Parker 8903/RS Technical Manual
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Parker 8903/RS Technical Manual

Parker 8903/RS Technical Manual

Communications option
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8903/RS
RS485
Communications Option
Technical Manual
HA469261U001 Issue 1
© Copyright 2010 Parker Hannifin Ltd.
All rights strictly reserved. No part of this document may be stored in a retrieval system, or transmitted in any
form or by any means to persons not employed by a Parker Hannifin Ltd., Automation Group, SSD Drives
Europe without written permission from Parker Hannifin Ltd., Automation Group, SSD Drives Europe. Although
every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to
make amendments or correct omissions. Parker Hannifin ltd., Automation Group, SSD Drives Europe cannot
accept responsibility for damage, injury, or expenses resulting there from.
Parker Hannifin Ltd., Automation Group, SSD Drives Europe, warrants the goods against defects in design,
materials and workmanship for the period of 24 months from the date of manufacture, or 12 months from the
date of delivery (whichever is the longer period) on the terms detailed in Parker SSD Drives Standard Conditions
Parker Hannifin Ltd., Automation Group, SSD Drives Europe reserves the right to change the content and
WARRANTY
of Sale IA500504.
product specification without notice.

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  • Page 1 All rights strictly reserved. No part of this document may be stored in a retrieval system, or transmitted in any form or by any means to persons not employed by a Parker Hannifin Ltd., Automation Group, SSD Drives Europe without written permission from Parker Hannifin Ltd., Automation Group, SSD Drives Europe. Although every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to make amendments or correct omissions.
  • Page 2 Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible...
  • Page 3 Safety Information Requirements IMPORTANT: Please read this information BEFORE installing the equipment. Intended Users This manual is to be made available to all persons who are required to install, configure or service equipment described herein, or any other associated operation. The information given is intended to highlight safety issues, EMC considerations, and to enable the user to obtain maximum benefit from the equipment.
  • Page 4 Safety Information Hazards DANGER! - Ignoring the following may result in injury 1. This equipment can endanger life by exposure to 5. For measurements use only a meter to IEC 61010 rotating machinery and high voltages. (CAT III or higher). Always begin using the highest range.

  • Page 5: Table Of Contents

    Product Order Code....................1 Compatible Firmware.................... 1 Restrictions......................1 Installation....................... 2 Wiring the RS485 System................. 5 Technical Specification of the 8903/RS Option........... 5 Option Connector .................... 5 Cable Specification................... 5 Biasing and Termination................... 7 Status and Activity LED Indications ..............8 MMI Diagnostics ....................

  • Page 7: 8903/Rs Rs485 Option Introduction

    8903/RS RS485 O PTION Introduction This manual describes the Parker SSD Drives’ RS485 Option. Product Features • Suitable for use with 890CD Common Bus Drive, 890SD Standalone Drive and 890PX Drive • 2-Wire RS485 Port • Slave Modbus RTU Protocol •...

  • Page 8: Installation

    Discharge) sensitive parts. Observe static control precautions when handling, installing and servicing this Option. Legacy 890 drive without the STO feature Figure 3. Front of 890 drive showing Control Board fitted Figure 2. 890 showing Control Board withdrawn with Options fitted 8903/RS RS485 Communications Interface...
  • Page 9 2. Press the assembly into the TOP connector (adjacent to terminals X10, X11 and X12) on the Control Board. Ensure that the front panel of the Option overlaps the front of the Control Board. Figure 4. Fitting the connector to the Option 8903/RS RS485 Communications Interface...
  • Page 10 3. Screw the Option in position using the captive screw on the front of the Option. 4. Replace lower blanking plate if no Slot B option is fitted. Figure 5. 890 Control Board with Option fitted 8903/RS RS485 Communications Interface...

  • Page 11: Wiring The Rs485 System

    Wiring the RS485 System Technical Specification of the 8903/RS Option RS485 bus: Isolated 2-wire + ground Receiver input resistance: 12 kΩ (one Unit Load) Differential input threshold: ±200 mV Differential driver output voltage: ±5 V max. Fixed biasing: 10 kΩ pull-down resistor to terminal A 10 kΩ...
  • Page 12 Ground Ground Earthing screw 120O 120O Screen Screen Screen screen screen screen screen * If the 8903/RS is the last node then the on-board terminator (T) may be used instead Figure 8. Alternative RS485 Wiring Configuration 8903/RS RS485 Communications Interface...

  • Page 13: Biasing And Termination

    If an 8903/RS option is at the end of the RS485 bus then this must be terminated. The on-board termination may be used by making the following connections on the X48 connector: bridge terminals A and Terminator T, as shown in Figure 9.

  • Page 14: Status And Activity Led Indications

    - RS485 initialising Green - Receiving frames addressed to this node Flickering - Transmitting frames from this node - Receiving frames addressed to this node with errors detected Flickering - Transmitting an exception code from the node 8903/RS RS485 Communications Interface...

  • Page 15: Mmi Diagnostics

    3 : 4800 4 : 7200 5 : 9600 6 : 14400 7 : 19200 8 : 38400 9 : 57600 10 : 115200 Read Only Range: 8 DATA BITS Number of data bits of a character. 8903/RS RS485 Communications Interface...
  • Page 16 Read Only Range: integer value RX ABORT COUNT Number of received Modbus frames addressed to this node aborted due to excessive inter- character delay. Read/Write Range: False/True RESET COUNTERS Set to True holds in reset all counters. 8903/RS RS485 Communications Interface...

  • Page 17: Modbus Rtu

    Maximum Inter-Character Delay (bits/s) (ms) (ms) 1200 32.08 13.75 2400 16.04 16.04 4800 8.02 3.44 7200 5.35 2.29 9600 4.01 1.72 14400 2.70 1.15 19200 2.00 0.86 38400 1.75 0.75 57600 1.75 0.75 115200 1.75 0.75 *Fixed value 8903/RS RS485 Communications Interface...

  • Page 18: Modbus Data Model

    Modbus bases its data model on a series of tables. The four primary tables are: Discrete Input, Coils, Input Registers, and Holding Registers. The 8903/RS implementation maps the fixed parameters (PREFs) and user defined DSE field bus registers on to both the Input Registers and the Holding Registers.
  • Page 19 Reserved Modbus Functions The 8903/RS option will recognise the Modbus functions given in Appendix B. The 8903/RS will reply with an error response for functions that are recognised but not supported. Received frames with function codes not recognised will be ignored by the option, i.e. an error response will not be transmitted.
  • Page 20 Exceptions The following Modbus exception codes may be transmitted by the 8903/RS option during an error response: Code Name Description - The function code is recognised but the function is ILLEGAL FUNCTION not supported. - Attempting to read or write to a fixed parameter...

  • Page 21: Configuring The Rs485 System

    1. Move the cursor down to select "890 Comms" and select "RS485". 2. Click to select the RS485 block. Move this to where you want on the screen then click again to place the block. Figure 9. Configuration showing RS485 function block 8903/RS RS485 Communications Interface...

  • Page 22: Step 2: Attaching Fieldbus Connectors

    The fieldbus connectors must be added before they will appear in the RS485 function block. The function block and connectors can be renamed by using the right mouse button and Note: selecting Rename Block. Figure 10. Configuration showing RS485 function block and Fieldbus Connectors 8903/RS RS485 Communications Interface...

  • Page 23: Step 3: Configuring The Fieldbus Connectors

    A DSE register may be associated with an input connector, an output connector or both, in which case the input and output connector must have the same DSE type, i.e. VALUE, INTEGER or BOOLEAN. 8903/RS RS485 Communications Interface...
  • Page 24 5. Set up all the DSE registers in a similar way. Right click on a register to reveal a menu that allows registers to be moved, inserted or deleted. 6. Other RS485 parameters may be set up, as shown below. 8903/RS RS485 Communications Interface...

  • Page 25: Initial Dse Fieldbus Register Values

    An input and output connector mapped to the same Modbus register(s) may be used with a persistent block as shown in the example below. This combination allows persistence of data when the power is removed from the 890 drive. 8903/RS RS485 Communications Interface...

  • Page 26: Fb Input And Output Data Types

    (see Appendix A: DSE/RS485 Conversion Rules). Some recommended RS485 type assignments to fieldbus connectors are given in the table below. Fieldbus Connector RS485 Type LOGIC UINT16 INTEGER UINT16 UINT32 INT16 INT32 VALUE FLOAT 8903/RS RS485 Communications Interface...

  • Page 27: Accessing Fixed Parameters Only

    This output could be used with the LOGIC::LOOKUP function block to determine a particular state. LAST TX STATUS Enumerated value: Status Run 0: NONE 1: ILLEGAL FUNCTION 2: ILLEGAL ADDRESS 3: ILLEGAL DATA VALUE 8903/RS RS485 Communications Interface...

  • Page 28: External Control Of The Drive

    LOGIC function block. When Set (=1) is the same as : RUN FWD TRUE RUN REV FALSE NOT STOP FALSE When Cleared (= 0) is the same as : RUN FWD FALSE RUN REV FALSE NOT STOP FALSE 8903/RS RS485 Communications Interface...

  • Page 29: Example Commands

    Not implemented. It is intended to allow the PLC to toggle between local and remote. The state of this must be set (=1) to allow this feature to be added in the future. Example Commands 047F hexadecimal to RUN 047E hexadecimal to STOP 8903/RS RS485 Communications Interface...

  • Page 30: Communications Status

    This bit is set (=1) if the Reference Ramp is not ramping. Internal Limit Active This bit is set (=1) if, while in vector control mode, the speed limit has reached the torque limit; or, while in Volts/Hz mode, the open loop current limit is active. 8903/RS RS485 Communications Interface...

  • Page 31: Appendix A: Dse/Rs485 Conversion Rules

    From INTEGER to INT32 -2,147,483,648 to -2,147,483,648 to 2,147,483,647 2,147,483,647 From INTEGER to UINT16 -2,147,483,648 to 0 to 65,535 2,147,483,647 limits apply From INTEGER to UINT32 -2,147,483,648 to 0 to 2,147,483,647 2,147,483,647 limits apply 8903/RS RS485 Communications Interface...

  • Page 32: Value Type Connector

    -32,768.0 to 32,767.9999 -32768 to 32,767 limits apply/ rounding applies From VALUE to UINT16 -32,768.0 to 32,767.9999 0 to 32,767 limits apply/ rounding applies From VALUE to UINT32 -32,768.0 to 32,767.9999 0 to 32767 limits apply/ rounding applies 8903/RS RS485 Communications Interface...

  • Page 33: Appendix B: Modbus Functions

    Quantity of registers 2 bytes 1 to 125 (N) Response: Function code 1 byte 0x03 Byte count 1 byte Register value N*2 bytes value Error Response: Function code 1 byte 0x83 Exception code 1 byte 02 or 03 8903/RS RS485 Communications Interface...
  • Page 34 Register value 2 bytes value Response: Function code 1 byte 0x06 Starting address 2 bytes 0x0000 to 0xFFFF Register value 2 bytes value Error Response: Function code 1 byte 0x86 Exception code 1 byte 02 or 03 8903/RS RS485 Communications Interface...
  • Page 35 00 12 Return Bus Responds with the CRC error count Communications Error Count 00 13 Return Bus Exception Responds with the exception count Count Other Not supported Responds with error response (Illegal Function) 8903/RS RS485 Communications Interface...
  • Page 36 Response: Function code 1 byte 0x10 Starting address 2 bytes 0x0000 to 0xFFFF Quantity of registers 2 bytes 1 to 123 (N) Error Response: Function code 1 byte 0x90 Exception code 1 byte 02 or 03 8903/RS RS485 Communications Interface...

  • Page 37: Appendix C: Troubleshooting

    DSELite, will report a status of LERROR. The Status LED will flash 50% RED/GREEN (see above). Possible configuration problems are: • An 8903/RS option is fitted without an RS485 fieldbus block in the DSE configuration. No LERROR will be reported, but the Status LED will flash 50% RED/GREEN.

  • Page 38: Disposal

    Do not dispose of in a land fill site set aside for domestic waste. Packaging During transport our products are protected by suitable packaging. This is entirely environmentally compatible and should be taken for central disposal as secondary raw material. 8903/RS RS485 Communications Interface...

This manual is also suitable for:

Rs485

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