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Siemens Simatic S7-400 User Manual

Page 626

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Glossary

Glossary-20

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Warm restart

This is a reboot after a power failure using a set of dynamic data programmed by
the user and a user program section defined in the system.
A warm restart is indicated by setting a status bit or by some other appropriate
means that can be read by the user program and indicate that the standstill of the
programmable controller, brought about by a power failure, has been detected in
RUN mode.

Wire break

Parameter in STEP 7. A wire break test is used for monitoring the connection
from the input to the encoder and from the output to the actuator. With wire
break, the module detects a flow of current at the appropriately parameterized
input/output.

Working memory

The working memory is a

³

random access memory in the

³

CPU which the

processor accesses during program execution of the user program.

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