kratmel
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Posts posted by kratmel
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eBay find. I wonder what software this mysterious PLC was programmed with.
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Please post indicator model and used PLC model.
If it possible post link or pdf for indicator manual.
Your problem can be hardware, software or protocol fb related.
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12 hours ago, Jhav said:
I was wondering if there is a simple way of using one timer for multiple inputs.
This is another way - try to configure standard Alarms with configured delay. You do not specify PLC model but 16 to 128 Alarms can be configured with different delay.
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Maybe this help topic is useful
https://support.unitronics.com/index.php?/selfhelp/view-article/how-to-connect-usl-to-usc-via-vnc
If your panel do not start - please send message to support@unitronics.com
Support remote connection help to solve your issue.
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Please read this topic
If you have a quastion - contact to support@unitronics.com
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In general, yes. However, you should experiment with the signals and make sure that the real algorithm corresponds to the desired one for the application you are building.
However, you should understand that the high-speed counter is reset to 0 by this Reload function or input signal instantly. However, the bits you see work within one program scan. And simply zeroing the variable takes time, which can cause an obstacle in the correct pulse count
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So, after conducting an experiment with manual control of the VFD, you came to the conclusion that it is in working condition.
Now it remains to find out how the two VFD differ converters.
Unfortunately, in the documentation for your Unitronics inverters,
https://www.unitronicsplc.com/wp-content/uploads/2020/06/Operation-Manual_UMI-EU-B1-v1.6.pdf
there is absolutely no mention about turning off and on the terminator for the 485 network in VFD.
The mention of J5 is only in figure 3-9 and it is not correct .
Please help add and correct the information about the 485 network terminators in the UMI VFD manuals.
https://www.unitronicsplc.com/wp-content/uploads/2020/06/Operation-Manual_UMI-EU-B1-v1.6.pdf
https://www.unitronicsplc.com/wp-content/uploads/2018/07/UMI-B5-UL-V1.0.pdf
https://www.unitronicsplc.com/wp-content/uploads/2018/07/UMI-B1-UL-V1.0.pdf
The lack of this information is probably the cause of the problem described in this topic.
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Unfortunately, I cannot assess your problem remotely.
However, there are standard engineering approaches to problem solving.
Therefore, I ask you to work out the following steps and give me the result of these steps.
1. Reset the frequency converter to factory settings. P00.18=1
2. Start the engine using the start and stop buttons.
3. Change the frequency from minimum to maximum via panel keybord.
4. Observe the behavior of the motor. If you have the problem of 7-8 Hz again in manual control -
YOU DID NOT ADJUST THE MOTOR PARAMETERS AND YOU DID NOT CARRY OUT THE MOTOR AUTOTUNING or VFD is defective.
Please send quastion to support@unitronics.com about motor autotuning process.
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An inverter is not a PLC! It is not possible to simply replace the inverter and the motor to get the same result.
You should understand that the vector motor operation mode is set in the inverter by default (P00,00=1 ) . This mode involves building a virtual model of the motor to create a control vector at the three-phase output. The model includes engine parameters from the nameplate and additional parameters that the inverter can measure in tuning mode. If you switch the operation mode in the small inverter to 2 (this is the simplest mode without current vector generation), then there will be no need to generate the motor model.
And if the inverter and the motor are in workingcondition, then everything should start working (on the same PLC setting).
Next, you follow the path described by me above - adjust the motor parameters and perform auto-tuning.
P.S. When sitting in a car of different sizes, you must adjust the height of the seat and the distance to the steering wheel. Now you are in a situation where you changed the car to a smaller one and for some reason you cannot see the road... You are definitely sure that you know how to drive a car. Just adjust the seat - the car is in good condition
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You have not described the task you want to solve.
In the title of the topic, you ask about
SPEED REFERENCE BY PRESSURE SENSOR.
In the text of the post, you ask
5 hours ago, Magnien said:I would like to indicate a setpoint pressure.
I assume that the system will have a VFD for the pump. And you want to regulate the pressure. Most of VFD have a built-in PID pressure regulator.
You can easily adjust such PID loop and give it the setpoint pressure from the PLC and read real pressure from sensor.
I agree with Flex that you can make a PID loop on a PLC, but I know from practice that, for example, to regulate water pressure, you need to additionally provide many auxiliary modes for the system, and accordingly, all this needs must to be adjusted somehow.
All this is already implemented in the VFD for pumps. It is only necessary to carefully read the manual for the desired standard application and set the parameters for it.
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Yes you find correct parameter P00.00
For test please set
2: SVPWM control
2 is suitable in applications which do not need
high control accuracy, such as the load of fan
and pump. One inverter can drive multiple
motors.After you can see this note
Note: Motor parameter autotuning is required
when vector mode is applied.Then if 0 o 1 set is selected in P00.00 - you MUST enter motor nameplate parameter in to P02 parameter group and set autotune bit P00.015.
Please read about Autotune metods 1 - rotating (for motor stand alone) and 2 - static (if motor cannot de-couple from the load).
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What sensor model you try to use?
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Try to use another brand memory stick.
If panel do not start try
If no success please send message to support@unitronics.com. Remote solution for update error provided by Unitronics staff.
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Please post order code for old and new temp scanner.
For find modbus address please use Visilogic Modbus sample project from Visilogic Help.
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Please note small VFD maybe use vector conrtol mode.
Bigger maybe use simple U/F constant mode.
To solve problem:
- check mode used in small VFD;
- change mode for U/F constant and try to start via communication;
-do not change mode but prepare correct motor settings and run autotune via panel or terminal - then check control via communication.
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Maybe this topic help to solve your task
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Please find sample code in U90 ladder program menu Help>>>>Sample U90 projects
......\Unitronics\Unitronics U90 Ladder\Examples\Modbus\JZ20-R10_Modbus_Ethernet_Slave_Server.U90
Client sample present also.
I think that parameters is not set correctly in your project.
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I think that the user did not select correct option in the HW configuration.
Unfortunately, user did not specify which settings he selected.
By selecting the quadrature (A/B) encoder option, we automatically select (maybe) that this is a reversible counting device, which also takes into account the direction of rotation of the encoder during the processing of two quadrature signals A and B.
Unfortunately, I do not have such IO on my desk to experimentally confirm or refute my guesses.
Although I may be wrong in my guesses - only the project sent by the user can show what is wrong with the encoder configuration or signal processing from it.
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Please send this quastion to
support@unitronics.com
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For furnaces, I created interfaces with various PLCs. Considering the small size of the built-in keyboards in small PLCs V350 and V700, I use separate large buttons + and - connected to the discrete inputs of the PLC to set the temperature, time, and step number.
As practice has shown, operators (who do not like to constantly change numbers on a small touch keyboard) like this solution.
The "Step in range" function for the ladder perfectly operates with the right numbers without allowing you to exceed the specified limits.
For example - 4 buttons only for temperature and time selection on Samba display.
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Please find sample code in U90 ladder program menu Help>>>>Sample U90 projects
......\Unitronics\Unitronics U90 Ladder\Examples\Motion control\Motor speed.U90
You must also read about hardware (HW) configuration and HSI - high speed input configuration for incremental encoder.
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From my experience, the use of the Samba controller is appropriate for economical one- and two-zone control. There are only two possible PID loops.
Increasing the number of sensors requires more inputs to control and more outputs to send a PWM signal. Accordingly, in the Vision series, 24 PID loops are available and all the capabilities you need for recording and programming heating profiles.
For the first attempts, you should definitely take a Vision series controller.
Ask your distributor about expansion options and you can easily expand the number of control channels.
Again, from experience, working with recipes and profiles is easier with a larger screen. Your task is to find a balance between the money spent and the result obtained.
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Mayby you not select Encoder Quadrature (A/B)
shift register
in Jazz, M91 PLCs and U90Ladder
Posted
Please use this solution
You can use vector of MB and Vector copy with overlapping and no need to use shift register.