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About Trevor

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  1. Mr T I got the HSO all set and running but I've noticed that the output frequency is not constant (+/- 5 Hz deviation). Could this be a result of noise? I'm struggling to set up a HSC for frequency measurement. The signal being measured is a 2V p-p square wave that won't exceed 3 kHz. I understand that the voltage must be greater than 3V to be read as a logic '1'. For testing purposes I set up a 5V p-p on the HSC0 (pin 15) with the signal's ground connected to the PLC common but no frequency output is generated in the code. Any recommendations? Regards Trevor P.S. Your assumption was correct.
  2. Hi there, I am working on a project that will use a V350-35-TRA22 Unitronics PLC. My current problem is to get a 6V 1 kHz PWM signal on one off the HS outputs. The spec sheet indicates an output frequency range of 5-200kHz, but i can't get an output higher than 100 Hz ( cycle time value = 4, duty cycle = 500 ). I have tried to set the cycle time to 0.4 (to get 1 kHz) but it seems that I can't enter a fractional value. Any help with regards to this problem will be appreciated. Thanking you in advance, Trevor Pieterse B.tech Electrical University of Johannesburg
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