This document is the instruction manual for MODBUS GasPoint Expansion Module GP-MBUS4.
The BW GasPoint MODBUS Expansion Module, model GP-MBUS4, is an optional add-on card designed for the 12-bit version of the BW GasPoint. It allows the monitor to interface with a MODBUS system using a suitable controller (master device). The module is fully compatible with BW GasPoint Monitors having serial numbers starting with '3-' or higher.
| Communications Protocol | MODBUS RTU slave |
|---|---|
| Baud rates | 1200, 2400, 9600, 19200 bps field selectable |
| Word length | 8 |
| Electrical interface | RS 485 |
| Reception and Transmission | Half Duplex (2 or 4 wire field selectable) |
| MODBUS addressable range | 1-247 |
| Number of devices on network (max) | 32 |
| Supported MODBUS function codes | 3, 5, 6, and 7 |
| Power Supply | Powered by BW GasPoint |
| Power Consumption | <70 mA @ 24 VDC |
The default baud rate setting is 9600.
The default configuration is even parity with one stop bit.
The default local address is 01.