FMC Corporation - Talstar 80 - Handbuch (Seite 48)

Commissioning Proline Promass 80 PROFIBUS PA
48
6.4 Commissioning the PROFIBUS PA interface
!
Note!
• All functions required for commissioning are described in detail in the "Description of Device
Functions" manual which is a separate part of these Operating Instructions.
• A code (factory setting: 80) must be entered to change device functions, numerical values or
factory settings.
The following steps must be carried out in the sequence specified:
1. Check the hardware write protection:
The WRITE PROTECT parameter indicates whether it is possible to write to the device via
PROFIBUS communication (e.g. via FieldCare).
!
Note!
This check is not needed if operating via the local display.
COMMUNICATION
→ WRITE PROTECT…
…
→ OFF displayed (factory setting): write access via PROFIBUS possible
…
→ ON displayed: write access via PROFIBUS not possible
Deactivate the write protection if necessary
→ Page 44
2. Enter the tag name (optional):
COMMUNICATION
→ TAG NAME
3. Configuring the fieldbus address:
Set the bus address:
– Software addressing using the local display:
COMMUNICATION
→ BUS ADDRESS
– Hardware addressing via miniature switches
→ Page 45
4. Select the system units:
• Via the system units group:
SYSTEM UNITS
→ UNIT VOL. FLOW → UNIT VOLUME → UNIT…
• In the SET UNIT TO BUS function, select the SET UNITS function to transfer the cyclically
transmitted volume flow to the PROFIBUS master (Class 1) with the system unit set in the
measuring device.
COMMUNICATION
→ SET UNIT TO BUS
!
Note!
– The configuration of the engineering units for the totalizers is described separately
→ see
Point 6
– If a system unit is altered via local operation, this initially does not affect the unit that is used
to transfer the volume flow to the automation system.
The SET UNIT TO BUS function has to be activated in the COMMUNICATION block before
the altered system unit of the measured value is transmitted to the automation system.
5. Setting the measuring mode:
SYSTEM PARAMETER
→ MEASURING MODE
Select the flow components that should be recorded by the measuring device:
– UNIDIRECTIONAL (factory setting) = only the positive flow portions
– BIDIRECTIONAL = the positive and negative flow components
6. Configuration of the totalizer:
The measuring device has one totalizer.
• You can assign a measured variable to the totalizer via the CHANNEL parameter:
TOTALIZER
→ CHANNEL …
…
→ VOLUME FLOW option (CHANNEL = 273), factory setting: the volume flow is
totalized as the measured variable
…
→ OFF option (CHANNEL = 0): no totalizing, the value 0 is displayed as the totalizer
value