Edwards nXDS10i nXDS15i User Manual

A735-01-860 Issue A
Page 14 © Edwards Limited 2012. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Connection for serial control and monitoring
3.7.1 Assigning a multi-drop address
When you receive your nXDS pump it will have multi-drop mode disabled by default. Each individual pump must be
programmed with its own multi-drop address, via a point-to-point connection, before introduction into a multi-drop
network.
Send the following command to assign a multi-drop address (where the 'd' characters represent the address):
Note: The address can be any decimal number from 1 to 98. The address number 0 is used to disable multi-drop
mode. The address number 99 is reserved as a wild card and is used in the query set up detailed later.
The reply you receive will be as follows:
The multi-drop address is stored within the nXDS pump.
You can also send a query to the pump to find out whether it already has a multi-drop address. Send the following
command:
If you receive the reply shown below, your pump has multi-drop mode disabled:
If your pump already has a multi-drop address you will receive no reply and you must then communicate with your
pump in multi-drop message protocol.
Use the following query (using wild card address 99 which means ‘any’ node) to find out the multi-drop address of
the nXDS pump:
The reply you receive will be as follows, where dd denotes the multi-drop address of the pump:
You can disable multi-drop mode by assigning the pump an address 0. To do this, send the following command (where
dd denotes the multi-drop address of the pump and xx denotes the address of the node that is sending the command):
The reply you receive will be as follows:
Once multi-drop mode is disabled, the pump will no longer respond to multi-drop commands.
Command ! S
8 0 0spd dcr
Reply * S 8 0 0sprcr
Reply ? S
8 0 0cr
Reply = S
8 0 0sp0cr
Command # 9 9:9 9? S8 0 0cr
Reply #
9 9:9 9= S8 0 0spd dcr
Command #
d d:x x! S8 0 0sp0cr
Reply #
x x:d d* S8 0 0sp0cr

Edwards nXDS10i nXDS15i Specifications

General

Pump Type	Dry Scroll Pump
Pumping Speed	10 m³/h (nXDS10i), 15 m³/h (nXDS15i)
Motor Type	Brushless DC
Operating Temperature	+5 to +40 °C
Voltage	100-240 VAC, 50/60 Hz
Weight	15 kg

Summary

Introduction

Scope of this manual

Provides operational instructions for the nXDS pump serial communication protocol.

Description

Outlines the four control modes of the nXDS pump: None, Manual, Parallel, and Serial Control.

Technical data

Logic interface

Details the 15-way D-type logic interface connector and its pins for electrical connections.

Connection for serial control and monitoring

Serial connection

Explains connecting the nXDS pump to RS485 or RS232 serial input on control equipment or PC.

Serial enable

Describes activating serial enable via the logic interface for serial commands and its interlock function.

Serial protocol

Details the serial communication protocol settings: 9600 Baud, 8 bits, 1 stop, no parity, no handshaking.

Message structure

Explains the structure of messages for nXDS pump communication, including command and query formats.

Command set

Introduces tables summarizing commands, abbreviations, and error codes for controlling and monitoring the pump.

Operating the nXDS pump

Details serial commands for starting, setting standby speed, and stopping the nXDS pump.

Multi-drop operation

Explains how to connect and communicate with multiple nXDS pumps using a single serial link.

Mixed parallel and serial operation

Describes controlling the pump using both parallel and serial interfaces simultaneously.

Decoding status words

Explains how to decode system and service status words for fault finding and maintenance.