kratmel

You can read about my experimental result in quoted topic --- .... if we sw ON any of TC input in SI15 appear temperature readings from internal TC cold junction sensor. I try different combination - if any onboard TC sensor is activated - SI15 show temperature in 0.1C (I tried to serve hot and cold air - the reaction is adequate). If no TC is active - SI15=0.... Then now you can try to activate any TC input ( without sensor) and use SI15 for internal temperature readout. It is undocumented but i test it on real V130-33-RA22. I think that in Samba there is the same scheme of compensation for TC. If in future you need to use TC - no changes needed. It is simple solution. But you ask about

Samba 43 is a simplified version of V430. You do not post samba model. If model # end with TA RA or TRA - you can configure analog input as termocouple and short temperature input via wire (no sensor needed) - PLC in configured MI show temperature from embedded compensation temprature sensor. You can also read this useful topic

One of possible solution for many valves and one pump control

In this doc on p.106 you can find why your V350 stop UNICAN https://www.mikrocontroller.net/attachment/157952/VisiLogic_-_Communications.pdf Please send quastion to support@unitronics.com about possible solution and post answer to topic. I think Unit ID collision for RS485 communication appear.

Please post your Visilogic projects with normal and "corrupted" CAN configuraion with RS485

Joe I agree that copying the bit vector is not stated in the U90 ladder. However, the author can operate with numbers and use Vector Copy for MI variables present in U90 as SI140-SI143. That is, the object seen by the camera is recorded in MI with the number 1, and the missing object = 0. Next, by double copying MI vectors, we implement a shift with an overlap if it cannot be done as in visilogic. Although I haven't tried to do MI vector copy with overlapping in U90 ladder. Experiment needed for test

Please use this solution You can use vector of MB and Vector copy with overlapping and no need to use shift register.

eBay find. I wonder what software this mysterious PLC was programmed with.

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.

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.

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.

Please read this topic If you have a quastion - contact to support@unitronics.com

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

Visilogic Help Info

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 . @Cara Bereck Levy 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.

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.

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

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 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.

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).

What sensor model you try to use?

Try to use another brand memory stick. If panel do not start try https://support.unitronics.com/index.php?/selfhelp/view-article/rescue-procedure-to-recover-unistream-panels If no success please send message to support@unitronics.com. Remote solution for update error provided by Unitronics staff.

Please post order code for old and new temp scanner. For find modbus address please use Visilogic Modbus sample project from Visilogic Help.

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.

Maybe this topic help to solve your task

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.