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Frequency in counter module

6/28/2006 3:30 AM	Rate (0)
Neophyte Posts: 8 Rating: (0)	Hi ! Came across that the frequency in FM 350-1 in 200kHz. What exactly does that means?
Neophyte Posts: 8 Rating: (0)
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6/28/2006 5:27 AM	Rate (0)
Siemen-Stains Posts: 101 Rating: (0)	this tells me that the digital input of the counter module (encoder for example) is able to manipulate the internal counter register of the module, at up to 200,000 cycles per second.
Siemen-Stains Posts: 101 Rating: (0)
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6/28/2006 11:10 AM	Rate (0)
Neophyte Posts: 8 Rating: (0)	Great and thanx. Does it mean that if per second there are more than 200,000 pulses at the input of the counter module, it will not be able to count it ? Then again, I have also seen that for encoders there are the following inputs ( A, A bar, B, Bar, N, N bar) or simply ( A, B, N*) What are these - are there any sites that shows how a PLC interprets the inputs from an encoder?
Neophyte Posts: 8 Rating: (0)
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6/28/2006 12:57 PM	Rate (0)
Chris Silver Member Joined: 8/31/2005 Last visit: 12/15/2025 Posts: 217 Rating: (41)	Hi! Maybe Chapter 9 "Encoder Signals and Their Evaluation" in this manual: SIMATIC FM 350-1 Function Module helps you.
	Greetings, Chris
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7/11/2006 6:43 PM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 12/16/2025 Posts: 2198 Rating: (331)	[quote user="Neophyte"] Does it mean that if per second there are more than 200,000 pulses at the input of the counter module, it will not be able to count it ? YES, but more correctly isto say "Up to a frequency to 200kHz the modul will be able to count the signals, over 200kHz it may loose some pulses. With much higher frequencys than 200kHz itwill lose pulses.)

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