Edwards nEXT85 User Manual

Refer to Connect the parallel control and monitoring on page 27 for more detailed
instrucons of how to use the parallel interface.
A system operang with only a parallel connecon is not capable of adjusng the conguraon
sengs stored in the motor controller (for example, power limit seng or controlled venng
opons). In this case, all these features would be at their factory default sengs. It is possible
to manually adjust the standby speed if standby mode is selected, however, the motor
controller should be congured separately before ng the pump to the system. This is
covered in more detail in Parallel control with serial monitoring or serial conguraon on page
17 and Motor controller conguraon (serial conguraon) on page 18.
Serial control and monitoring
The serial communicaons link provides complete control and monitoring by using just three
signal lines.
The serial data lines share the same connector pins as the parallel signals standby and fail. The
serial data lines can be
congured to provide 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 28).
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 and acts as an interlock. For pure serial control, the parallel
start signal will be le unconnected.
The motor controller will sll provide the normal and analogue signals on the logic interface
connector even when operang under serial control. The status of the normal signal and the
value of the system parameter on the analogue output can also be obtained 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 28.
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.
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 nST 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 16),
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 16) 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/RS232 slide switch is in the
RS232 posion, the serial link should also be disconnected. Edwards suggests making a special
B8G0-00-880A - Overview of the nEXT85
Page 17

Edwards nEXT85 Specifications

General

Brand	Edwards
Model	nEXT85
Category	Water Pump
Language	English