Functions
3.3 Option handling without RESERVE modules
IM151-1 HIGH FEATURE interface module (6ES7151-1BA02-0AB0)
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Manual, 03/2008, A5E01075975-02
Behavior during the first start-up
In the case of option handling without RESERVE modules, the IM151-1 always goes into
cyclic data exchange during the first start-up. However, the I/O device input/output is not
activated until valid information about the options is available from the module. No fault is
indicated externally in this state (BF LED does not light up). The input/output of the I/O
devices is not active in this state. Evaluate the data of the feedback interface in order to
assess this state.
Behavior during a warm restart
Valid information about the options is stored retentively in the IM151-1. During the warm
restart, the IM151-1goes into cyclic data exchange and the input/output of the I/O devices is
activated immediately. If the configuration has changed since the last start-up (for example
incorrect module plugged or information about options is incorrect), the input/output of the
I/O devices is deactivated until the real configuration agrees again with the configured one.
See also
Option handling in general (Page 14)
3.3.5
Controlling and monitoring options without RESERVE modules
Introduction
You can use the control interface (PIQ) and feedback interface (PII) to control and monitor
options by means of the user program.
Recommendation: Before working with the ET 200S optional enhancements, check whether
all the required electronic modules are plugged in using the feedback interface (refer to the
table below). The contents of the feedback interface have to agree with the specifications of
the control interface.
Note
The use of SFCs 14/15 enables consistent access to the control and feedback interface.
