Product category:
Mid-range and Large PLCs
News Release from: Siemens Automation and Drives | Subject: Simatic S7-300 controllers
Edited by the Engineeringtalk Editorial
Team on 20 June 2003
CPUs advance compact controller
technology
Six new compact CPUs for Simatic S7-300 controllers feature a series of new functions and improved performance.
Siemens Automation and Drives (A and D) has equipped its six compact CPUs for the Simatic S7-300 controllers with a series of new functions and improved their performance Floating-point commands are now executed in one-third of the time, which shortens the cycle times in mathematical operations
This article was originally published on Engineeringtalk on 6 Mar 2001 at 8.00am (UK)
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Direct access to the faster hardware counters achieves substantially improved dynamics in positioning tasks.
An increase in the number of function calls and data blocks makes it easier to use programs of other Simatic CPUs for the compact CPUs.
With communications per Profibus Standard DPV1 it is also easier to integrate third-party devices into Simatic automation solutions.
A user program can now be unambiguously allocated to a Micro Memory Card to ensure effective protection against copying.
The compact CPUs for Simatic S7-300 are equipped with integrated I/O and provide onboard technological functions such as counting, controlling, positioning and frequency measurement.
Typical applications include standard and special machine building of machine tools and production machines - for instance in the automotive, packaging and food industries.
Micro Memory Cards (MMC) of up to 8Mbyte can store even larger Step-7 projects and data volumes.
Interrogation of the MMC serial number during program execution provides effective protection of application software.
Technological functions have been optimised as well.
Actual values for instance are acquired faster through direct access to input addresses.
This is especially advantageous in counting and frequency measurement functions.
The adjustable maximum counting frequency filters out higher frequencies.
This renders the counting function less susceptible to external interference.
The acquisition of analogue values through the integrated analogue inputs has also been made more robust, so that faulty measurements can be largely excluded.
For positioning per integrated analogue outputs, the trigger modes +/-10V, 0-10V and digital direction signal have been added.
As a result, a frequency convertor such as the Micromaster 420 can be directly triggered.
Delivery of the new compact CPUs is scheduled for the third quarter of 2003.
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