Hart Operating Data Records - Siemens SIMATIC ET 200iSP Operating Instructions Manual

Appendix
A.6 HART operating data records
• The response data record must always be read in full as the data record can be changed by
the I/O module after it is first read with a successful or error status.
If the processing status in the response data record indicates "successful" or "error", the data
record contains current response data or fault displays.
• The client may only write a request data record to the I/O module again when it has read the
response to the previously written request data record via the corresponding response data
record. Otherwise, the response from the I/O module is overwritten.
• The STATUS component in the response frame (HART device status in the response data)
provides information on whether errors have occurred and, if so, which errors.
Each request is stored on a channel-specific basis, and the corresponding request data record is
locked. Another writing of the same request data record is thus not possible and is
acknowledged with BUSY.
The disable of the request data record is reset after the termination or completion of the
requested HART command.
A.6.2

HART operating data records

Reading/writing data in RUN
HART operating data records are transmitted to the module with the "WRREC" instruction and
read from the module with the "RDREC" instruction.
Errors during transmission are indicated at the output parameter STATUS of the "WRREC" or
"RDREC".
The following HART operating data records are available:
Data record
number
80
81
82
83
84
85
86
87
121
131
132
133
134
148
149
452
Description
HART job channel 0
HART response channel 0
HART job channel 1
HART response channel 1
HART request channel 2
HART response channel 2
HART request channel 3
HART response channel 3
HART variables
HART parameter channel 0
HART parameter channel 1
HART parameter channel 2
HART parameter channel 3
HART directory
HART feature data
Length Writable
(bytes)
240 Yes
240 No
240 Yes
240 No
240 Yes
240 No
240 Yes
240 No
320 No
8 Yes
8 Yes
8 Yes
8 Yes
17 No
3 No
Operating Instructions, 11/2022, A5E00247483-AK
Readable
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ET 200iSP