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S71200 PID Input

Created by: WITLOCK at: 1/6/2015 9:05 PM (4 Replies)

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1/6/2015 9:05 PM	Rate (0)
WITLOCK Posts: 3 Rating: (0)	I need to use the frequency output from HS counter 2 as the input to the PID block. I can not get the ID1004 location (DWord) to convert to a real for input to the PID. I am using an encoder to determine the speed of a sliding door and controll it with the PID block.
WITLOCK Posts: 3 Rating: (0)
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1/7/2015 8:52 AM	Rate (0)
William_B Posts: 5225 Rating: (1182)	WITLOCK I need to use the frequency output from HS counter 2 as the input to the PID block. I can not get the ID1004 location (DWord) to convert to a real for input to the PID. I am using an encoder to determine the speed of a sliding door and controll it with the PID block. Hi. 1. Declare the ID1004 as a DINT in the symbol table. 2. Use the CONV (convert) function setting the input type as DINT and output type as REAL. Helpful? w
William_B Posts: 5225 Rating: (1182)
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This contribution was helpful to 1 thankful Users WITLOCK

1/7/2015 2:52 PM	Rate (0)
WITLOCK Posts: 3 Rating: (0)	Worked out fine, thank you!
WITLOCK Posts: 3 Rating: (0)
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1/7/2015 5:55 PM	Rate (0)
Marko Bursic Platinum Member Joined: 9/8/2009 Last visit: 7/17/2023 Posts: 1410 Rating: (149)	Don't forget to call it with direct access (peripheral) with :P, if you call it in interrupt.Example: ID1004:P

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1/21/2015 10:56 AM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4782 Rating: (123)	New question published byWITLOCK is split to a separate thread with the subject web page in a s7 1200, warning even if I delete Webint:PLCtag or create new project. Best regards Min_Moderator

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