Chapter 4
– Integrated Diagnostic PROFIBUS slave
4. Integrated PROFIBUS diagnostic slave
The WP-3000 master may be equipped with a diagnostic slave
(DS). Besides the transparent transmission path the WP-3000
gets therefore its own DP address.
The diagnostic slave allows you to measure the transmission
path. The software provides the PROFIBUS master with a
variable containing internal values and conditions of the
transmission path. More information can be found in chapter
6.
4.1. Performance limits
Please observe the following performance limits:
The number of PROFIBUS DP slaves is limited to
4 (model 3706-4) and 7 (model 3706-7).
The number of radio receivers is limited
If you use PROFIBUS Master OP/AG/PG the delays
can increase. Please optimize your list of transmitted
variables correspondent to the Siemens recommends
Radio links are in principle factor 1000 slower and less
robust compared to a cable link
Ask yourself: W hat is the effect in the application in case
of loosing data updating for 1 second? If you expect
critical effects tell us this in your inquiry
