User´s Guide Power Rail Booster Version 12/2005
Copyright © Siemens AG 2005 All rights reserved. 6ES7 972-4AA02-0XA0 Page 13 of 49
3.3.2 Controlling the "IS-Master" signal
When deploying several nodes with an active interface, customers must set DIP
switches DIP7 and DIP8 in accordance with the following Table.
Active node stationary Passive node stationary
At least one
active node
travelling
With all stationary PRBs
DIP-7Æ ON, DIP-8ÆON
With all travelling PRBs
DIP-7Æ ON, DIP-8ÆOFF
With all stationary PRBs
DIP-7 Æ ON, DIP-8 Æ ON
With all travelling PRBs
DIP-7 Æ ON, DIP-8 Æ OFF
Only passive
nodes
travelling
With all stationary PRBs
DIP-7 Æ OFF, DIP-8 Æ OFF
With all travelling PRBs
DIP-7 Æ OFF, DIP-8 Æ OFF
(Factory default setting)
Fig. 2: Setting of DIP switches for controlling the "IS-Master" signal
If the structure of the Power Rail network is a "point-to-point connection", as
described in Chapter
4.3.2, you must set DIP switches DIP-7 and DIP-8 to "ON" on
both the stationary and travelling PRB.
3.3.3 Diagnostic Message
Using DIP switch "DIP-6", users can choose between two diagnostics modes.
• DIP-6 Æ „OFF“: The electronic signalling contact maps the behaviour of the
SF-LED as described in the Table in Chapter
7.1 "Diagnostic
Displays of the Power Rail Booster"
For a detailed description of the behaviour and assignment of the signalling contact
refer to Chapter
6.3.2 “Interfaces and Connections".
• DIP-6 Æ „ON“: The system reports detected errors via the electronic
signalling contact as a serial message frame. This allows you
to make a more exact differentiation between the causes of
errors.
For a more detailed description of the diagnostics message frame refer to Chapter
7.2 "Diagnostics message frame".
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