User's Manual

Table Of Contents
7ML19985JM01 SITRANS LR 460 (PROFIBUS PA) – INSTRUCTION MANUAL Page III-47
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PA: Remote Operation
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 SIEM810F.gsd is available from the SITRANS LR 460 product page on our
web site. Go to https://pia.khe.siemens.com/index.asp?Nr=7427 and click Downloads.
Download the DeviceInstall, and run it from your computer. This will install the GSD file
into your system (as long as you are using SIMATIC software).
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 27) or
remotely via the bus, using a parameterization tool such as SIMATIC PDM (see
Address
(default 126)
on page 58).
PROFIBUS address
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: 10.5 mA for SITRANS LR 200.
Allow a current reserve for safety.
Cyclic versus Acyclic Data
When you request data from a device via PROFIBUS PA, you have two choices. Cyclic
data is provided at every bus scan: acyclic data is requested and provided as needed.
Input information is always requested at every bus scan and is set up as cyclic data.
Configuration information is only needed periodically and is set up as acyclic data.
Note: If you are not using SIMATIC software, you can download the GSD file
separately, and import it with the software you are using.
Values
Range: 0 to 126
Pre-set: 126
Note: PROFIBUS PA MUST be terminated at both extreme ends of the cable for it to
work properly. Please refer to the PROFIBUS PA User and Installation Guidelines (order
number 2.092), available from www.profibus.com
.