Status of the device and measured values
4
Checkback
Refer to section 4 for device status.
4
Status
Each process value is assigned a status according to the PROFIBUS-PA Profile.
Status of reference variable (hex):
0-3f
40-7f
80-bf
Bad
Uncertain
Good
Refer to section 5 for measured value status.
3.1 GSD files and automatic ID number adaptation
The General Station Description file (GSD file) is included in the scope of delivery for every
PROFIBUS positioner and supplies all information required for the cyclic exchange of process
data (setpoint, status, etc.) with the host system and for configuring the PROFIBUS network.
Each positioner and its GSD file has a unique ID number (ident number) assigned to it. This
allows the host to check the compatibility between the configuration in the system and the
actual device.
8 KH 8384-4 EN
Cyclic data exchange
Fig. 2 · Replacing positioners with automatic adaptation of the ID number
Host system,
e.g. BPCS, PLC etc.
GSD
0688
Exchanging positioners
Compatibility mode active
Works as Type 3785 Profile 3.0
with ID number 0688
Compatibility test
Expects Type 3785 Profile 3.0
with ID number 0688
Type 3785 Profile 3.0
ID number 0688
Type 3730-4
ID number 071D
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