8/25/2009 12:23 PM | ||
Posts: 9 Rating: (4) |
Hi Peter, This my board is measuring NTC resistors and any resistorsand gives the result as pulses, which is counted by Logo digital input. Normal Logo input can count only 4 Hz speed. Fast input can count 5kHz speed. Output of my board can be set by hardwareresistor and capacitor on board. Calculation formula is t1 = 0,693(R1+R2+R3)*C t2 = 0,693 (R3*C) t2 is fixed to 125ms (4Hz) and t1 is changing. Speed can be set high, if you use fast input of Logo. More info, contact matti.niemi@fi.abb.com |
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8/25/2009 1:14 PM | |
Joined: 1/5/2007 Last visit: 4/7/2023 Posts: 1690 Rating: (580)
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Hi Peter, first you must translate the resistance to pulses like Matti or to a voltage (with a R-bridge) or a (0)4..20 mA signal by hardware electronics and then you can measure a voltage 0 to 10 V or (0)4 to 20 ma with the LOGO ..... Best regards Betel |
==> Meine TAG-Listen: "deut." |
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