HRT-710 User Manual (Version 1.24, June/2015) PAGE: 22
4. Modbus Communication
4.1 Module Execution Process
When the HRT-710 module is started, it will enter the
―Initial‖ mode
first and then enter the
―Operation‖ mode.
(1) When HRT-710 runs in
―
Initial
‖ mode, it will execute all initial command
and the ―RUN‖ led will flash.
(2) When HRT-710 runs in
―
Operation
‖ mode, it will execute all polling
command automatically
and the ―RUN‖ led will be always on.
4.3 Modbus / HART Mapping Table
Users can access the HART device by using these Modbus address
defined by HRT-710 module. These Modbus address can be divided into
two parts as below.
(1) Input Data Area (FC04)
(2) Output Data Area (FC06, 16)
[ Table 5: Modbus / HART Mapping Table ]
I
N
P
U
T
D
A
T
A
A
R
E
A
MB_Addr
(HEX)
MB_Addr
(Decimal)
Description
[ User CMD Data ]
0~1F3
0~499
―User CMD― data
[ Module State Data ]
1F4
500L
Module state machine
1F4
500H
Module request command count
1F5
501L
Module receive command count
1F5
501H
Module receive error command count
1F6
502L
Module error status
1F6
502H
Module error command index
1F7~1F9
503~505
Reserved
[ Default CMD(0) Data ]
1FA~200
506~512
―Default CMD(0)‖ input data of ―Module
0
‖
201~207
513~519
―Default CMD(0)‖ input data of ―Module
1
‖
208~20E
520~526
―Default CMD(0)‖ input data of ―Module
2
‖
20F~215
527~533
―Default CMD(0)‖ input data of ―Module
3
‖
Содержание HRT-710
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Страница 32: ...HRT 710 User Manual Version 1 24 June 2015 PAGE 32 Figure 23 MBRTU send and receive data...
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