The automated weighing and batching system is put
into operation at 'Enia' Enterprise, town Kalush, Ukraine. Constituents
of technological process of preparation of glue are:
sequential filling of the hopper by the components
of glue with control of the hopper weight and the weight of
mixing of the components of glue;
pumping of finished product to next production
Metrological certification of the weight measuring
system has been realized, metrological performance has been determined.
Measurement accuracy doesn't exceed 0.05% at whole weighing scale
range (0...6000 kg), that is quite enough for such systems. The
system is approved for operation in accordance with corresponding
metrological requirements and standards.
Destination of the system
The system is intended for acquisition, representation,
archiving and printing information, that permits to operator to
carry out the control for process of weighing and batching of the
components easily in manual mode and to carry out the automatic
batching of the components of glue in accordance with selected recipe.
Purpose of automation is creation of unified hardware-software
solution that permits to perform automated control of technological
process and to provide successful performance of production equipment.
Structure and functions
Hardware-software solution is implemented on the basis
of present-day automation facilities - equipment from Siemens -
programmable logical controller SIMATIC S7-300,
operator panel OP177B, electronic weight
measurement module SIWAREX U plus
strain sensors SIWAREX R (3 ones).
The object of automation is the workshop of weighing
and batching (hopper number 1) with following actuating mechanisms:
feedwater pumps P1 and P2;
product discharge pumps P3 and P4;
component supply valves V1-1, ... ,
chalk supply screw number 1;
mixer M1, motor speed of which is controlled
by frequency converter Altivar
shakers number 1 and 2.
Structure of the automated weighing and batching system
is represented on figure 1.