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Messages and Diagnosis
7 Messages and Diagnosis
7.1 Message Types
The SIWAREX MS messages are divided into several types.
The asynchronous messages (see chapter 7.6) can be generated spontaneously
at any time due to an unexpected event. These include internal and external
hardware faults (operating messages) that can occur spontaneously during a
weighing procedure.
The synchronous messages (see chapter 7.5) always originate as a response to
a command.
There are data errors if a plausibility error is determined in a data package that has
been sent to the module and the module rejects that data package. These are
operating errors if the module group in the current operating status cannot execute
the given command.
The status bit (see chapter 5.7.1) are not messages however. The status displays
describe the status of the scale in normal operation and can be monitored or
evaluated at any time.
7.2 Message Paths
The SIWAREX MS messages are passed on to the operator by various paths.
During configuration, it is important to choose the right path for routing and
processing the messages.
Essentially, the messages are processed for two purposes:
•
For display on an operating panel
•
For connection to control software to control certain reactions in a process.
The following message paths are possible:
•
Output message buffer to the SIWATOOL MS program
•
Output to the SIMATIC CPU with the help of the MicroScale library
7.3 Detection of Messages Using SIWATOOL MS
A message buffer is integrated into the module and can hold up to 99 entries. If the
number of messages in the message buffer reaches 99 then a new message will
immediately delete the oldest message. The message buffer can be read using
SIWATOOL MS (menu option "Read all data records") and can be saved along
with the scale parameters. This assists in detecting, analyzing and resolving
SIWAREX MS 7-37
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