Edwards nEXT 55, Инструкция по эксплуатации

Страница: 77 / 116

6.3.4 Parallel monitoring
The parameters that follows can be monitored:
▪ Analogue output
▪ Normal signal
▪ Fail signal
Refer to Connect the parallel control and monitoring on page 47 for instructions on how
to monitor the signals.
6.4 Operation with serial control and monitoring
6.4.1 Delayed start
If using a TAV solenoid valve controlled by the motor controller, it can be closed before
starting the pump. This allows the backing pump to decrease the pressure in the vacuum
system.
To close the vent valve, send the command that follows:
Command ! c 8 7 5 sp 1 cr
The reply is as follows:
Reply * c 8 7 5 sp r cr
Note:
This command overrides the current vent option and closes the vent valve. There is no
command to open the vent valve but, when a stop command is sent to the pump, the
override will be cleared.
6.4.2 Start the pump
WARNING: EXPOSED ROTOR
Risk of injury. Do not operate the pump with its rotor exposed. Connect the pump to
the vacuum system before you operate the pump. If the pump is operated with its
rotor exposed, the pump rotor can cause injury as it rotates at high speeds and the
rotating blades can not be visible.
WARNING: AUTOMATIC RESTART
Risk of injury. When the power is restored after a power cut, the pump will restart
automatically. Keep the pump connected to the vacuum system to prevent risk of
injury.
CAUTION: PUMP MOVEMENT
Risk of damage to equipment. Do not move the pump when it is in operation. The
gyroscopic forces generated by this movement can cause more use of the back up
bearing and can result in catastrophic failure of the pump.
07/2021 - ©Edwards Limited Page 77 B8G000880_E
B8G000880_E - Operation