PLC makes simultaneous use of four CPUs
June 2002
PLCs, DCSs & Controllers
The simultaneous use of up to four CPUs - a completely new feature - gives Mitsubishi Electric's Q significantly improved control, monitoring and diagnostics functionality, compared to its predecessor. The new technology gives Q the power to handle the growing demands of modern automation systems while dealing with the need for integrated communications technologies like Internet access, FTP servers, e-mail and SMS. On the control level, the new multiprocessor technology makes it possible to assign discrete tasks to as many as four CPUs for systems with significantly higher execution speeds and availability.
The ability to integrate CPU types with different performance and features in a single system enables precise configuration of the controller for the needs of the individual application. In addition to its other benefits, this makes the new Q a cost-effective multiprocessor solution.
The CPUs have efficient self-diagnostics functions that identify system errors and can also store chronological error histories for later troubleshooting and analysis. This provides additional reliability and effective production with less down time. The integrated RS232 (115,2 Kbaud) and USB (12 Mbaud) ports provide faster performance for transferring and editing PLC programs and speed up the controller's monitoring and diagnostics functions.
Compact dimensions
35% smaller than its predecessor, 12 modules and the module rack together measure 98 x 439 x 98 mm. This results in savings of valuable space in the switchgear cabinet. A complete system can include up to seven expansion module racks, up to 8,192 I/Os and up to 64 modules.
Motion controller integration
The new Q can achieve full integration of control and drive system applications. The PLC and motion controller may be installed on a single module rack and control up to 128 axes simultaneously.
Integrated IT technology
Mitsubishi Electric has also designed the new Q to function as a service station in the manufacturing process. The web server feature makes a series of powerful new functions possible, including remote maintenance and diagnostics and automatic error messages via e-mail and SMS. The FTP server function provides direct access to the Q controller, enabling the efficient remote exchange of program data. For example, a technician could change the recipe for an application from a distant location or another system level, instead of having to do it directly in the same works.
Online change
Cycle times and the reduction of down time are becoming more and more crucial in today's age of just-in-time production. The new Q caters to these needs with its advanced Online Change function, which allows users to exchange parts of the control program while the system is in operation, thus reducing the time required for retooling and system set-up.
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