ABB DX581-S 1SAP284100R0001 S500 I/O module
The RTU560 can optionally be equipped with a
Programmable Logic Control (PLC) software
package. This allows sequential control or closedloop application functions that are processed in
parallel to the telecontrol activities.
The PLC programming package fully complies to
the IEC 61131-3 programming standard. The modularity of the RTU560 in hardware and software
allows PLC programs to be run either on the same
CMU central board,parallel to the telecontrol task,
or on a separate CMU central board used only for
the PLC application.PLC programs have access to
all process signal values as well as the process signal qualifiers such as invalid,time,etc..PLC programs running distributed applications may use the
qualifiers for secure and safe operation.
PLC programs update the process signal values via
the process data interface. The telecontrol task will
be informed about changes and updates the new
output values either to the process output boards
or via the communication line to the network control centers and subdevices.
PLC programs are developed by a powerful PLC
programming tool MULTIPROG® wt.
The PLC package allows programming in the programming languages defined in IEC 61131-3:
• Function Block Diagram (FDB)
• Ladder Diagram (LD)
• Sequential Function Chart (SFC)
• Instruction List (IL)
• Structured Text (ST)
The function block RTU library contains function
blocks to interface with the process I/Os values,
attributes and qualifiers. Additionally it is also possible to create user-specific function blocks or
functions for various applications.
PLC functions
Benefits:
• No need of additional PLC systems
• Flexible method to adapt to customer
specific requirements
• Reduced education cost due to compatibility to IEC 61131-3 programming standard

Mechanical Layout
Depending on where the RTU560 is used,it is not
always necessary to support multiple communica tion links.The RTU560 concept allows the configu ration of three types of RTU.
• The Standard RTU560A
• The Compact RTU560C
• The Economic RTU560E
The Compact RTU560C allows a maximum of two
CMU main boards to be plugged into a standard
I/O subrack. The standard version is one CMU
main board with one or two links to the NCCs or
one NCC link and one link for IEDs.The residual
part of the I/O subrack can be used for I/O boards.
The Compact RTU560C also supports the full
volume of I/O boards distributed over the four
peripheral I/O bus segments.
If more communication lines are required,the Stan dard RTU560A must be used.One or two central
communication subracks can be used with their
full range of flexibility and configuration capabili ties.
The Remote Terminal Unit RTU560E is an integral
part of the remote terminal unit RTU560.It is well
suited for applications with small and medium sized datapoint volumes,for instance in local net work stations or in small distribution substations.
Due to the compact design and the flexible confi guration possibilities the RTU560E is suitable for
centralised or de-centralised system architectures.