B800-00-880 Issue D
Page 58 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Operation
4.4 Operation with parallel control and monitoring
4.4.1 Start the pump
Start the nEXT pump by linking the start/stop control input to the 0 V control reference on the logic interface
connector. The pump will then accelerate to full operating speed.
The green indicator on the controller will illuminate when the pump reaches normal speed. This is 80% of full
rotational speed by default but a different value may have been selected to suit the application.
4.4.2 Running at standby speed
To run the nEXT pump at standby speed, link the standby control input to the 0 V control reference on the logic
interface connector. If the pump is currently below standby speed then it will accelerate until it reaches standby
speed. If it is running faster than standby speed, it will decelerate until standby speed is reached.
To return the pump to full speed, disconnect the standby control input from the 0 V control reference on the logic
interface connector.
4.4.3 Stop the pump
Stop the nEXT pump by disconnecting the start/stop control input from the 0 V control reference on the logic
interface connector. The pump rotor will decelerate to rest.
4.4.4 Parallel monitoring
It is possible to monitor the following parameters:
Analogue output
Normal signal
Fail signal
Refer to Section 3.6 for instructions on how to monitor these signals. The analogue output is described in Table 10.
4.5 Operation with serial control and monitoring
4.5.1 Delayed start
If using a TAV solenoid valve controlled by the controller, it may be desirable to close it before starting the nEXT
pump. This will allow the backing pump to reduce the pressure in the vacuum system.
To close the vent valve, send the following command:
The reply will be in the following format:
Note: This command overrides the current vent option and closes the vent valve. There is no open vent valve
command but, when a stop command is sent to the pump, the override is cleared.
Command !
C 8 7 5sp1cr
Reply *
C 8 7 5sp rcr
To Next Page
Loading...
Need help?
General
