Samson 3730-4, Mounting And Operating Instructions

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On using the Profile 3.01 the DIAG_EXT bit can be set when the measured value status has
be assigned to BAD_DEVICE_FAILURE. This only happens when the following errors, which
lead to device failure, occur:
4
Test calculation
4
Fatal error
4
Program loading error
4
No production calibration
4
Hardware
4
i/p converter
On using the “Condensed status and diagnostic messages“ extension, the assignment can be
selected as required.
The first four bytes of the manufacturer-specific diagnosis are used for diagnostic alarms ac-
cording to Profile 3.01. On using the “Condensed Status and diagnostic messages“ exten-
sion, these condensed diagnostic alarms are also included in these bytes. The manufac-
turer-specific diagnosis listed in the table below is transmitted in the eleventh byte and above.
The contents of both parameters of the Physical Block, DIAGNOSIS and DIAGNOSIS_EXT,
are sent.
Standard diagnosis according to Profibus DP
Regardless of whether the positioner was integrated according to Profile 3.01 or using man-
ufacturer specifications, the diagnosis can be restricted to six bytes. For this purpose, the
FEATURE_SELECT parameter provides the option “Use DP standard diagnosis (6 bytes)” (see
page 136).
The default setting causes the positioner to provide a manufacturer-specific diagnosis of 26
bytes and a diagnosis of 14 bytes according to Profile 3.01.
Octet Bit Explanation Note
1 0…7
Standard slave diagnostics
2 0…7
3 0…7
4 0…7
5 0…7
6 0…7
EB 8384-4 EN
105
PROFIBUS-PA communication