Our customer, one
of the biggest lubricant supplier in the world, needs
to run their blending plant somewhere in the west java
region. The system consists of two blending unit and
one supporting unit. Each blending unit has a different
product to produce, and capacity of production.
In general, the control system equipped with three
Allen Bradley SLC5/04. Allen Bradley DH+ network is
being use to internetworking the system. For a local
operator interface, Allen Bradley Panel View 550 is
being used, while a Compaq Deskpro EP will act as
supervisory control on the control room. Rockwell
Software RSView32 is being used as supervisory software.
In the upper level, a computer operated by a laboratory
and production supervisor, is being used to send a
blending instruction to the Control Room MMI-PC. Blending
parameter will be automatically transferred from the
upper level computer to the computer. Both computers
connected to the company Local Area Network.
RSView32 running on the control room serves as a
window to the system. RSView32 displays all current
process data in a user’s recognized object, including
alarm and event in the system.
RSView32 Internal Recipe gave the company a reliable
recipe management, although no sophisticated database
system is being used. Recipe is a crucial factor on
the blending unit, because the lubricant quality is
very much depending on the right mixture of the oil
and the additive.
The use of a PLC based architecture with Allen-Bradley
controllers and Rockwell Software provided the following
benefits to the control system:
* Proven reliability of Allen-Bradley and Rockwell
Software
* Local availability of hardware and technical support
* Open system architecture for future system updates
or additions
* Greatly reduced overall system cost
