Configuration/project engineering
9.2 Configuring
SITRANS P DS III with PROFIBUS PA
162 Operating Instructions, 06/2013, A5E00053276-07
The status provides information on:
● Usability of the measured value in the application program
● Device status, e.g. self-diagnosis or system diagnostic
● Additional process information, for instance process alarms
The status code consists of one letter and a three-digit number. The letter stands for:
Table 9- 4 Example status code
Configured measured
value source
G_141 8D Electronics
temperature, output
Good,
lower alarm limit
Lower configured alarm limit
violated.
Correct error through
user program.
U_071 47 Output Unsure,
last usable value,
value constant
Input condition "fail safe" is
fulfilled, the parameterized
safety setting is set to "keep
Check the data
measurement.
B_011 0B Secondary variable 3 Bad,
not connected, value
Variable is not calculated, Correct the "transmitter
type" setting.
Overview of status codes (Page 185)
Besides status information, the device can also actively send information about its own state.
Diagnostics are important information which an automation system can use to initiate
corrective measures.
To transmit diagnostic information, the standard mechanisms of the PROFIBUS DP are used
and messages are actively sent to the class 1 master. PROFIBUS DP provides a protocol to
transmit information to the class 1 master with a higher priority than the user data.
The content of the "Device state" parameter from the physical block is sent, along with
information about whether a state change (event incoming/event sent) has occurred.
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