Edwards nEXT730 - Start the Pump with Serial Control; Run the Pump at Standby Speed with Serial Control

B8J200880_E - Operation
Page 95
CAUTION:
Do not operate the pump with its rotor exposed. Before operating the pump it must
first be connected to the vacuum system. If the pump is operated with its rotor
exposed, the pump rotor can cause injury as it rotates at very high speeds and the
rotating blades might not be visible.
7.4.2 Start the pump with serial control
In serial control the pump will accelerate to full operating speed when started.
To start the pump, send the following command over the serial communications link
Command
!
c
8
5
2
sp
1
cr
The reply will be in the following format:
Reply
*
c
8
5
2
sp
1
cr
The green indicator LED 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.
7.4.3 Run the pump at standby speed with serial control
If the pump is running below or above standby speed it will accelerate or decelerate
until standby speed is reached.
To run the nEXT pump at standby speed, send the following command over the serial
communications link:
Command
!
c
8
6
9
sp
1
cr
The reply will be in the following format:
Reply
*
c
8
6
9
sp
r
cr
To return the pump to full speed, send the following command:
Command
!
c
8
6
9
sp
0
cr
The reply will be in the following format:
Reply
*
c
8
6
2
sp
r
cr
CAUTION:
When power is restored following a power cut, the pump will restart automatically.
The pump must remain connected to the vacuum system to prevent risk of injury.
WARNING:
Do not move the pump whilst it is running. The gyroscopic forces generated by this
movement can cause excessive use of the back-up bearing and may result in
catastrophic failure of the pump.