Rae RAEGuard 2 PID - Page 52

RAEGuard 2 PID User’s Guide
47
2. Data Structure/Communication Steps
RAEGuard 2 PID only supports Function Code 0x03 (read-only
registers). The detector only supports value reading.
0x03: Read-Only Register
Requesting Message:
Device
Address
Func-
tion
Code
Register
Address
High
Byte
Register
Address
Low
Byte
Quantity
of
Registers
High Byte
Quantity
of
Registers
Low Byte
CRC
Low
Byte
CRC
High
Byte
Client ID
03
00
08
00
02
CRC
CRC
Answering Message:
Device
Address
Function
Code
Byte
Count
Register Value
CRC
Low
Byte
CRC
High
Byte
Client ID
03
04
Reading
Highest
Byte
Reading
Higher
Byte
Reading
High
Byte
Reading
Low Byte
CRC
CRC
Note: The length of data from the detector is 4 bytes.
Example:
Request: 01 03 00 08 00 02 45 C9
Answer: 01 03 04 00 00 00 D1 3A 6F
Note: The maximum communication distance should be less than 1
km when using a 1.5 mm
2
cable.