72-901-04 Rev A 8/12/2019
Page 2 of 24
Table of Contents
1. Scope..............................................................................................................................................................3
2. Introduction..................................................................................................................................................3
3. Connections and Installation .................................................................................................................4
4. Modbus memory map...............................................................................................................................5
4.1 Relay Status.............................................................................................................................................5
4.1.1 Relay 1 Status.................................................................................................................................5
4.1.2 Relay 2 Status.................................................................................................................................6
4.1.3 Relay 3 Status.................................................................................................................................7
4.1.4 Relay 4 Status.................................................................................................................................7
4.1.5 Relay 5 Status.................................................................................................................................8
4.1.6 Relay 6 Status.................................................................................................................................9
4.1.7 Relay 7 Status.................................................................................................................................9
4.1.8 Relay 8 Status...............................................................................................................................10
4.2 Alarms ......................................................................................................................................................11
4.3 Water Meters .........................................................................................................................................12
4.4 Conductivity Probe Temperature ...................................................................................................13
4.5 4-20mA....................................................................................................................................................14
4.6 Relay States...........................................................................................................................................15
4.7 Digital Input States.............................................................................................................................16
4.8 Configuration Parameters.................................................................................................................17
5. Appendix A: MVEX Model Features..................................................................................................22
6. Appendix B: Updloading ModBus Software to Existing MVEX.............................................223
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