Preface - Siemens SIMATIC S5 Manual

IP 265

Preface

The IP 265 represents an innovative enhancement of the processing power of the PLC
(PLC=Programmable Logic Control). It is a powerful, freely programmable I/O module and a
member of the range of I/O modules common to the S5-100U, S5-90U/S5-95U and ET 200U
(distributed I/O system).
On the worldwide market of mini and micro PLCs, there is a growing tendency towards faster and
smaller components. In the case of existing mini PLCs of the SIMATIC S5 family, system-dependent
limits are set by processing speed of control commands. The conventional SIMATIC C1, C2, C3
circuitry is therefore still used for expecially fast applications. With this technology, hardware
connections which enable high-speed sub control but are not reversible in the sense of
"programmable" are set up by means of electrical wiring (solder bonds).
The use of FPGA technology in the IP 265 makes it possible for the first time to meet high speed
requirements for sub controls of an overall system with a freely programmable SIMATIC S5
module. Hardware connections are also set up on the IP 265 by loading memory contents into an
FPGA (Field Programmable Gate Array). The hardware connections established in this way enable
parallel and therefore fast sub control of an overall system. The FPGA used in the IP 265 also has
the advantage that the sub control can easily be modified by renewed loading of FPGA-relevant
data.
A special user program (IP 265 user program) must be loaded into the IP 265. There are two
options:
• A program generated to suit specific user requirements or
• Fixed-programmed standard software from Siemens
A special COM (COM 265) is available for free programming of the IP 265.
In addition to the programmable application, the IP 265 also offers the possibility of implementing the
special "timer" function by means of a standard program. Siemens offers a memory submodule with
the standard function counter for the IP 265. It is supplied separately and is not described in this
manual.
The program capacity of the FPGA used in the IP 265 is limited. The IP 265 is therefore used for
high-speed sub controls. More complex sub processes can be controlled with the IP 265 by adding
a further IP 265 module.
Note
In the manual, Section 13 "Sample Applications and Programming Aids" is reserved for program
examples. It enables fast startup of the module without having to read the entire manual.
EWA 4NEB 812 6130-02a
Preface
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