Edwards GXS 160

M588-00-880 Issue E
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Appendix A2
A2.9.2 Changing the clean cycle time
The time period for the dry pump clean cycle can be changed using the DP clean time menu item.
A2.9.3 Automatically initiating a clean cycle when the pump goes off-process
The dry pump can be configured to automatically start a dry pump clean cycle when it goes off-process. This is useful
if the pump requires regular cleaning on a particularly dirty process. This mode is enabled by setting enable in the
Start in Green Mode menu item.
A2.9.4 Turn inlet purge on during the clean cycle
To increase the gas flow though the dry pump during a clean cycle it is possible to configure the inlet purge gas valve
to be open during the clean cycle. This mode is enabled by setting enable in the Inlet purge menu item.
A2.9.5 Have inlet purge cycle after clean cycle
For some processes it is desirable to ensure that the pump is both fully dry and internally warm after a clean cycle
has been completed. The GXS pump can be configured to have an optional inlet purge cycle where the pump runs at
full speed. To enable this option, use the Purge time menu item and set the purge time to a value greater than zero.
A2.9.6 Allow on process
Allows a DP Clean to start while the pump is on process.
A2.9.7 Auto on shutdown
When enabled, a DP clean cycle occurs every pump auto shutdown.
A2.10 How to control pump speed
By default, both the dry pump and booster run at full speed whilst the pump is on-process. For some applications it
is advantageous to adjust the speed of the pump whilst it is on-process so GXS has the capability to run both the dry
pump and booster at various different speeds.
The speeds of the dry pump and booster can be controlled using a number of different methods as shown in
Table A25.
Note: The GXS also has a built-in PID controller, refer to Appendix A2.11 for more information.
Table A25 - Speed control sources
Speed control sources:
Normal speed (default)
External voltage 0 - 10 V input
*
*
Only one of the pumps (dry pump or booster) can be controlled by this at one time, although the other
pump can be controlled by a different source.
SIM protocol over one of the serial RS232 interfaces
SIM protocol over the Ethernet interface
As a second speed controlled from the PDT
*
As a second speed controlled from the MCM MicroTIM
*
Profibus interface