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6 Working Principle
The GT200-HT-MT has 8156 bytes of input and output buffers to exchange data. 0 ~ 4999 of the buffer is used for
the HART input data and output data. 5000~8155 of the memory is used for the status of the HART channel and
control variables. The specific assignment is shown in the table below:
Buffer
address
Corresponding
Modbus register
address
Data offset
Read/write
permission
Description
Input/
output
data
0-2999
0-1499
Read
The area of HART
input data
3000-4999
1500-2499
Read/Write
The area of HART
output data
HART
channel
5000-5019
800-809
0-19
Read
Device 0_cmd0 data
5020-5039
810-819
20-39
Device 1_cmd0 data
……
……
……Device 15_cmd0
data
5320
960H
320
Gateway status
5321
960L
321
The number of
sending times of
HART data
5322
961H
322
The number of
receiving times of
HART data
5323
961L
323
Error times of HART
communication
5324
972H
324
The response status of
Device 0_cmd0
5325
972L
325
The response status of
Device 1_cmd0
……
……
……The response
status of Device15
_cmd0
5340-5439
980-1059
340-439
The response status of
user’s commands
5440
1060-1195
Reserved