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Interfaces to automation systems
8.1 PROFIBUS DP interface
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
131
Safe operation
For safe operation of PROFIBUS DP note the following points:
●
Observe the general PROFIBUS guidelines for installation.
●
When installing the SITRANS SL as the only analyzer, or as the last analyzer in a
PROFIBUS DP network:
–
Ensure to switch on the terminal resistor on. The switch is found next to the screw
terminals in the receiver unit.
●
When installing the SITRANS SL on a PROFIBUS DP network, where there are
subsequent devices:
–
Ensure to switch the terminal resistor off. The switch is found next to the screw
terminals in the receiver unit.
–
As the SITRANS SL connection cable will be a stub wire of the PROFIBUS DP
network, keep the length of the stub wire as short as possible and verify that the total
length of stub wires is not exceeded in the network for the baud rate used.
8.1.2
Device data base files (GSD)
PROFIBUS DP requires files for cyclic data transmission which you can download from the
SIEMENS internet support site (
http://support.automation.siemens.com
)
siem815b.gsd
( 9 KB)
DP independent language
siem815b.bmp
(18 KB)
Bitmap Device
8.1.3
Technical data
PROFIBUS DP (according to EN 50170)
Baud rates: 9.6, 19.2, 93.75, 187.5, 500 kBit/s, 1.5 MBit/s, 3 MBit/s