I/O configuration variants
4.7 Connecting redundant I/O to the PROFIBUS DP interface
CPU 410-5H Process Automation
80 System Manual, 09/2014, A5E31622160-AB
F-module in standard mode
F-module in standard mode
Redundant AO dual-channel
You cannot use the module in redundant operation for applications in hazardous areas.
A firmware update is not possible in redundant operation.
Online calibration is not possible in redundant operation.
See Manual
ET 200M Distributed I/O Device; HART Analog Modules
stall the F-ConfigurationPack for F-modules.
The F ConfigurationPack can be downloaded free of charge from the Internet.
You can get it from Customer Support at Download of F Configuration Pack
(
http://support.automation.siemens.com/WW/view/en/15208817)
Quality levels in the redundant configuration of signal modules
The availability of modules in the case of an error depends on their diagnostics possibilities
and the fine granularity of the channels.
Using digital input modules as redundant I/O
The following parameters were set to configure digital input modules for redundant
operation:
● Discrepancy time (maximum permitted time in which the redundant input signals may
differ). The specified discrepancy time must be a multiple of the update time of the
process image and therefore also the basic conversion time of the channels.
When there is still a discrepancy in the input values after the configured discrepancy time
has expired, an error has occurred.
● Response to a discrepancy in the input values
First, the input signals of the paired redundant modules are checked for consistency. If the
values match, the uniform value is written to the lower memory area of the process input
image. If there is a discrepancy and it is the first, it is marked accordingly and the
discrepancy time is started.
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