GE Industrial Solutions MX150_MX250 Modbus Network Card - Manual (Page 2)

WARNING
Automatic Transfer Switches are often used in critical applications. Failure of an ATS to operate properly could
cause serious personal injury (including death) and property damage. Therefore, extreme caution must be used
when designing or using programming software that will communicate with the ATS . Improper use of the
Modbus network variables will cause the Automatic Transfer Switch to malfunction. Always conduct a full
test and debug of the programming software prior to installing and using it in the system.
GE Zenith Controls disclaims any and all liability for use of third-party application software that
will be used to control the Automatic Transfer Switches.
Disclaimer
Table of Contents
Page
Overview
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0 1
LED Indicator
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0 1
Installation
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0 2
Installation on the Controller
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0 2
Termination Resistor
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0 2
Configuring a Modbus Network Card
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0 2
Testing a Modbus Network
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0 3
CDP Programmable Exercisers
....................................................................................................................................
0 3
CDT Exercisers
........................................................................................................................................................................
3
Operation
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0 4
Setting System Time
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0 4
Operation with In-Phase Monitor
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0 4
Operation Under Battery Backup
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0 4
Appendix A – Read Only Register List
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0 5-12
Appendix B – Read/Write Register List
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13-14
Appendix C – Modbus Network Card
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15
Appendix D – Connections for Configuring and Testing the Modbus Card
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16
Appendix E – RS 485 Multi-Drop Connection
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17
Appendix F – Installation of Modbus Card on Controller
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18
Appendix G – Modbus Protocol Illustration
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19-21
Appendix H – Configuring Controller for Modbus (MX150/250)
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22
Bill of Materials
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23
Components for the Modbus Option ( ZNET 250 M )
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23
Components for the Modbus Card Configuration
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23
Troubleshooting
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24