Interrupts/Diagnostic Messages; Message And Error Types; Evaluating Errors/Messages Using The Web Server - Siemens SIMATIC ET 200SP Operating Instructions Manual

Interrupts/diagnostic messages

9.1

Message and error types

Three types are distinguished:
Operating errors
Operating errors can occur spontaneously at any time due to an unforeseen event. They
include internal and external hardware problems which can occur spontaneously during
weighing, e.g. wire break of the load cell cable.
Data and operating errors
Data and command errors arise always as response to a command or a data record transfer.
A data error occurs when a plausibility error is identified in a data record sent to the module,
causing the module to refuse acceptance of the data record.
A command error occurs when the module cannot execute the issued command in its current
operating state.
For most data/command errors, the electronic weighing system outputs additional information
for the error. This includes further details about the error and is described in detail in the error
list in this section.
Technology messages
Technology messages occur spontaneously due to the process flow of a weighing/dosing.
Messages provide information to the operator and have no further effect on the dosing
operation.
In the event of an error, the error data record DR32 is read automatically from the WP351 FB
into the CPU. Data and operating errors as well as technology messages remain set to "true"
in DR32 for 3 seconds in each case. Operating errors remain until the error is resolved. It is not
necessary to acknowledge the messages to the electronic weighing system.
9.2

Evaluating errors/messages using the Web server

The electronic weighing system has a message buffer that stores the last 100 entries including
time stamp in non-volatile memory. If the number of messages in the message buffer exceeds
100, the oldest entry is overwritten. The message buffer can be read out at any time using the
Web server (menu item "Read out all data records") and saved together with the scale
parameters. This facilitates the detection, analysis and correction of errors in the system. The
only way to completely clear the message buffer is with the "Load factory settings (11)"
command.
Technology module TM SIWAREX WP351 HF
Operating Instructions, 01/2020, A5E47521010-AA
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