rotork CK Series User Manual

Profibus Installation Manual
14
Single and Dual Data Highway Configurations
4.3 Redundant Systems – Simple Redundancy
The Simple Dual Channel Profibus DP Option Card version has
two redundant communications channels. Like the RedCom
version, this card supports two types of redundant operation.
• SR – System Redundancy
(One common slave address)
• FR – Flying Redundancy
(Two slave addresses offset by 64)
The Simple Dual Channel card is suitable for all
PLCs where redundant highways are being used.
This option does not report the extended
diagnostic bytes relating to the card’s
redundant status.
These two connection options allow for redundancy
protection against either a failure of the highway (SR mode)
or failure of the card interface channel (FR mode). Most dual
channel systems use two highways and one connection to
each, so the most common use for this card is in SR mode.
The functionality and provisions of the card are identical to
the RedCom version except in the way the card reports its
status on the highway.
There are a number of PLC systems, including older PLCs,
that do not have the ability to use the RedCom system
and as a consequence they are likely to report errors when
connect to a RedCom compliant card. If the PLC does not
support the RedCom standard then the Simple Redundant
card must be used.
Control System Master
Redundant Slave
Interface Card
Actuator
Probus
Primary Slave Backup Slave
Probus
Fig. 7: Profibus DP Simple Dual Redundant Option Block Diagram
The Profibus DP Simple Dual Channel card includes:
• Two Profibus Connections, Channel 1 and Channel 2
• Selectable FR/SR mode
• No Extended Diagnostics
A Simple Dual Channel card can be altered to a RedCom Dual
Channel card, or vice versa, by entering the appropriate value
in parameter 15 in the GSD file.
A4US
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A4
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A4

rotork CK Series Specifications

General

Brand	rotork
Model	CK Series
Category	Controller
Language	English