© Edwards Limited 2013. All rights reserved. Page 59
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Operation
B800-00-880 Issue D
4.5.2 Start the pump
To start the pump, send the following command over the serial communications link:
The reply will be in the following format:
The pump will then accelerate to full operating speed. 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.
4.5.3 Standby speed
To run the nEXT pump at standby speed, send the following command over the serial communications link:
The reply will be as follows:
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, send the following command:
The reply will be as follows:
4.5.4 Stop the pump
To stop the nEXT pump, send the following command over the serial communications link:
The reply will be in the following format:
On successful receipt of the stop command, the pump rotor will decelerate to rest.
4.5.5 Temperature readings
The temperatures of both the pump motor and the internal electronics of the nEXT pump can be monitored by
sending the following query:
The reply will be as follows, where the first number is the motor temperature and the second number the internal
controller temperature, both measured in °C:
Command !
C 8 5 2sp1cr
Reply * C 8 5 2sp1cr
Command !
C 8 6 9sp1cr
Reply *
C 8 6 9sp rcr
Command ! C 8 6 9sp0cr
Reply * C 8 6 9sp rcr
Command !
C 8 5 2sp0cr
Reply *
C 8 5 2sp rcr
Command ?
V 8 5 9cr
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