Since Profibus-DP ten years ago when European
birth, by its advanced performance, the convenience use, the
application efficiency but rapidly is accepted by the general
manufacturing industries user, until now always occupies each kind of
field bus application quantity the first big share. Day by day
was in recent years prosperous along with the field bus control
system, impels the Profibus-DP technology unceasingly to develop, not
only was allowed to disperse connects in scene I/O center controls the
room, simultaneously should put the tradition under the control duty
which carried out in the master station transfers to from the war
equipment, thus realized in the true significance distributional
control system.
Under when introduction and advantage the FOPLC system
application maintains freshness in front of the milk in some
large-scale dairy product factory, the yogurt production line the
handling equipment control, the realization partial disperser
controls, the whole common control application case.
This factory maintains freshness the milk, the yogurt production
line for the daily production 200 tons large-scale production lines,
first processes partially including receives the milk, the Pakistan
type sterilization, awaits loading, 混料, the mold mushroom spawn
expands cultivates, the fermentation isotropically,/has been cold, the
CIP clean, consumes energy with the output examination and so on 12
subsystems, the production line 占地 50×100 rice, more than 1,200
I/O spot. The user to the control system request is: All
I/O condition may control the room centralism monitoring in the
center, the Pakistan type sterilization, awaits loading, CIP cleans
three important 地子 systems realizations display control, the
overall system advanced version and the efficiency pay equal attention
to, has the development to cause the spare parts spare parts not to
rely on a Yu supplier. With advantage when company in view of
user demand solution. The system network by Profibus-DP, the
master station uses Simens PLC the S7 - 400 series, PLC the S7 - 400 functions is formidable, sufficiently
completes more than 1,000 controls tasks; Box separately
installs by Profibus-DP the connection 22 partial I/O nearby each
subsystem equipment, maximum limit reduces the electric cable amount
used. Pakistan type sterilization, awaits loading, CIP is three
belts from station connection PLC, separately carries out this
subsystem control task, and will control in the condition information
to pass on the master station, three from will stand PLC respectively
to bring to touch the screen to take the man-machine contact surface. The use from stands PLC to be allowed to cause this
subsystem the control not because of the network chance failure but
the engine off, avoids wasting the precious dairy product resources.
In this system I/O and from stands PLC completely uses with the
advantage when company's FOPLC series. This kind of choice
brings two profits for the user:
First, avoids using the overseas brand product to
cause the system price excessively to be high;
Second, FOPLC may use the STEP 7
programming languages, is same with S7-400, the user does not need to
spend extra manager to study.
This project smooth implementation had proven FOPLC may and any
has the Profibus authentication through the Profibus-DP main line and
Simens the product to be connected, and greatly expanded the DP main
line function, in the realization true significance field bus control
system. The Profibus-DP technology is and when the advantage the
company grasps one of core technologies, in DCS and PLC widespread
application, caused the FOPLC system to stand in the center small
scale control system market with the overseas famous company on the
identical starting line.
"This set of systematic use made us truly to understand
the national brand technical strength", the responsible system
approval work technical personnel appraised like this, "in the
performance was allowed to compare favorably with with the overseas
leading product, the price then fully considered the national
condition, in addition with advantage when company's prestige
guaranteed, this kind of cooperation should become the model which
between the domestic different profession famous enterprise
cooperated." |
