Hello, I would like to know if the Modbus Java API provided by Jamod supports all the function code and especially the function code 01 Thank you for support Grégory
Duplicate of: https://sourceforge.net/p/jamod/bugs/53/
This should be handled by "Debug" static field....: public interface Modbus { /** * JVM flag for debug mode. Can be set passing the system property * net.wimpi.modbus.debug=false|true (-D flag to the jvm). */ public static final boolean debug = "true".equals(System.getProperty("net.wimpi.modbus.debug")); ... }
Hi, I need to create multiple slaves which are going to communicate with a modbus master app. Now I have defined multiple process images for each slave but when I couple the image with Modbus Coupler it is considering only one slave (Latest one). Do we have any provision where I can couple multiple process images?
Good morning, get the modbus master tcp to work. This gives me the values in hexadecimal, I did some tests and it works perfectly. The last two pairs of 00 show me the data reading, at first I think it is the information of the slave, the type of data to read, in this case holding register. What I can not do is get the data I read in a floating number import java.io.*; import java.lang.*; import java.net.InetAddress; import net.wimpi.modbus.Modbus; import net.wimpi.modbus.io.ModbusTCPTransaction;...
I solved, the problem was that the modbus data simulator (http://www.plcsimulator.org/) was set with number of server connection 10, changing this parameter with 1000 the app works fine.
I don't have an example, but it should work to open the connection first and close it at the end when finished. In the loop do read and display the output. If your goal is to have 1 sec output you should set a timer event for 1sec to update the output. Here is an example of a timer thread but you can do your own google search to find other examples: https://stackoverflow.com/questions/9413656/how-to-use-timer-class-to-call-a-method-do-something-reset-timer-repeat?newreg=0d9fcf1d977f487f8c72bc2ee...
Hi John, do you have an exampe with refresh update of 1 second?
You can try to reduce your sleep time so that the read operation is able to work more frequently. As long as you have some sleep time in the loop it will prevent it from spinning and using up all of the processor time. Also you probably want to open the TCP socket in a separate method and leave it open for the duration rather than reconnecting every second. That is probably where all the extra time is going. John
Thread threadInit = new Thread(new Runnable() { public void run() { Message msg = null; enExecution = true; Integer i = 0; while (enExecution) { try { i++; readDataMb(); Thread.sleep(1000); //mmsec Refresh data } catch (InterruptedException e) { Log.d("[Android]Main", e.getMessage()); } } } }); threadInit.start(); private void readDataMb() { String astr = "192.168.3.88"; //Modbus Device InetAddress addr = null; try { addr = InetAddress.getByName(astr); } catch (UnknownHostException e) { e.printStackTrace();...
Here is what I used. You call ModbusCOnvUtil.wrap(response) around the response. I only filled in a couple of conversions, and the byte ordering is for a Modicon M340. As has been pointed out here there isn't really a "standard" but this byte ordering works most places I have needed it. Hope it works fo ryou. import net.wimpi.modbus.msg.ModbusResponse; import java.io.ByteArrayOutputStream; import java.io.DataOutputStream; import java.io.IOException; import java.nio.ByteBuffer; /** * Helper for converting...
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Thank you for your help.
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