Introduction
Software-PLC
A Beckhoff software PLC is controlling
the operational cycle of the assembly line. This system is installed on an industrial PC together with
the TopControl user interface. Thanks to the enormous capabilities of today’s PC systems, this approach
allows even complex high-performance machines to be controlled. The available Ethernet TCP/IP interface
permits easy connection to a customer LAN or remote servicing over the Internet. Moreover, the customer
can continuously benefit from progress in PC technology.
Reusable software
The underlying software complies
with the programming standard IEC 61131-3. It features reusable basic functions like communication with
TopControl, axis and I/O control, error handling, etc. The modular software architecture assures the
optimum integration of customerspecific sequences and processes. Sensors and actuators are simulated,
so that programming work can be divided among several people, as can the testing of process sequences
before the machine is ready for operation.
Fast real-time data bus
The real-time EtherCAT
data bus and the appropriate bus terminals are used as the standard means of peripheral interfacing.
The communication times on EtherCAT are extremely short. For instance, 1000 distributed inputs and outputs
can be scanned in just 30 microseconds. Using bus couplers, the customer can also connect devices with
other bus systems (CAN, Profibus, ...) quickly and easily.
Key features:
- Latest technology available
- High level of user comfort and convenience
- Reusable platform components
- Optimized cost / performance ratio
- Broad range of applications
Operations
High level of user comfort
TopControl is a graphical
user interface employing a touch screen and runs under MS Windows®. It combines the ultimate in user
comfort and data storage with authentic and realistic machine presentation. TopControl can communicate
with the software PLC either via OPC or ADS (Beckhoff).
Each actuator can be individually controlled and checked regardless of the system’s
operating state. This feature allows the system to be put into operation efficiently and reliably. Once
saved, article data can be retrieved again later. This helps to minimize the time needed for changeovers.
The user language can be changed while TopControl is in operation. Extensive sets
of data like article definitions can be entered with the keyboard.
Error messages
If an error occurs, an arrow points
to the part of the machine causing the error. As a result, the errors can be quickly located and remedied
all the faster.
Access rights
A special editor can be used to
adapt the user interface to the needs of each operator. The system manager can determine the extent
of access a user has to machine functions. For instance, he can block or hide certain entry windows
or control keys. This feature protects production and quality specs.
Production data acquisition
Some statistical
functions such as machine availability or good/bad informations are available as standard features in
TopControl. Project-specific article data can be saved and made available to external expert systems.
This feature allows the assembly process to be traced back to the individual parts.
Host computer
An overall system can consist of
several sub-systems, each having their own control system and their own TopControl. In cases like these,
TopControl of the first sub-system acts as the overriding host computer. It handles the central management
of articles and jobs. The resulting assembly systems offer virtually unlimited possibilities.