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Table of Contents
PREFACE........................................................................................................................ 2
Table of Contents................................................................................................................ 3
1 Serial Communication ................................................................................................ 4
2 Baud Rate.................................................................................................................... 4
3 Parity bit...................................................................................................................... 4
4 Start and Stop Bits ...................................................................................................... 4
5 Electrical Interface Standards ..................................................................................... 4
6 XVG/eXVG Modbus Communication Default Settings............................................. 5
7 Protocol....................................................................................................................... 5
7.1 General Modbus Frame....................................................................................... 5
7.2 Modbus Transactions.......................................................................................... 6
7.3 Modbus Register Types ...................................................................................... 6
7.4 Modbus Functions............................................................................................... 7
7.4.1 Read Registers (0x03)................................................................................. 7
7.4.2 Write Single Register (0x06) ...................................................................... 8
7.4.3 Write Multiple Registers (0x10)................................................................. 9
7.4.4 Diagnostics (0x08) (Loopback) ................................................................ 10
8 Connections............................................................................................................... 10
8.1 RS-232 Connection (for XVG/eXVG with RS-232 interface)......................... 11
8.2 RS-485 Connection (for XVG/eXVG with RS-485 interface)......................... 11
9 XVG/eXVG Modbus Parameters ............................................................................. 11
9.1 Setup Parameters............................................................................................... 11
9.1.1 General Setup Parameters......................................................................... 12
9.1.2 Position Interpolation Parameters............................................................. 17
9.1.3 Stroke Position Parameters ....................................................................... 19
9.1.4 Pressure Ratio Parameters ........................................................................ 19
9.1.5 CdA-Pressure Ratio Parameters................................................................ 20
9.1.6 Flow Limiting Mode Parameters .............................................................. 23
9.2 Real Time Parameters....................................................................................... 24
10 Write Modbus Application ................................................................................... 31
10.1 Real-Time Status & Parameters Upload Procedure.......................................... 32
10.2 Accessing Fault Records Procedure.................................................................. 33
10.3 Change Gas Constant R and K Procedure ........................................................ 34
10.4 Download Parameters ....................................................................................... 35
10.5 Re-Assign Device Address Procedure.............................................................. 35
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