Start The Pump With Serial Control; Run The Pump At Standby Speed With Serial Control - Edwards nEXT730D Instruction Manual

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.

7.4.2 Start the pump with serial control

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.
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.
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.
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
The reply will be in the following format:
Reply
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
The reply will be in the following format:
Reply
To return the pump to full speed, send the following command:
B8J200880_D
300812671_002_C3
B8J200880_D - Operation
! c 8
* c 8
! c 8
* c 8
Page 81
5 2 sp 1
5 2 sp 1
6 9 sp 1
6 9 sp r
08/2021 - ©Edwards Limited
cr
cr
cr
cr