Task - Siemens SIMATIC S7-1200 Manual

1 Task

Task
1
Introduction
In the packaging industry, containers are to be filled with a specified number of
pieces (e.g. of wall anchors), calculated by weight control.
Before the actual filling, it can be selected via a recipe selection, what (which wall
anchor diameter) and how many are to be filled. Apart from the allowed weight
tolerance for the packaged goods, the recipe also includes the individual weight of
a wall anchor. This can be determined via a teach function, based on the arithmetic
average of a counted sample, and be saved in the recipe.
The packaging weight is tared to 0 before filling. The filling process opens two
sliders. One opens/closes the storage container with the goods to be packaged.
The second limits the filling speed (fast/slow). When reaching the specified
threshold (e.g. 90% of the weight setpoint), the filling speed is lowered by the
second slider. This prevents overfilling. When the calculated weight setpoint
(pieces x individual weight) is reached, the second slider is also closed and filling is
completed. Underfilling is not permissible.
Subsequently, a quality assessment is to take place. The packaged goods will pass
the quality control if the filling weight is within the tolerance specified, it not, it will
not pass.
In the course of this quality assurance measure, the goods are to be clearly
identified and all relevant data, including time stamp is to be logged.
It shall be possible to import the log data to Office Excel. The automation of the
logging process and the integration of the required components into the existing
infrastructure of the packaging system are to be possible.
It must be possible to apply the check for completeness of the packaged goods
also to other products with different content without extra work.
The packaging system is to be operated and maintained exclusively via an HMI
device. Operation is to be possible in German and English.
The recipe data is to be edited via remote access through a control station.
Accepting the changed data is then again to be done via the operator panel.
Weighing, Controlling and Logging (Set 6)
Entry ID: 82454336, V2.0, 10/2017
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