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SIMATIC S7 HART Analog Modules
4.8.4 Additional Diagnostic Data Records
Additional
diagnostic data
Structure of the
diagnostic data
records 128 and
129
4-34
The additional diagnostic data provide information on the state of the HART
communication following the last command.
Additional diagnostic data record 128 for channel 0, 129 for channel 1
Additional diagnostic data record 130 for channels 0 and 1: When the
module is switched on, the recognized connected HART field devices and
their identifiers (“tags”) are entered here.
Additional diagnostic data records 131 for channel 0 and 151 for
channel 1 with the data for the identifiers found in the additional
diagnostic data record 130.
The following figure shows the structure of the diagnostic data records 128
and 129.
Byte 0
Byte 1
Byte 2
Byte 3
to
6
Byte 7
Byte 8
Byte 9
7 6 5 4 3 2 1 0
always 0 (“monodrop,” 1 field device per channel)
Number of the last client, if error in HART command
1=module command,
0=HART command
7 6 5 4 3 2 1 0
0
see Table 4-13
HART group error bits
7 6 5 4 3 2 1 0 HART protocol error during
response from field device to
module
see Table 4-14
.
.
always 0, reserved for time stamp
From here onwards: HART status
last command
1. HART status byte and
2. HART status byte, see Technical
Specifications for HART
Fig. 4-16 Diagnostic data records 128 and 129 of the HART analog modules
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04