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Description
nXDS6i
nXDS10i
nXDS15i
nXDS20i
nXDS6iC
nXDS10iC
nXDS15iC
nXDS20iC
nXDS6iR
nXDS10iR
nXDS15iR
nXDS20iR
Instruction Manual
Serial Comms Interface
Item Number
Description
A73501983
nXR30i 100-127/200-240 V 1ph 50/60 Hz NW25 Inlet
A73601983
nXR40i 100-127/200-240 V 1ph 50/60 Hz NW25 Inlet
A73701983
nXR60i 100-127/200-240 V 1ph 50/60 Hz NW40 Inlet
A73801983
nXR90i 100-127/200-240 V 1ph 50/60 Hz NW40 Inlet
A73502983
nXR120i 100-127/200-240 V 1ph 50/60 Hz NW40 Inlet
A73602983
A73702983
A73802983
A73503983
A73603983
A73703983
A73803983
Original Instructions
A73501860
Issue B
Item Number
A90301983
A90401983
A90502983
A90602983
A90702983
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Related Manuals for Edwards nXR30i
Summary of Contents for Edwards nXR30i
- Page 1 Instruction Manual Serial Comms Interface Description Item Number Description Item Number nXDS6i A73501983 nXR30i 100-127/200-240 V 1ph 50/60 Hz NW25 Inlet A90301983 nXDS10i A73601983 nXR40i 100-127/200-240 V 1ph 50/60 Hz NW25 Inlet A90401983 nXDS15i A73701983 nXR60i 100-127/200-240 V 1ph 50/60 Hz NW40 Inlet...
- Page 2 Copyright notice ©Edwards Limited 2021. All rights reserved. Trademark credits Edwards and the Edwards logo are trademarks of Edwards Limited, Innovation Drive, Burgess Hill, West Sussex RH15 9TW. Disclaimer The content of this manual may change from time to time without notice. We accept no liability for any errors that may appear in this manual nor do we make any expressed or implied warranties regarding the content.
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Page 3: Table Of Contents
A73501860 Issue B Contents Section Page Introduction ..................1 Scope of this manual ....................1 Description........................ 1 Technical data ..................3 Logic interface ......................3 Connection for serial control and monitoring ..........5 Serial connection ......................5 Serial enable ......................6 Serial protocol ...................... - Page 4 A73501860 Issue B Illustrations Figure Page Start / Stop Control Diagram ................... 1 Logic interface locations ....................2 Logic interface connections - RS232 serial control ..............5 Logic interface connections - RS485 serial control ..............6 RS485 multi-drop connections ..................13 Logic interface connection - mixed parallel and serial operation ..........15 Tables Table...
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Page 5: Introduction
Introduction Scope of this manual This manual provides operational instructions for the Edwards serial communication protocol. Read this manual before you attempt to operate your product using serial communication protocol. For safety and operating information, please refer to the relevant product Instruction manual. -
Page 6: Logic Interface Locations
A73501860 Issue B The pump can be connected directly to the RS485 or RS232 serial input on your control equipment or a PC, using a suitable connector mating half (not supplied). Full serial control is realised by using the following two signal lines: serial enable and RS232 / RS485 control inputs. -
Page 7: Technical Data
A73501860 Issue B Technical data Logic interface The connector has a male 15-way D-type logic interface connector located on the user interface panel (Figure 2, Item 2). The logic interface connector can be plugged directly into your control equipment or a PC using a suitable connector mating half (not supplied). - Page 8 A73501860 Issue B Table 2 - Logic interface technical data Logic interface description Connector 15-way D-type (male) Start, serial enable and remote enable: Enable control voltage: low (closed) 0 to 0.8 V d.c. (l = 0.55 mA nominal) Disable control voltage: high (open) 4 to 26.4 V d.c.
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Page 9: Connection For Serial Control And Monitoring
A73501860 Issue B Connection for serial control and monitoring The serial interface allows you to control the pump and to interrogate its operational status using a number of serial commands. There is also a multi-drop mode that allows you to connect more than one pump to a single serial port on your control system. -
Page 10: Serial Enable
A73501860 Issue B Figure 4 - Logic interface connections - RS485 serial control 1. RS485 interface on control equipment or PC 2. Pump logic interface Serial enable To send a serial message you must first activate serial enable. This is achieved by linking the serial enable input signal (pin 5) to pin 2 of your logic interface mating half. -
Page 11: Message Structure
A73501860 Issue B Message structure The message structure and command set are the same for RS485 and RS232 options. To communicate a message to the pump you must send the characters in a specific order. If the message does not conform to the correct structure it will be ignored and no reply will be sent. - Page 12 A73501860 Issue B Table 3 - Summary of the commands that can be sent to the pump Parameter Factory Object name Command Data type Units Comments range setting Acts as wildcard object num- ber to identify Identification instrument. Reply identical to ?S801 ?S800 Slave Multi-drop address (RS485)
- Page 13 A73501860 Issue B Table 3 - Summary of the commands that can be sent to the pump (continued) Parameter Factory Object name Command Data type Units Comments range setting † 0..150 Decimal °C Measured pump temperature Temperature ?V808 Measured pump-controller readings 0..150 Decimal...
- Page 14 A73501860 Issue B Table 3 - Summary of the commands that can be sent to the pump (continued) Parameter Factory Object name Command Data type Units Comments range setting 0..99999 Fault history at 2 last trip: 64-bits encoded as Pump-controller four 16-bit Decimal Hours...
- Page 15 2: No service indication on Service LED or FAIL line 3: Service indication on FAIL line One 16-bit Service status word – Service status ?V826 word: Hexidecimal Contact Edwards for more ‡ <0000..FFFF> information Serial numbers: pump; drive-module and ASCII [1..30] String power/control PCA...
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Page 16: Operating The Pump
A73501860 Issue B Table 5 - Error codes Returned error code Meaning Invalid command in current state - e.g. serial command to start/stop when in par- allel control mode Operating the pump 3.6.1 Start the pump To start the pump, send the following command over the serial communications link: Command The reply you receive will be in the following format: Reply... -
Page 17: Multi-Drop Operation
A73501860 Issue B Multi-drop operation Using multi-drop mode, a single computer system can communicate with more than one pump. Each pump must be assigned its own individual address, or node, before it can be fitted into a multi-drop system. The command to assign the multi-drop address is sent in standard message format and is detailed in Section 3.7.1 below. -
Page 18: Assigning A Multi-Drop Address
A73501860 Issue B 3.7.1 Assigning a multi-drop address When you receive your 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. -
Page 19: Mixed Parallel And Serial Operation
A73501860 Issue B Mixed parallel and serial operation You can control the pump using the parallel interface control inputs and at the same time monitor various pump parameters using the serial interface. Alternatively you can control the pump using commands sent over the serial interface and at the same time monitor the normal signal using the parallel interface. -
Page 20: Decoding Status Words
A73501860 Issue B Decoding status words 3.9.1 Decoding system status word If you are using the serial communications link you will be able to access further information that may be useful for fault finding. When you send a query to monitor measured motor speed, the pump also returns a system status word. The send command is as follows: Command You will receive the following reply, where the first returned number refers to motor rotational speed in revolutions... - Page 21 A73501860 Issue B Each binary digit (bit) represents a flag that is either active (state 1) or not active (state 0). To help decode each of the system status words, each bit is numbered (starting with 0 for the least significant to 15 for the most significant), as shown below: ...
- Page 22 A73501860 Issue B Table 8 - System status register 2 flags (continued) Status Flag Active Flat Meas Alarm Fault condition - See 'Fault register' for detail Reserved Reserved Reserved Reserved Reserved Reserved Reserved 15 (msb) Reserved Table 9 - Warning register 2 flags Status Flag Active Flat Meas 0 (lsb)
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Page 23: Decoding Service Status Word
A73501860 Issue B Table 10 - Fault register flags Status Flag Active Flat Meas 0 (lsb) Reserved Over voltage trip Fault due to excessive link voltage Over current trip Fault due to excessive motor current Over temperature trip Fault due to excessive pump-controller temperature Under temperature trip Pump-controller temperature sensor failure Power stage fault... - Page 24 A73501860 Issue B Table 11 - Service flags Bit number Status flag Active flag means Tip seal service due Set when hours until tip seal service due = 0 Bearing service due Set when hours until bearing service due = 0 Reserved Controller service due Set when hours until controller service due = 0...