Edwards nEXT730D User Manual

signal and the value of the system parameter on the analogue output can also be
obt
ained by interrogang the system status via the serial link.
For more informaon about the serial interface, refer to Connecon for serial control
and monitoring on page 59.
3.4.4 Serial control with parallel monitoring
Normal and analogue signals remain available when using serial control. It is possible to
control the pump via the serial link whilst monitoring these 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.
3.4.5 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 conguraon sengs stored in the motor controller or to monitor operaonal
status of the pump through the serial link or via the USB service port.
If using the USB service port in conjuncon with Edwards nST2 PC soware, the serial
enable signal does not need to be linked to 0 V for the serial communicaons to take
place. Whilst operang under parallel control with the USB service port, all of the
parallel control and monitoring signals are available (as described in Parallel control and
monitoring on page 19), including the standby control line and fail monitoring line.
If using the serial link, the serial enable signal must be linked to 0 V for serial
communicaons to take place. Whilst operang under parallel control with the serial link
acve, the parallel start control signal is available (as described in Parallel control and
monitoring on page 19) but the standby control line is not since it is used as a serial data
line.
If the serial enable line is deacvated at any me whilst the RS485/CAN/RS232 slide
switch is in the RS232 posion, the serial link should also be disconnected. Edwards
suggests making a special cable for serial communicaons that includes a link between
serial enable and 0 V. This way, serial enable is automacally acvated when the cable is
connected and then deacvated when the cable is removed.
3.4.6 CAN interface
Contact Edwards for more detail on the CAN interface.
The CAN LED illuminates green when the CAN communicaon is good and acve, and
red to indicate an error prevenng CAN communicaon.
3.4.7 Motor controller conguraon (serial conguraon)
All the conguraon sengs stored within the motor controller are retained when
power to the pump is removed, so that it is possible to use a separate system to
congure the motor controller before ng the pump to the applicaon.
This gives the benet of tailoring the pump funconality to a customer applicaon and
allows the pump to be operated using a simple parallel interface system.
08/2021 - ©Edwards Limited
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B8J200880_D - Overview

Edwards nEXT730D Specifications

General

Brand	Edwards
Model	nEXT730D
Category	Water Pump
Language	English