Siemens SIMATIC S7-400H - Communication Functions

Using I/Os in S7–400H
13.2 Using single-channel, one-sided I/Os
S7-400H
System Manual, 03/2012, A5E00267695-11
171
13.2 Using single-channel, one-sided I/Os
What is single-channel one-sided I/O?
In the single-channel one-sided configuration, the input/output modules exist only once
(single-channel). The I/O modules are located in only one subsystem, and are only
addressed by this subsystem.
A single-channel one-sided I/O configuration is possible in the following devices:
● Central and expansion devices
● Distributed I/O devices at the PROFIBUS DP interface
● Distributed I/O devices at the PROFINET interface
A configuration with single-channel one-sided I/O is useful for single I/O channels up to
system components which only require standard availability.
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Single-channel one-sided I/O configuration