Veris Industries LDRA6 USER GUIDE - Manual (Page 6)

Table of Contents User Guide: LDRA6
ii 970 484-6510 www.rletech.com ii
Appendix A: Modbus Communications ..................................................................................................................... 16
A-1 Modbus Implementation of the LDRA6....................................................................................................... 16
A-1.1 Modes of Transmission ..................................................................................................................... 16
A-1.1.1 Slave Address Field ................................................................................................................ 16
A-1.1.2 Function Field ......................................................................................................................... 16
A-1.1.3 Data Field................................................................................................................................ 16
A-1.1.4 Error Check Field.................................................................................................................... 16
A-2 Packet Communications for the LDRA6...................................................................................................... 17
A-2.1 Read Output Registers ....................................................................................................................... 17
A-2.2 Read Input Registers.......................................................................................................................... 18
A-2.3 Present Single Register...................................................................................................................... 19
A-2.4 Present Multiple Registers................................................................................................................. 19
A-3 RTU Framing ............................................................................................................................................... 20
A-4 Modbus Mirroring ........................................................................................................................................ 21
Appendix B: Troubleshooting .................................................................................................................................... 22
Appendix C: Technical Specifications........................................................................................................................ 23