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DI8 High Speed Module

Created by: MS1981 at: 7/3/2012 11:02 AM (6 Replies)

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7/3/2012 11:02 AM	Rate (0)
MS1981 Silver Member Joined: 4/14/2010 Last visit: 9/18/2023 Posts: 514 Rating: (11)	Greeting, Could you explain please is any model available in S7-300 series for high speed counting i want to connect inductive sensor with Simatic high speed/digital input module which have Switching frequency 0 ... 360 Hz I know CPU314C have 4 high speed counting input but i need 8..>> Thanks, Regarded
	MS
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7/3/2012 1:08 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 9/27/2023 Posts: 12153 Rating: (2624)	Hello Sarfraz; You would require the FM 350-2 8-channel counter module: http://support.automation.siemens.com/WW/view/en/29008499 Hope this heps, Daniel Chartier

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7/3/2012 1:15 PM	Rate (0)
MS1981 Silver Member Joined: 4/14/2010 Last visit: 9/18/2023 Posts: 514 Rating: (11)	thanks for message have Switching frequency with resistive load, max. 500 Hz with inductive load, max. 0.5 Hz is inductive load mean inductive sensor..???? can i use following Module..?? 6ES7321-1BH10-0AA0 SIMATIC S7-300, DIGITAL INPUT SM 321, GALVANICALLY ISOLATED, 16DI, 24 V DC, 1 X 20 PIN, 0.05 MS INPUT DELAY HIGH SPEED SUPPORTED Thanks, Regarded.
	Last edited by: Sarfraz Bhatti at: 7/3/2012 1:18 PM MS
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7/6/2012 2:54 PM	Rate (0)
MS1981 Silver Member Joined: 4/14/2010 Last visit: 9/18/2023 Posts: 514 Rating: (11)	can i use following Module for high speed counting..?? 6ES7321-1BH10-0AA0 SIMATIC S7-300, DIGITAL INPUT SM 321, GALVANICALLY ISOLATED, 16DI, 24 V DC, 1 X 20 PIN, 0.05 MS INPUT DELAY HIGH SPEED SUPPORTED Thanks, Regarded.
	MS
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7/7/2012 5:45 PM	Rate (0)
Wishme Experienced Member Joined: 8/20/2009 Last visit: 12/14/2022 Posts: 80 Rating: (5)	Dear Sarfraz, For the module MLFB # 6ES7321-1BH10-0AA0, HIGH SPEED means the switching (0 to 1 and 1 to 0 detection)time is higher than other DI modules. It can measure fast switching signals. If u want to use DI module for counting application than u have to calculate the scan time of your CPU program.CPU scan time should be higher than your measured frequency at the input channel. Otherwise some counts will be missed. In comparision to this method, FM-350 has it own processor to measure and store the no. of pulse arrived per second (frequency). So, the CPU does not have tobother about all the processing of the pulses. I hope based on this u are able to make a decision. Thanks, Vishp .
	Vishme. Hang on...may be we drop a step before Success.
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7/9/2012 7:37 AM

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MS1981

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Joined: 4/14/2010

Last visit: 9/18/2023

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Dear VishP,

Many thanks for message can i use 6ES7321-1BH10-0AA0 Module with 6ES7315-2EH14-0AB0 CPU315-2PN/DP its processing times as following..???


for bit operations, min.	0.05µs
for word operations, min.	0.09µs
for fixed point arithmetic, min.	0.12µs
for floating point arithmetic, min.	0.45µs

7/16/2012 3:23 AM	Rate (0)
Wishme Experienced Member Joined: 8/20/2009 Last visit: 12/14/2022 Posts: 80 Rating: (5)	Dear Sarfraz, Check the Scan cycle time of your CPU with full program download and CPU in Run mode. You can check this online from ...../Module information/Scan cycle time/..... Thanks, Vishp.
	Vishme. Hang on...may be we drop a step before Success.
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Created by: MS1981 at: 7/3/2012 11:02 AM (6 Replies)

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Last edited by: Sarfraz Bhatti at: 7/3/2012 1:18 PM

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