Change Access Code button.
NOTE:
The new access code does not take effect until the
compressor has been restarted.
Figure 15 Navigating to the Access Code
Change Form
Figure 16 Access Code Change Form