Reliance 57C424 MaxPakIII high-speed link

Multi-Tasking Operating System

The AutoMax Software Operating System provides the real-time concurrent operation of multiple programs or tasks on the same processor on a priority basis, while sharing system data and control signals. Though only one task runs at a time on the same processor, the execution of the tasks is scheduled so that each task shares the processor over a period of time. This multi-tasking permits the user’s overall control scheme to be separated into individual tasks which simplifies writing, checkout and maintenance of the application program. Multi-tasking in the AutoMax also reduces overall execution time and provides a faster response to critical tasks.

Multi-Processing Hardware

In the rack based units, internal communications of the AutoMax are based on the widely used and accepted bus structure, Multibus by Intel. Multibus, field proven by years of industrial use, provides a highly dependable base on which to build a very reliable product. By choosing Multibus, Reliance Electric has insured that the AutoMax will meet the demanding requirements of industrial control today and in the future. Utilizing the Multibus standard and the AutoMax operating system allows the implementation of a unique multi-processing architecture in the AutoMax. Multi-processing is a solution to requirements for additional I/O, speed, memory, and processing power in industrial control applications. The AutoMax will accommodate up to four Processor Modules in the Multibus rack along with a Common Memory Module. Other cards such as the Network and Remote I/O Communication Modules, Interface Modules and the general I/O Modules can be inserted in the rack as space permits. The unique feature of the AutoMax multi-processing system is that program tasks are transportable from processor to processor – expansion requires no reprogramming of existing tasks. Memory used to store process parameters and data in any of the Processor modules is accessible by other Processor Modules and this access is transparent to the user.

In conjunction with it’s Multi-tasking Operating System, theAutoMax also provides three separate languages forprogramming, each tailored to a specific need. The LADDER LOGIC language is used for sequencing operations and discrete input/output. It allows the user to program the I/O and internal contacts and coils with easily recognizable names. The CONTROL BLOCK language is used for analog regulation and process control. The blocks are preconfigured control statements that allow the user to easily specify control strategies. The ENHANCED BASIC is used for arithmetical operations, numeric and string handling, and host computer communications. The ENHANCED BASIC tasks link the AutoMax to keyboard and CRT-based operator interface devices. The CONFIGURATION task sets the priority and scheduling of all of the various Ladder Logic, Control Block, and BASIC tasks in the application program and defines al system I/O.

Programming Systems

IBM Based Development Executive Software

DCS Network

56 nodes (1 master, 55 slaves), 1.75 mbaud, Multidrop configuration 3000 ft. with Belden 9259 or equivalent coaxial cable

AutoMax Remote I/O System

Up to 15 remote I/O processors can be installed in each master rack. Each remote I/O network provides for up to 7 remote I/O drops

Allen-Bradley Remote I/O System

Up to 15 remote I/O processors can be installed in each master rack. Each remote I/O network provides for up to 7 remote I/O drops.