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Installing Remote Base Controllers—RBCs SIMATIC 545/555/575 System Manual
5.5 PPX:505–6870 RBC
User options, switch settings, status displays, and base address
configuration vary with RBC model. The options for the 505 PROFIBUS-DP
RBC, PPX:505–6870, are described in this section; see Section 5.4 for a
description of PPX:505–6851–A/B and PPX:505–6850–A/B options.
(Series 505 Special Function modules cannot be used in a DP base.)
The following features are user-selectable:
• The state of the output points that are controlled by the RBC after
remote I/O channel communication is lost (jumper selectable)
• RS-232/423 baud rate (dipswitch selectable)
• RBC station address (dipswitch selectable)
• Status display mode (dipswitch selectable)
• Software parameters
When I/O channel communication to a base is lost, the state of the outputs
is determined by the selection made on the RBC jumper E1 (Off/Freeze).
Figure 5-9 shows the location of the jumpers on the RBC.
NOTE: You must make an E1 jumper selection. The RBC Status Display
reports an error if no jumper selection is made.
For discrete output modules, the state of the outputs is determined solely by
the position of the E1 (Off/Freeze) jumper.
For analog/word output modules, the state of the outputs is influenced not
only by the position of the E1 (Off/Freeze) jumper but by the output
module’s Zero/Hold Last Value selection, if the module has that option. See
Table 5-5.
Table 5-5 Analog/Word Output States
RBC Off/Freeze Selection
Analog/Word Module
Zero/Hold Selection
Analog/Word
Output State
Off Zero Zero *
Off Hold Last Value Last Value
Off – no selection – Last Value
Freeze Zero Last Value
Freeze Hold Last Value Last Value
Freeze – no selection – Last Value
*See the user manual of your analog/word output module for further details.
User Options
Output State
Selection
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