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Modbus process image in the memory of the COM461MT
30 COM461MT_D00011_00_M_XXEN/05.2013
The assignment of the memory addresses and the associated memory con-
tent is described below.
7.2 Memory scheme of the process image
7.2.1 BMS device address assignment on the Modbus
As illustrated in the table, the Modbus start address for the respective process
image is derived from the BMS device address. 256 (0x100) words or 512 bytes
are reserved for each BMS device. They contain all the information requested
and transmitted from the BMS bus.
Tab. 7.1: Modbus start address for each BMS device for which a request can be sent.
Modbus address ranges of the process images in the
memory
BMS
device
address
Word
HiByte LoByte
00
…
FF
1 0x
01
Device 1
2 0x
02
Device 2
3 0x
03
Device 3
… … …
32 0x
20
Device 32
… … …
150 0x
96
Device 150