/***
* Copyright 2002-2010 jamod development team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
***/
package net.wimpi.modbus.cmd;
import java.net.InetAddress;
import net.wimpi.modbus.io.ModbusUDPTransaction;
import net.wimpi.modbus.msg.WriteCoilRequest;
import net.wimpi.modbus.net.UDPMasterConnection;
import net.wimpi.modbus.Modbus;
/**
* Class that implements a simple commandline
* tool for writing to a digital output.
* <p>
* Note that if you write to a remote I/O with
* a Modbus protocol stack, it will most likely
* expect that the communication is <i>kept alive</i>
* after the first write message.<br>
* This can be achieved either by sending any kind of
* message, or by repeating the write message within a
* given period of time.<br>
* If the time period is exceeded, then the device might
* react by turning pos all signals of the I/O modules.
* After this timeout, the device might require a
* reset message.
*
* @author Dieter Wimberger
* @version @version@ (@date@)
*/
public class UDPDOTest {
public static void main(String[] args) {
UDPMasterConnection conn = null;
ModbusUDPTransaction trans = null;
WriteCoilRequest req = null;
InetAddress addr = null;
int ref = 0;
boolean set = false;
int repeat = 1;
int port = Modbus.DEFAULT_PORT;
try {
//1. Setup the parameters
if (args.length < 3) {
printUsage();
System.exit(1);
} else {
try {
String astr = args[0];
int idx = astr.indexOf(':');
if(idx > 0) {
port = Integer.parseInt(astr.substring(idx+1));
astr = astr.substring(0,idx);
}
addr = InetAddress.getByName(astr);
ref = Integer.parseInt(args[1]);
set = "true".equals(args[2]);
if (args.length == 4) {
repeat = Integer.parseInt(args[3]);
}
} catch (Exception ex) {
ex.printStackTrace();
printUsage();
System.exit(1);
}
}
//2. Open the connection
conn = new UDPMasterConnection(addr);
conn.setPort(502);
conn.connect();
//3. Prepare a request
req = new WriteCoilRequest(ref, set);
req.setUnitID(0);
if (Modbus.debug) System.out.println("Request: " + req.getHexMessage());
//4. Prepare the transaction
trans = new ModbusUDPTransaction(conn);
trans.setRequest(req);
//5. Execute the transaction repeat times
int k = 0;
do {
trans.execute();
if (Modbus.debug) System.out.println("Response: " +
trans.getResponse().getHexMessage()
);
k++;
} while (k < repeat);
//6. Close the connection
conn.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}//main
private static void printUsage() {
System.out.println(
"java net.wimpi.modbus.cmd.UDPDOTest <address{:<port>} [String]> <register [int16]> <state [boolean]> {<repeat [int]>}"
);
}//printUsage
}//class DOTest