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Signal board, 5VDC 200KHZ

Created by: jirk@ at: 2/15/2018 3:03 PM (7 Replies)

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2/15/2018 3:03 PM	Rate (0)
jirk@ Bronze Member Joined: 1/12/2016 Last visit: 11/23/2022 Posts: 42 Rating: (4)	Hi, I have 5V encoder TTL. It is connected to signal board 6ES7221-3AD30-0XB0 - 200 kHz input. I have to count pulses for determine angle of motor/encoder. I count pulses in OB1, but it goes only 1ms fast, so I can reach max. 1 kHz input of signal. How to catch all signals - up to 200 kHz? Any method of interruption? Thanks for tips!

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2/15/2018 3:39 PM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 1/27/2023 Posts: 8584 Rating: (1122)	Hello jirk@, You need to use High Speed Counter (HSC) Have a look in online help or manual S7-1200 Best regards, Wizard

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2/15/2018 3:58 PM	Rate (0)
0_Einstein Diamond Member Joined: 7/7/2010 Last visit: 1/27/2023 Posts: 13080 Rating: (2123)	The digital input the encoder is wired to, reduce the filtering on that to the smallest value possible. Then the 200kHz will work. Looking at the value in an OB is not the right approach except for verifying it works or does not work. jirk@ Hi, I have 5V encoder TTL. It is connected to signal board 6ES7221-3AD30-0XB0 - 200 kHz input. I have to count pulses for determine angle of motor/encoder. I count pulses in OB1, but it goes only 1ms fast, so I can reach max. 1 kHz input of signal. How to catch all signals - up to 200 kHz? Any method of interruption? Thanks for tips!
	science guy
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2/16/2018 7:02 AM	Rate (0)
jirk@ Bronze Member Joined: 1/12/2016 Last visit: 11/23/2022 Posts: 42 Rating: (4)	Wizard: How can I use HSC when I have 5V input? Or you mean to use library/function of HSC for signal board input? huggy_d1:In attach there is setting of DI of SB. Input filter is in minimum time. I have to some way accummulate pulses regardleses of OB cycle. Attachment SB_setting.png (280 Downloads)
	Last edited by: jirk@ at: 2/16/2018 7:04:57 AM
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2/16/2018 12:28 PM	Rate (0)
jirk@ Bronze Member Joined: 1/12/2016 Last visit: 11/23/2022 Posts: 42 Rating: (4)	Hi, here is an update.. I set HW interruption for positive edge of DI1 on SB. In OB40 there is only increment of number. This can count pulses up to 2.8 kHz. If there is greather frequency, some pulses are lost. How can I count 200 kHz pulses? Attachment SB_setting2.png (234 Downloads)

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2/16/2018 12:36 PM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 1/27/2023 Posts: 8584 Rating: (1122)	jirk@ Wizard: How can I use HSC when I have 5V input? Or you mean to use library/function of HSC for signal board input? Hello, Yes you need to use the Library/function of HSC Best regards. Wizard

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This contribution was helpful to 1 thankful Users jirk@

2/16/2018 1:00 PM	Rate (2)
#dP Posts: 2826 Rating: (658)	Hello. Maybe the picture can help a little (see attached). BR Attachment Tips on configuring HSC for SB on S7-1200.png (370 Downloads)
#dP Posts: 2826 Rating: (658)
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This contribution was helpful to 4 thankful Users jirk@ 0_Einstein isoon_v2s smhbyn

2/16/2018 2:52 PM	Rate (0)
jirk@ Bronze Member Joined: 1/12/2016 Last visit: 11/23/2022 Posts: 42 Rating: (4)	#dP Hello. Maybe the picture can help a little (see attached). BR Thanks, it works!

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This contribution was helpful to 1 thankful Users 0_Einstein

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