Rae RAEGuard 2 PID - Appendix A: Range, Sensor and Related Configuration; ModBus;RS-485 Information

RAEGuard 2 PID User’s Guide
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14 Appendix A: Range, Sensor and
Related Configuration
The following table shows the measurement range and related
configurations for four different DigiPID sensor modules:
Sensor
(ppm)
Resolution
(ppm)
Span Gas
Setup
Default
Value
Default Alarm Setup (ppm)
Low Alarm High Alarm
0-100
0.01
10
10
20
0-1000
1
100
10
100
15 ModBus/RS-485 Information
The RAEGuard s communicates by means of MODBUS RTU. All
monitors provide a 4-byte register value. Note: Gas concentration is
the only value that can be retrieved.
For example, 34 hex = 52 decimal
Overview
This document describes the modbus protocol used in RAEGuard 2
PID products.
1. Communication Setting
Communication Mode: RTU
Controller: PC or Controller
Client: RAEGuard 2 PID
Baud Rate: 4800, 9600, 19200
Client ID: 1 to 99 (0x0001 to 0x0064)