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Found 9 results

  1. Hi all. For a few years, I have been using the HSC frequency measurement on the V350. My program uses the example that was given by Unitronics and I have not altered it much. Suddenly, my programs have stopped working when I download them to a new PLC. The HSC behaves unusual and gives me false readings. My program is to control micro water turbines and it uses HSC to measure the frequency of the generator. I am using a simple frequency converter that gives me pulses into my HSCO port. The pulses are 50Hz and I confirm using a digital meter that the input receives 50Hz. In the hardware setting, I define my input in the HSI(RELOAD) tap that my counter target value is 50 and I enable Reload on startup (See Hardware setup in attachment). Now in the ladder program, I define the "Frequency Measurement based on HSC" function block as shown in the picture. When I run the program on my V350 I receive signal to my input and the actual HSC value is incrementing. I can see the number goes 50 steps for about 1 second so it's counting right (50Hz gives 50 pulses). But my frequency seems to be off from the function block. See this video: https://streamable.com/ovzps I measure about 62.11Hz with the function block. The status message for the Frequency block jumps between 0 and 16. Zero means normal behavior but there's no explanation on what 16 means in the manual. Now if I change the Permissible delta (C-in the function block) to RAW measurement and start it again, this happens: https://streamable.com/tbt24 The counter slows down (lags) and I measure about 10Hz, and that makes no sense. Should I not receive about 50.00Hz? out of the function block? I tried to change PLC, tested on SAMBA and I am experiencing the same thing. What am I missing. The only thing that has changed (I think) is that I updated the Visilogic software and the firmware on the PLC. A test program is at the bottom if you want to see it for your self. Thank you Cheers, Arnor HSC_Test.vlp
  2. Hi all, I'm new to this forum and wish to pick the brains of anyone that could suggest a fix for a very unusual problem is occurring on a vision 570 with v200-18-E3XB snap in. We have built 5 identical machines that are essentially batch fillers using the vision 570 with V200-18-E3XB. All machines have identical programs. We have a flow meter that pulses out 1 pulse for every gram of product or about 25 pulses per second. we feed this pulse into the HSC and totalise until the desire value is reached . simple! except one of the machines counts for a while , say a minute or two, then the plc decides to stop counting. the counting doesn't just stop , it ramps down to zero over a period of say 5 seconds. when this first occurred I check the wiring from the flow meter to the plc with a digital counting multi meter and all was good . It was then I noticed one of the connector block on the digital inputs wasn't all the way in . about 2 mm out . I pushed it in and the problem disappeared. problem solved I thought! but the the problem has come back and the connector blocks are all seating well. has anyone come across bad soldering on connections of input terminals on this product or know what else it could be ?
  3. Hi everyone! Is there any way to reset the MI associated to an HSC input by software? The problem is that if I don't do that, it will overflow. Thanks in advance, Gonzalo PS: I'm using a V350
  4. Hello all, I have an application with length measuring using encoder and HSC on V130-TR20. A want to drive(activate) a servo motor (paper cutting knife) always on counter reload for which I'm using _Interrupt HSC 2,3. But VisiLogic does not let me use PTO blocks inside interrupt (illegal element on interrupt subroutine) and do not let me call a subroutine (illegal element on interrupt subroutine). Any suggestions how to activate PTO in the same time while counter reload occurs?
  5. Hi, I opened U90 help files by mistake instead of Vision help files , and found that for HSC it says "Counter value is an integer with a range of -32768 to +32767. After the counter reaches the maximum value of +32767 it will continue to count in the negative range. " I couldn't find similar statement in VisiLogic help files. Now, I plan to use Vision controler V430, and in Technical Specifications for V430-J-TR34 it says that hardware counter has resolution of 32-bit. Does that mean that I can link ML to high speed inputs and they will count to 2^31? I am using two shaft encoders if it's of any matter. I wasn't even thinking about this question, but since accidentally I looked at U90 help it's been bugging me.
  6. I am trying to use an Interrupt HSC with a V130-33-B1 and a Ex-D16A3-TO16. when I try to upload the project to the PLC I get a message saying that Interrupt HSC is not compatible with my hardware configuration. I have looked all over documentation to find out if this is true or if i have something else configured incorrect, but have come up blank. Can anyone confirm that HSC on an expansion is not compatible with the interrupt? I know that immediate routines are not compatable with the V130-33-B1 but there is nothing about the interrupt.
  7. I just bought a V130-33-B1 and a EX-D16A3-TO16 expansion module for a project. I need to set up a HSC Interrupt but the project tells me that the hardware configuration is not supported. there is not documentation anywhere that says HSC interrupts are not supported with the 33-B1 is this true? I know that Immediate elements are not supported on expansion modules. Can anyone confirm or offer a work around?
  8. I am using a IO-D16A3-RO16 and have 3 flow sensors I need to attach, I have two attached to the HSC and want to know if possible and how to do it, is connect the other flow sensor up to a standard digital input? The flow sensor can give a max pulse rate of 73.33 pulses per second.
  9. I have a M91-2-R1 to make some test. I want replace Fusion counter by the plc for a winder. The counter have a encoder 100PPR. When the count reach Preset 1 the motor jog at X speed and when he reach the preset 2 he stop the motor for cutting the material. In the U90 software the are samples of HSC. But I don't see where can I put the number of PPR of the encoder?
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