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Remote Operation : PA
7ML19985JB02 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL Page 23
Configuration
To configure a PROFIBUS PA Class 1 Master (for example, a PLC), you will need a GSD
file.
The GSD file
The GSD file (SIEM8124.gsd for the 6 m Probe LU; or SIEM8123.gsd for the 12 m Probe LU)
is available from the product page of our web site at:
https://pia.khe.siemens.com/index.asp?Nr=11157
under Downloads.
Setting the PROFIBUS address
When your instrument is shipped, the PROFIBUS address is set to 126. You can set it
locally (see
Setting the PROFIBUS address via the handheld programmer
on page 19) or
remotely via the bus, using a parameterization tool such as SIMATIC PDM (see
Device
Address (default 126)
on page 73).
Bus Termination
Power Demands
To determine how many devices can be connected to a bus line, calculate the combined
maximum current consumption of all the connected devices and allow a current reserve for
safety.
In the case of the Probe LU (PROFIBUS PA), the maximum PROFIBUS current is user-
selectable, and can be either 12, 13, 15, or 20 mA. (See
PROFIBUS Current Consumption
on
page 79.)
Values
Range: 0 to 126
Pre-set: 126
Note: In order for PROFIBUS PA to work properly, it must be terminated at both
extreme ends of the cable. Please refer to the PROFIBUS PA User and Installation
Guidelines (order number 2.092), available from www.profibus.com.
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