kratmel

Thanks for the tips. I tried different solutions and eventually found the easiest in my opinion. The only problem that arose was the pause (best tested = 3s) I had to add to ensure that the analog outputs could be restarted. During this pause, I load on the screen text "Program is loading...". P.S. I studied the hardware of a faulty PLC. I found that during the cold start there is no CLK signal coming directly from the PLC processor to the DAC. Only a reboot with some delay causes the desired signal to appear. That is, the PLC must be replaced with a new one.

Translate: The 30 days of the trial version have passed and now I can't register it. Gives an internet connection error or proxy failure. I send a screenshot with the error. Thanks. Please send this quastion to support@unitronics.com

Thanks Flex. I will try to implement your idea with RTC.

Thanks for manual. I find this info on arduino forums, maybe you can run your sensor by use some data from this two topic. https://forum.arduino.cc/t/measurement-of-nox-can-bus/352960/2 https://forum.arduino.cc/t/controlling-automotive-nox-sensor-with-can-bus/540699 Please scroll programs. You can find J1939 message for start sensor.

I pointed out that after turning on the power PLC does not activate the analog outputs. Second restarting the PLC by turning the power off and on is also a cold start, but it helps to get the PLC back to work. The time works here - if i turn it off and wait 2-5 minutes - the analog output will not start again. Actually, I tried to restart the PLC through the info mode and through Visilogic - it help to activate analog outputs. Therefore, the main question is how to evaluate first cold start and second hot restart. That is, to find a sign by which to limit the number of hot restarts after turning on the power to one.

Hi, In one of metal bending machine V130-33-TA24 PLC used for control backgauge positioning. Machine work without problem 2020-2022. One of two present analog output used for 0-10V vfd speed control. Now I found problem with both analog output after machine cold start. No output = 0V present when machine started and operator try to do homing proces (no speed setpoint present on VFD analog input). All digital input, output and encoder HSI work without problem. After reload firmware, reset&init, blank project download and reload machine aplication project - no succes. Visilogic V9.8.65 and firmware used for progaming application in 2020. Power supply is changed to new one. I was able to investigate that a hot restart of the PLC (power off and on or reset via Visilogic) returns the operation to normal and the machine can work. If PLC (or machine) is disabled for 5min analog output not start, restart needed. I turned to support and received an answer about a hardware problem in the PLC. Unfortunately, in the current situation in Ukraine, I can not replace the PLC with a new one. I had to make a operator power switch for the PLC so that the machine could work. However, I think this is dangerous because the operator may accidentally turn off the PLC while the machine is running. Now I have an idea to implement a software restart of the PLC using SB300. However, after experimenting with different options for software restarts, I usually get either a generator that constantly restarts the PLC or a restart does not occur. I ask users of the forum for tips on how to restart the PLC after turning on the power, but only once without the use of external circuits. I feel that there is a simple solution, but have not yet found it

Hi, Two tips for you about NOx not start. 1. Average current on NOx =1.5A. Peak current can be above 10A (typical 6-10A) for internal PWM in cold condition. Than you must use above 10A PS or battery for sensor power. 2. In ManualNox on the last page present Start Code. Maybe it must be programmed in Request tab of J1939 FB. If it possible, please post all pages of sensor manual.

Yes, this is exactly the option I was talking about. In practice, the position number can be selected by inputs or by communication network. As I mentioned above, the signals that need to be transmitted from the frequency converter to the PLC are "movement completed in the desired position", "frequency converter in good condition", if necessary, you can transmit more errors of the frequency converter.

https://support.unitronics.com/index.php?/selfhelp/view-article/sae-j1939-communication-protocol

However, this is why you have more customers. Your high-quality projects show your skills and experience.

I try to find info about your absolute encoder with embedded CANopen. https://www.nord.com/media/documents/bw/ag_0100_en_3216_screen.pdf In this manual present CANopen encoder feedback commisioning and on p.69 present info about possible preprogrammed fixed position (63 for 530E VFD). I think best way to control this application is operate with preprogrammed in VFD fixed positions. Then in PLC you can use 4 bit binary coding for 16 absolute position changover. In this case no modbus connection needed. One problem - find way (parameters on VFD) for fixed position program and switch via VFD logic input and program logic VFD outputs - in position, VFD ready (OK). P.S Yes you can program and change current positions via fieldbus (CANopen, MODBUS). But it is not easy way. p.p.s Second VFD positioning must be controled with two proximity sensors?

Great, than you can find info about Modbus communication in this PDF. Please post some info about needed control algo and maybe we can find solution for your system. P.S. Thanks for info about NORD drive modbus update. I found this problem in the past (500 series) and must migrate to Lenze drive and CANopen.

Unistream side not support Profibus. You can use one of embedded to Unisream protocol, please find all possible on Unitronics site https://www.unitronicsplc.com/unistream-series-unistream7/#1449515771593-63d974b6-05ac1451602511853 Or try to find some protocol converter But i think change inverter to the upper model needed. I do not know about your application. Maybe use Unitronics Servo product is the best way.

Hi, i look for some manuals and find https://www.nord.com/media/documents/bw/bu0050_gb_3111.pdf As i see MODBUS RTU is supported on SK540E and bove - please see p.61. USS protocol implemented on SK 530E is like Siemens Profibus. Not supported by Unistream. You must ask NORD support about 530E communication, but i think only CANopen is possible to use with Unistream.

Unfortunately, now I do not have the opportunity to tell you in more detail. I'll try to do it later. However, you should now try to read the instructions and start the connection of the NORDCON program with the frequency converter. This is important for further connection to the Unistream.

Do you have installed NORD commisioning software and run connection to VFD? Is it VFD control panel present on your test station?

Nord frequency converters have a specific command structure for control. Some settings are configured only from the local control panel. Please send the full marking (nameplate fotos) of NORD frequency converter and the type of motor and encoder.

So, as I understand it, Adam has to read data from the V570 RS485 (or RS232) and broadcast it to the Ethernet. In my opinion, the best solution is to buy a standard Ethernet card for the V570 PLC and connect it to SCADA via Modbus TCP. P.S. Your connection method is also possible, but I can't give you more information because I don't have the Adam module available.

Yes, Visilogic have all needed FB for convertion. One thing that you must do - find the way to test - is it reading from sensor correct.

As far as I know - a rotary knife can not be implemented using the capabilities of the Unistream+Servo platform. This application requires high-speed positioning circuit processing with two encoders - material speed and knife motor speed. Such applications require specialized processing modules and appropriate technological software. I am familiar with solutions from Siemens, Nidec (Control Techniques) and Koolmorgen. The only case where this application could be built yourself with free software sample code - is a hardware kit from Control Techniques (Unidrive SP + SMEZmotion with Power tools Pro software) but Unidrive SP is out of production. All other solutions require additional costs for both hardware and software. You can contact support@unitronics.com for information.

Manual say 380-440VAC +10% - 15%. 440VAC+10%=484VAC.... It is possible maximum. Main problem - internal or external brake resistor can be burned if value above 480 is happened. Then you must ask support for information. Maybe Unitronics can provide customised servo with extended voltage range.

I try to check your code... I recommend to start new project with basic J1939 function. I think you find this sample code and understand idea how to convert MI vector to separate MI and MB.

One quastion: is it only SD Delimited Line write metod needed? (.csv file on SD) Maybe Write Data table to SD file is better solution?

No, PLC can connect to this sensor. But you must use J1939 CAN protocol implemented in Visilogic FB. It is different standard (Not CANopen) but it supported by Vision PLC.

Hi, you must read Visilogic help about J1939 CAN bus communication. SAE J1939 is a CANbus protocol that is supported by Enhanced Division Vision OPLC™ models. Within the J1939 network, the Vision functions as an ECU (Electronic Control Unit). Than you must know J1939 is not CANopen protocol. All configuration must be done via Visilogic J1939 FB in Com menu.