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Simon

MVP 2014
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Simon last won the day on November 28 2018

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About Simon

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    http://www.colterlec.com.au

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    Unitronics Distributor

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  1. Simon

    Activation in UniStream

    Perhaps this is incentive to power up and test before heading to site? However I know there will be situations with remote sites and urgent breakdowns where this feature will be a major pain *if* it is made mandatory. There is the option of using a mobile and an app, but there are still some parts of the world where there is no mobile phone coverage. We have customers who like to put PLCs in those places. It's always a challenge doing dubugging over the phone when the person on site needs to walk (or drive) 10 or 20 or 30 or ??? minutes from the PLC just to make a phonecall. I notice in the link above: "At present Activation is not mandatory, and will not restrict the controller’s operation. Activation may be made mandatory at a future date."
  2. Yep, understood. You could email support@unitronics.com, let them know you already have the distributor working on it, and also copy the distributor. That way you don't get two lots of people working on the same problem and you can get some direct feedback on any technical points that Unitronics may be able to add.
  3. Just on your question of a "direct line" - the sort of question you are asking about batch QA issues has both commercial and technical implications, so your supplier/distributor would be the best contact as they can handle both aspects. It sounds like that is already happening. In general terms you could email support@unitronics.com (or use the support portal) to communicate the technical issue to Unitronics, but the resolution is likely to still involve your local supplier/distributor. I hope that helps,
  4. Wow, really thorough testing! It looks to me like a hardware fault. It does happen, out of the thousands of units I have sold, I've seen maybe 2 or 3 with that specific problem. Before I worked with PLCs I worked with single board computers, and saw similar (rare) problems with them. My prediction is that no amount of software testing and resetting will fix this. But happy to be proven wrong (for your sake) ?
  5. The status information is accessed using a ladder function in the V700. From the help file: I found this topic by searching "v700 ethernet" in the help.
  6. Hi JJ, I have a few questions: * When you say it is connected to Port 2 of the V570 - do you mean COM2? Does the thermocouple have a Serial/Modbus interface? * The post by Flex727 is correct, the E2B snap-in module doesn't take thermocouple inputs directly. It would need a signal transmitter, typically this converts the thermocouple interface to 4...20mA current signal. If you have a datasheet for the thermocouple and/or any photos of the device and the way youhave it wired up, please post.
  7. Just managed to help a customer get the UniStream talking to an SMC EX600 module via Ethernet/IP. The original post above was helpful, so thank you @Pista :-)
  8. I've just encountered the Run Idle as well. Looks like it is an optional 32-bit header from some google searches I have done. I did find some additional details in the UniStream help file by searching for "idle":
  9. U90 Ladder shows the +/- 10V notation, so I would say that is definitive. For the record, the IO-AI2-AO4 expansion module also has +/- 10V outputs (Jazz does not support expansion modules).
  10. Simon

    Linearizing Analog Input

    With UniStream you don't need to use the linearisation block, the analogue input configuration does it for you. See details below, this will scale the 4...20mA input to 0...10,000 as an integer value. There is no need to understand the min/max range of the digital input (or output) word (of course you still need to know if the hardware resolution is high enough to measure the value accurately). Set up the analogue input hardware config as follows: The only downside to this is that the scaling is a literal constant - you can't vary it during run-time. You can still use the X1, X2, Y1, Y2 method and linearisation block if you need the flexibility as it will allow you to use variable tags as your linearisation points. You might do this if you wanted to do field calibration in the PLC. BTW, when you first open the properties box above, the "To" field shows the range based on the native resolution of the analogue input (for example 14-bit = 16383).
  11. As above, the resolution will not prevent you from getting a reading. You mention 2-wire transducers. Firstly just work with the Oxygen transducer, as I assume it is a 3 or 4 wire device? I would expect the Jazz to read it fine. If you are including the 2-wire devices in the IO wiring they may be interfering with the readings. Also when you say you "couldn't get the measurement" what does that mean exactly? Was the value 0, 1024, 32767? Did it vary at all when the oxygen level varied, even if it was the incorrect value? With the 2-wire devices, the Unitronics PLCs do not provide loop power for 2-wire analogue transmitters. You will need a power supply for loop power and the best way to do this is to use an isolation module with loop power capability.
  12. Are you doing anything special with screen jumps, for example using ladder functions to jump between HMI screens? It sounds like the unit is flipping between HMI screens.
  13. Simon

    Safety contact on outputs

    I would make a couple of comments: This is not good practice for safety engineering. The way you have it, the PLC is in between the safety contacts and the downstream equipment. For example, if the PLC failed (for any reason) and put 24V on the outputs (say from an internal short circuit), the safety contact would have no effect. A better circuit would place the safety contacts *after* the PLC outputs, and yes you would then need 3 contacts. I say this is a "better" circuit, but it still may not be the correct circuit for your application. You would need to check your local safety regulations and follow all requirements of those regulations. With the problem you are experiencing with comms loss, I suggest it would be an EMC disturbance resulting from the sudden loss of power to the PLC output circuit and/or the drive it is controlling.
  14. FWIW, a "proper" RJ45 to DB25 convertor isn't a "get out of jail free" card. It might help hold things together but you still need to know where the pins are going. As Ausman said, testing is key and the basics are RX, TX and Ground, and turn off hardware handshaking. If you can't turn off hardware handshaking then a loopback is needed on the handshake lines.
  15. Simon

    Windows 10 Pro

    The Jazz contains a built-in USB to Serial convertor.
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