Part 1: User Level  WSPC USER INTERFACE 
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SECTION 5  VARIABLE SPEED DRIVE (VSD) 
5.1  VSD OPERATION  
Generally the WSPC functions operate in the same manner for VSD machines as 
with non-VSD machines.  When a VSD compressor is connected to the WSPC, 
the program provides additional functionality for monitoring and controlling VSD 
operation.  This section defines those additional WSPC functions that are 
available for VSD compressors.   
5.2  COMPRESSOR DATA TAB  
When a VSD machine is connected to the controller, additional VSD related 
parameters are displayed at the Compressor Data screen.  See Figure 5.1.  The 
data shown indicate current, recent and lifetime performance of the VSD 
compressor package.  Lifetime data are averages or totals since the time the 
compressor was commissioned.  Recent data are averages and totals since the 
last reset.  Current data show instantaneous flow rate and power estimates of the 
compressor package. 
Figure 5.1  Compressor Display Tab – VSD Compressor 
 
 
VSD 
Performance 
Data