Edwards nEXT200200 - Serial Control and Monitoring; Serial Control with Parallel Monitoring; Parallel Control with Serial Monitoring or Serial Configuration

controlled v
enng opons). In this case, all these features will be at factory default
sengs. You can manually adjust the standby speed if standby mode is selected, but the
controller must be congured separately before the installaon of the nEXT pump to the
system. Refer to Controller conguraon (serial conguraon) on page 16 for more
informaon.
2.4.2 Serial control and monitoring
The serial communicaons link gives complete control and monitoring by using three
signal lines.
The serial data lines have the same connector pins as the parallel signals standby and
fail. The serial data lines can be congured to give an RS485 compliant or RS232
compable interface by seng the posion of the RS485 / RS232 slide switch. Refer to
Connecon for serial control and monitoring on page 41.
The serial enable signal must be linked to 0 V for the system to accept commands from
the serial link. This is a safety feature which operates as an interlock. For pure serial
control, the parallel start signal will be le unconnected.
The motor controller will connue to give normal and analogue signals on the logic
interface connector even when operang under serial control. You can get the status of
the normal signal and the value of the system parameter on the analogue output by
interrogang the system status through the serial link.
Refer to Connecon for serial control and monitoring on page 41 for more informaon
about the serial interface.
2.4.3 Serial control with parallel monitoring
Normal and analogue signals stay available when using serial control. You can control the
pump through the serial link while monitoring the normal and analogue signals in the
parallel interface.
The serial link uses the same connector pins as the parallel signals standby and fail so
these parallel control and monitoring signals are not available. The serial enable signal
must be linked to 0 V and the parallel start signal will be le unconnected.
2.4.4 Parallel control with serial monitoring or serial conguraon
Use this conguraon to operate the pump in parallel control mode, with the opon to:
▪ adjust the c
onguraon sengs stored in the motor controller or
▪ monitor operaonal status of the pump through the serial link
The serial enable signal must be linked to 0 V for serial communicaons to take place.
While operang under parallel control with the serial link acve, the parallel start
control signal is available (as given in Parallel control and monitoring on page 14) but the
standby control line will not be available as it is used as a serial data line.
If the serial enable line is deacvated while the RS485 / RS232 slide switch is in the
RS232 posion, the serial link must be disconnected. We recommend you to make a
special cable for the serial communicaons that includes a link between serial enable
and 0 V. This way, the serial enable is automacally acvated when the cable is
connected and deacvate when the cable is removed.
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B85200880_D - In
troducon