Ip 265 Expansion; General Remarks - Siemens SIMATIC S5 Manual

IP 265
12

IP 265 Expansion

The information presented in this section deals only with the particularities of interfacing two IP 265s.
General knowledge regarding operation and startup of the IP 265 have been assumed ( Sections 2
to 11).
12.1

General Remarks

What is meant by "expanding" an IP 265 ?
An IP 265 can be interfaced to a second IP 265 over a special interface (called an expansion
interface). In this way, a second IP 265 can postprocess an IP 265's outputs and intermediate
results. The processing width of the expansion interface is 8 bits.
When is expansion necessary?
Expansion may become necessary when
• the number of digital 24 V inputs and 24 V outputs on one IP 265 or
• the program capacity of one IP 265
is insufficient to control a high-speed subprocess.
What does expansion mean when it comes to writing user programs?
The IP 265 user program is divided between the two interconnected IP 265s. The programs (or
program segments) are recombined into a single IP 265 user program over the special expansion
interface.
Note
It is not possible to use both an expansion interface and IP 265 differential inputs at the
same time.
EWA 4NEB 812 6130-02a
IP 265 Expansion
12-1