Siemens SIMATIC PCS 7 CPU 410-5H User Manual

Supplementary information
15.14 Other options for connecting redundant I/Os
CPU 410-5H Process Automation
296 System Manual, 09/2014, A5E31622160-AB
The sample program is based on the fact that following an access error on module A and its
replacement, module B is always processed first in OB 1. Module A is not processed first
again in OB 1 until an access error occurs on module B.
Note
The
MODA and IOAE_BIT variables must also be valid outside OB 1 and OB 122. The
ATTEMPT2 variable, however, is used only in OB 1.
Figure 15-26 Flow chart for OB 1

Siemens SIMATIC PCS 7 CPU 410-5H Specifications

General

Brand	Siemens
Model	SIMATIC PCS 7 CPU 410-5H
Category	Controller
Language	English