Message Frame /Communication Procedure - Honeywell RAE Systems RAEPoint User Manual

Message Frame /Communication Procedure

RAEPoint Host supports Function Code 0x03 only.
a) Modbus® RTU
0x03 : Read Holding Registers
The Requesting Message:
Starting
Device Function
Address High
Address Code
Byte
Client ID 0x03 addr
Note: The max Quantity value is 48.
The aswering message:
Device Address Function Code
Client ID 0x03
Registers Table:
(1) 0x03(Read Holding Registers)
RAEPoint Host supports up to 8 monitors by following system specification. The entire registers
space is divided into 8 blocks, one block register space corresponds a monitor data registers.
Monitors' basic address is located from 0x0000 to 0x031F (#1 basic address: 0x0000, #2 basic
address: 0x0060, #3 basic address: 0x00C0, #4 basic address: 0x0120, #5 basic address: 0x0180,
#6 basic address: 0x01E0, #7 basic address: 0x0240, #8 basic address: 0x02A0, address
length:0x300), step value is 0x60.
Honeywell® RAEPoint |
IMPORTANT!
Starting
Address Low
Byte
addr
Byte Count Register Values
len
User Manual
Quantity of Quantity of
Registers High Registers Low
Byte Byte
qty qty
CRC Low Byte
MSB...... LSB crc
CRC CRC
Low High
Byte Byte
crc crc
CRC High Byte
crc
32