6.5.2 Message types in message lists and archives
Message types in message lists and archives
Messages are divided into the following classes:
Term Definition
Operator input messages Operator Input messages are generated when an operator controls
process variables, for example, changes the operating mode of a con‐
troller.
● PCS 7 generates operator input messages automatically if you use
faceplates prepared from the libraries.
● If you are using faceplates in the PCS 7 project that were created
according to the
"PCS 7 Process Control System; Programming
Instructions for Blocks"
documentation, these faceplates can
generate PCS 7‑compliant Operator Input messages.
Process messages Process messages signal process events that take place in the automa‐
ted process, such as limit value violations and operating messages.
● Process messages are predefined for the blocks and therefore do
not need to be configured. Message texts and message priority can
be modified as needed in the object properties for the CFC blocks.
These modifications can also be made centrally in the process object
view or by means of import/export operations.
● Operating messages are a subgroup of process messages. They
signal process values that can be used to evaluate a process-related
component, such as an operating hours counter.
Process control messages Process control messages are generated when PCS 7 detects and sig‐
nals errors in components within its own system. Such errors range from
failure of a component to a wire break message for a connected I/O
signal.
Process control messages are generated by the driver blocks in PCS 7
and do not need to be configured.
System messages
System messages are messages that are triggered by self-diagnostics of a device. System
messages are usually included in the process control messages or process messages
(operating messages).
Message concept of PCS 7
6.5 Understanding messages
Service Support and Diagnostics (V8.2)
74 Service Manual, 03/2016, A5E36200111-AA
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