It is pretty easy to tell you how to get started. You must define your requirementsHow to design a high Speed counter for PLC ?(I'm relatively new to PLC's?)
Thanks in Advance.
Have you been given any requirements or objectives for this project?Thanks for your reply.
Sorry this is my first time posting, and first time using this forum!
I just began my career as a hardware design engineer and my first task is to implement high speed counter for PLC (RX632N- Renesas 32 bit micro controller which as sensors as its input module ). I have the basic idea of PLC and all its block. So I need help on how to get started in high speed counter ,how does it work and what are its blocks and how do i interface it.
Any help would be greatly appreciated.
Excellent point, which is why I am curious to explore the requirements and expectations for this project. I realize that disclosure of company confidential information may be a sensitive issue for a new engineer which is why we need to keep this as abstract as possible for the time being.PLC's in general are not that good for high speed events, although the term high speed is relative, this is due to the scan and data update time.
As a rule, for high speed events in a PLC, a specialized board is used to accomplish this.
It is often the case, as when I worked at Allen-Bradley, that PLCs are implemented with high end microprocessors. In that era (ca. 1992) it was the 80186 possibly in a dual arrangement. One was the IO Scanner and the other was solving the ladder, but I'm not 100% sure about that. They were using μC/OS from Labrosse.I guess I did not read thoroughly enough as it seems the OP, although mentioning PLC, is actually using a high end Microprocessor!
Sure, but the TS (Thread Starter) has not given us much in the way of information. Maybe she will, and maybe not.It is not so much the processor as the method used in just about all the versions I have used and that is they run a scan through the ladder, rung by rung, and record the output status etc, at the end of the scan, the data table is updated and the next scan continues, this is the reason for such things as a PID loop motor controller etc, having their own hi-speed card in a slot.
I suspect the OP is using 'PLC' in a wider sense.
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