Kikis

Very good job!

Geia sou Panagioti, You need to make sure that the PLC 0V is connected to 0V of your VFD analog input. If yes, then you might need to isolate the loop via a signal conditioner like the one below: http://www.aliexpress.com/item/Electrical-Isolation-Signals-Isolation-DC-to-DC-Isolation-Transducers-Signal-Conditioner/2028180427.html I had a similar problem in the recent past and i also asked for help in the forum. http://forum.unitronics.com/index.php?/topic/2532-m90-analog-out-to-inverter-drive/?hl=lenze#entry8735 The problem was not solved until i replaced the VFD with a new one from another manufacturer!

Just another alternative solution.. SB3 (1 Second pulse) is on for 500mS and off for 500mS. If you "OR" the positive and negative transition contact of SB3 you will get a pulse every 500mS.

Geia sou Panagiwti, I have successfully completed similar applications in the past. Since the PID process should be based on temperature measurement, your temp. sensor input ( For example a K-type thermocouple) would be the PID process input. I think the easiest way to control a VFD is to use an analog output. In the PID configuration, set min PID output register to 0 and max PID output register to 4095 (This is for 12-bit analog output) Then just run PID process and store the PID result value to your analog output linked register. In case you choose the analog way, you need to check your VFD's analog input requirements and select PLC hardware that suits your application. Another option is to use a communication protocol like Modbus RTU but of course you need to make sure that your VFD supports this Feature. In this case, you set 0 to Min PID output and 500 to Max PID output register (If this is the resolution for 0-50Hz of your VFD) and then write this value to the frequency setting address of your VFD. In any case, your minimum ouput value might not be 0Hz and maximum value might not be 50Hz. It depends from the application, i just gave an example.

I posted this on July 2012. Now we have the EXF-RC15 module and this is one of the reasons that we love Unitronics!!

Hi cara, This is to control a stacking unit attached to an injection molding machine. The problem is that for some molds, the whole unit should be rotated by 180deg and moved to the opposite side of the machine. In this case and if Jazz controller was panel-mounted, there would have been not enough free space between the machine and the stacking system's control cabinet. As a result, it won't be possible for the operator to access the HMI. Another reason for using a "hand-held" controller is when you need to have direct eye contact with something you are controlling but this is not possible if you don't have freedom of movement.

In general, it's better to use models with no on board I/O such as the V130-33-B1. Multi-core cables needed to wire the I/O's require more space resulting to bigger enclosure size selection.

I found Joe's Suggestion very interesting so i tried it with a JZ10-11-PT15, a pair of cheap drawer handles and a plastic enclosure. Not aesthetically pleasing but very practical! https://imageshack.com/i/ewCFYTd7j

Hi Guys, I think it would be great if the analog input expansion modules have 10VDC accurate voltage output. It could be used for example as a reference power supply for linear distance transducers (Pots). Hope to see something like this in the future! Kikis

Hello, First of all you need to know that In order to be able to upload the project to your PC and make your changes to the code, program must have been downloaded using "burn" option. If not, then project upload is not possible. But even if upload option is possible, it might be protected with a password. If you can't upload the project for any of the reasons above, you will need to create a new program from scratch and over-write the existing program. To upload/download a project you need to have the MJ10-22-CS25 programming cable and a usb to rs-232 converter. Hope this Helps!

Hello, To increment values of keypad entry operands using up/down arrows, enable up/down arrow mode in the property window of each HMI element. To scroll between pages with left/right arrows, link SB 51 and SB 52 to a jump condition for a screen in "links and jumps" configuration. Hope this Helps.

Eventhough PTO function is open loop, i find it to be very accurate for a stepper motor application. I think that PTO is much easier and faster way to program. Of course Joe's suggestion is the answer to your question but this way you have to write everything from scratch. If your application is complex, it might be a headache to program.

Geia sou Panagioti, I can think of two ways to solve this problem.. 1) Link a memory bit to disable mode property of all touch elements of your HMI screen. When your "Clean screen" button is pressed, use a timer to turn on this memory bit for a preset amount of time. This way you disable all your HMI elements on the screen. So even if you touch an element, it will be ignored. 2) When "Clean screen" button is pressed, load a blank screen which will stay active for a preset amount of time. When this time elapses, load your previous screen. Note that when you touch an empty area for 4 seconds, PLC enters info mode. You can increase this time by changing the value of SI 50 at power-up (Its value is 4 by default) to avoid entering info mode. Hope this Helps!

Do you use linearization function to set the analog output value (0-4095)? If yes, double check that Y1,Y2 register values are correct.

Joe what is your opinion of using MOV's instead of diodes across the inductive coils?

All vision controllers support e-mail but enhanced vision models support additional features. There is a special topic for e-mails in the help file and there are also good project examples available which will be helpful for you.

Hi Wimzwart, You can find an example on the following links: http://imageshack.com/i/0mow0vj http://imageshack.com/i/5nogifj

Hi mckruger, You can use modbus RTU to communicate with the 2nd V1040. It's very easy, just spend some time to watch the Unitronics webinar about Modbus. http://www.unitronics.com/support/webinars/modbus

EDIT BY MODERATOR: Kikis CAN NO LONGER SOURCE THIS UDFB, SO THE POST IS BEING REMOVED BUT THE LABEL RETAINED IN CASE SOMEONE IS REFERENCING IT SOMEWHERE.

Ofir, thanks for your prompt reply. I think that the linearize option should be added to the properties window of the "Numeric box" command (As it is in Visilogic and U90). It really cuts programming time and it's much more ergonomic. Also it would be great if you add the formula command in the the math toolbox (As it is in Visilogic).

I also can't find the linearization option in the properties window of the HMI numeric entry. I am missing something or do i have to write it in ladder using the linearize command included in the math toolbox?

I tried everything but i didn't manage to get it work! I also connected the +10v of the card directly to speed reference signal. Normally this should force the drive to run the motor continously at 50Hz... But it doesn't work again! The drive is made by an unknown chinese manufacturer and the manual is written only in chinese language. Since the motor is just 2hp, i already installed a new Lenze drive and it works like a charm!

Dear Simon, Thanks for your reply. Yes I tried to run the PLC with 24VDC supply from the inverter's terminal card but it does not work. I connected 0V of the PLC analog out to inverter's analog ground. Before connecting the +- 10v analog output to inverter's input, i measure with multimeter and everything is ok. When i connect +- 10v analog output to inverter's input, i get a very high dc value and inverter does not work.

Hi guys, I have a retrofit project for a small packaging machine using a M90-TA2-CAN. Among others, i want to control the speed of a 3-phase motor using a 0-10VDC analog output. The machine is already equipped with a Frequency inverter drive and the speed is adjusted by a 1K potentiometer. Now the customer prefers to adjust the speed via HMI... The drive has a +10V and ground source which passes though the pot and the wiper result is connected to speed reference terminal. There is no terminal for my 0V PLC analog output and therefore i can't use the analog output of my M90. Any ideas how to solve this problem? Thanks in advance, Kikis