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kratmel

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Everything posted by kratmel

  1. Please check process via Ctrl Alt Del - sometimes visilogic present in process or application but not present on screen. It is not possible to start another one while "hidden" copy is active. For run different versions you must use Version Swapper. It is not possible to run another version if present is registered. Best way - uninstall all version, clean registry and install all needed via Version swapper. I use Visi on XP SP2 and Win 7 on notebook, and XP SP3, Win 7, W10 on PC starterd from different hard drive. Only one problem found - when try to
  2. Hi, 1)Please check HW-config in Visilogic 2) From manual ---- Connecting RG Pins. For correct operation of digital and analog inputs and for EMIimmunity, connect the RG pin of all the expansion modules containing RG signals to the adapter module 0V signal. The overall length of the wire connecting the RG pins to the adapter 0V signal must be less than 3 meters. Connect the RG pins inseries (daisy chain). To facilitate this, use both the RG pins. 3) From manual----Do not connect the neutral or line signal of the 110/220VAC to the device’s 0V pin. 4) Use another power supply.
  3. As far as I understand the author of the topic - he was going to create a system that collects data on the operating time of the plungers. He does not need to control them - but only count the time of the on state. To do this, he was going to connect the output signals of the existing in the system controller to the inputs of the samba PLC. If so, then his actions are clear and correct. Accordingly, Ausman emphasizes that if the Samba PLC controls the process - then the connection of its own inputs to its own outputs is redundant and can be replaced by a simple program reading of the
  4. Thanks, This is foto of installation for elevator - NEMA 4 cabinet with two VFD inside working now on 3 production lines. The first of them was installed 2 years ago. The customer had problems with the wires. Shielded remote control wires and cables to two motors are damaged very quickly (galvanic chemical production). And this often led to the failure of VFDs that were mounted in a large control cabinet at the beginning of the line. We changed the scheme - put two VFD in the NEMA 4 cabinet and installed it directly on the elevator. Currently, only a flexible mobile uns
  5. It is little copy paste mistake in table 0007 is not 1.5kW drive (row#6). I use the rule 1 to 8, respectively, 1 volume of the frequency converter should correspond to 8 volumes of air in the box where the VFD is placed in a closed cabinet. It works on an elevator that moves over chemical baths. However, there the ratio of operating time to the total time of the VFD cycle there does not exceed 40%. P.S. I cannot upload picture of this installation (my profile attachment limit if full)
  6. Hi YINGD! You must use data from this table from unitronics support https://support.unitronics.com/index.php?/selfhelp/view-article/umi-unitronics-vfd-heat-dissipation and make some investigation with this document https://literature.rockwellautomation.com/idc/groups/literature/documents/td/sp200-td001_-en-e.pdf Then you can see - is it possible to use UMI-0015BU-B1 in NEMA 4 Enclosure with predefined box dimention.
  7. Similar question in topic and some tips...
  8. Hi Ausman, in this case i found many different solution on real machines. As for me no earth contact on power supply is MW idea for cost saving. Now i see both variant of MW PS - old MDR with EARTH and new without. Old wariant is approx 10-15% bigger price. But I think the grounding (or not present gronding) of the primary side doesn't matter if the power supply has a grounded minus of the secondary part. Maybe you can find useful this link. https://www.klocknermoeller.com/klockner.moeller/Wiring_Manual_English.pdf start from p.1-17. In this
  9. Hi Skof, Stepper motor by definition - an open loop control system. After switching it on, it must be set to a known position. (Homing process) You probably think it will be able to stay where it left off. However, this is only possible if the driver controls it by natural characteristics (magnetic step). That is, the 200-step/rotation motor must be electrically rotated only for 200 steps/rotation. If you use a driver with step divider(from 2 to 128 or more) - after shutting it down, it will forget electrically divided step where it was (and motor will rotate a little by hims
  10. Maybe my post will not help solve the problem with stepper motor, but I want to note (you wrote about the possibility of breaking the valve) - this system, even with the best settings, will break it someday ... Therefore, I recommend abandoning the stepper motor and consider other options: 1) use the 3 state control actuator with analog feedback (Belimo or other type), and apply the control algorithm idea described in the example V120_PID_motorized_valve_output_with_physical_feedback.vlp from Visilogic help. 2) use the 3 state drive without feedback but with
  11. kratmel

    Oddity

    I thought that there were not enough months on earth. In fact, if you look at a welding machine from a well-known manufacturer, you can guess why it stopped working. The time machine told her to make this leap, cancel the license and stop work. However, the license was indefinite and therefore on the second attempt it changed the number of months in the year .. I had to overcome this shift in time - the welding machine works. However, evidence of the time machine remained on photo. 😎
  12. Please share model or nameplate photo. Is it problem present from start with V350 or it appears on long time normal working installation?
  13. Use different power supply possible only when output is "isolated". Fof example V200-18-E3XB has 2 isolated pnp/npn (source/sink) transistor outputs and 4 isolated analog outputs. However, the user must remember that these separate power supplies must be turned on and off at the same time or in the correct sequence. As an option - start powering the panel and then power the output - and turn it off in reverse order. The PLC uses output drivers that are protected against short circuits, overheating and usually undervoltage. Turning off the driver power (in your case + V0) could t
  14. Hi, I will try to describe why it works without a connection. 1) There is output board inIside of the Unitronics OPLC controller. 2) Each of the solid state outputs is a part (one channel) of the few chip VN340SP (or something like that on foto). 3) To send signals from the processor to this chip, we must have one common wire and several separate ones for the required number of outputs. This common wire also neded for power the VN340SP. This wire is the OV contact you specified. 4) This OV contact is connected to the main power OV contact of the PLC panel through a small
  15. Maybe problem is solved, but some tips from this manual is useful for the user needs real OPLC based dual screen. https://i4automation.co.uk/i4appnotes/Dual screens.pdf
  16. Please find in Unitronics U90 ladder Help sample project: C:\Program Files\Unitronics\Unitronics U90 Ladder\Examples\PID\On off with hysteresis.U90 and open it. Please "Save as" this project with New name. In HW Configuration section of project change controller type to JZ20-UA24. Open this controller configuration. Please configure analog input Type (proper termocoupler type must be used) and select MI0 - destination for Analog input. Download project to PLC and use O0 to control the heater (you must use properly connected SSR or contactor for power control). Re
  17. On forum is present topic about self made ribbon cable used for connection of expansion modules in two rows. If in your application used only standard input and output (no HSI or HSO or analog I/O) maybe this type of connection is possible. But it is not recommended in application with VFD or another EMI sorces.
  18. Is it possible that present this issue from help? ----Be aware that: A Data Table and the Struct it is linked to cannot have identical names. If the names are identical, you will not be able to link the struct members to the parameters of Data Table ladder functions.---
  19. Perhaps this is due to the large length of the row - a large number of columns?
  20. As i see in help - WatchDog timer duration = 500 milliseconds. If in project present long DTI with row from 0 to N (i do not know what number N is long???) insert row to 1, 2, 3.... (small number) row make a lot of shift row operation... to N+1 If this operation is to long in time (program "stopped" in point "insert row" ) WatchDog is activated.
  21. Is it input configuration jamper in correct position? NPN input type needed.
  22. Everyone in the process of building a program in the Visilogic comes to their own style of writing. Therefore, we can come to the same action in our programs in completely different ways. In most cases, I have to test the program without having the whole system at hand. Therefore, for almost all types of panels, I wrote "my standard" routines for polling inputs and output control. This led to the idea that the activation of the output should be only in one place in the program - in this case, the subroutine OUTPUTS. Input polling is similar in another subroutine INPUTS. Values
  23. I support the version that this is a problem with updating Windows. However, I had problems with the USB to COM driver once due to interference from the computer's power supply. It was powered from a different power than the machine to which it was connected. Disconnecting the power supply from the mains and running on batteries solved the problem in this case. Now i use isolated USB to COM.
  24. Please use hardware PWM out O0 or O1 configuration for test. Please delete PWM scan block from ladder. Using software PWM method gives incorrect results for your case. Maybe ladder PWM generation is interrupted by immediate command. Hardware PWM do not use CPU resorces for generation. It is used for shaft encoder in author project...
  25. I don't know, maybe it will help ... I would advise the author to turn his PLC into a test bench for a while. 1-step Set a high-speed output (O0 or O1) with PWM function in the configuration and make it possible to change the parameters (Duty Cycle and Frequency) of this output on the screen. Also start-stop buton on screen and PWM run bit ladder logic needed. You can build automatic frequency increment with fixed step from 0 to the 1000Hz for example. 2-step Use wires to send a signal from this output to the input that the author wants to turn into a counter. Step 3 - Write
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