/** Connects to a PLC:
*
* url = "S7:host"
* url = "MODBUS:host"
* url = "AB:host"
* url = "NI:device/options"
*
*/
public bool Connect(String url)
{
Console.WriteLine("Info:" + DateTime.GetMilliSecondsSinceEpoch() + ":Controller.connect():" + url);
connected = false;
if (url == null)
{
Console.WriteLine("Error:url == null");
return(false);
}
if (url.StartsWith("S7:"))
{
plc = ControllerType.S7;
String host = url.Substring(3);
lock (s7_connect_lock) {
try {
socket = new TcpSocket();
// socket.setSoTimeout(3000);
socket.Connect(host, 102);
//connect1
{
byte[] packet = S7Packet.makeConnectPacket1();
socket.Write(packet);
byte[] reply = new byte[1500];
int replySize = 0;
do
{
int read = socket.Read(reply, replySize, 1500 - replySize);
if (read == -1)
{
throw new Exception("bad read");
}
replySize += read;
} while (!S7Packet.isPacketComplete(Arrays <byte> .CopyOf(reply, replySize)));
}
//connect2
{
byte[] packet = S7Packet.makeConnectPacket2();
socket.Write(packet);
byte[] reply = new byte[1500];
int replySize = 0;
do
{
int read = socket.Read(reply, replySize, 1500 - replySize);
if (read == -1)
{
throw new Exception("bad read");
}
replySize += read;
} while (!S7Packet.isPacketComplete(Arrays <byte> .CopyOf(reply, replySize)));
}
} catch (Exception e) {
Console.WriteLine("Error:" + e.ToString());
return(false);
}
}
connected = true;
return(true);
}
if (url.StartsWith("MODBUS:"))
{
plc = ControllerType.MB;
String host = url.Substring(7);
try {
socket = new TcpSocket();
socket.Connect(host, 502);
// socket.setSoTimeout(3000);
} catch (Exception e) {
Console.WriteLine("Error:" + e.ToString());
return(false);
}
connected = true;
return(true);
}
if (url.StartsWith("AB:"))
{
ab_context = new ABContext();
plc = ControllerType.AB;
String host = url.Substring(3);
try {
socket = new TcpSocket();
socket.Connect(host, 44818);
// socket.setSoTimeout(3000);
//connect1
{
byte[] packet = ABPacket.makeConnectPacket(ab_context);
socket.Write(packet);
byte[] reply = new byte[1500];
int replySize = 0;
do
{
int read = socket.Read(reply, replySize, 1500 - replySize);
if (read == -1)
{
throw new Exception("bad read");
}
replySize += read;
} while (!ABPacket.isPacketComplete(Arrays <byte> .CopyOf(reply, replySize)));
ENIP ip = new ENIP();
ip.read(reply, 0);
ab_context.session = ip.session;
}
} catch (Exception e) {
Console.WriteLine("Error:" + e.ToString());
return(false);
}
connected = true;
return(true);
}
return(false);
}
/** Writes data to PLC.
*
* datatype is required for AB controllers.
*/
public bool Write(String addr, byte[] data, DataType type)
{
addr = addr.ToUpperCase();
lock (tlock) {
if (!connected)
{
return(false);
}
switch (plc)
{
case ControllerType.S7: {
S7Data s7 = S7Packet.decodeAddress(addr);
s7.data = data;
byte[] packet = S7Packet.makeWritePacket(s7);
try {
socket.Write(packet);
} catch (Exception e) {
lastException = e;
return(false);
}
return(true);
}
case ControllerType.MB: {
ModAddr ma = ModPacket.decodeAddress(addr);
ma.state = data[0] != 0;
byte[] packet = ModPacket.makeWritePacket(ma);
try {
socket.Write(packet);
} catch (Exception e) {
lastException = e;
return(false);
}
byte[] reply = new byte[1500];
int replySize = 0;
try {
do
{
int read = socket.Read(reply, replySize, 1500 - replySize);
if (read == -1)
{
throw new Exception("bad read");
}
replySize += read;
} while (!ModPacket.isPacketComplete(Arrays <byte> .CopyOf(reply, replySize)));
} catch (Exception e) {
lastException = e;
return(false);
}
return(true);
}
case ControllerType.AB: {
if (type == DataType.ANY)
{
return(false);
}
byte[] packet = ABPacket.makeWritePacket(addr, ABPacket.getType(type), data, ab_context);
try {
socket.Write(packet);
} catch (Exception e) {
lastException = e;
return(false);
}
byte[] reply = new byte[1500];
int replySize = 0;
try {
do
{
int read = socket.Read(reply, replySize, 1500 - replySize);
if (read == -1)
{
throw new Exception("bad read");
}
replySize += read;
} while (!ABPacket.isPacketComplete(Arrays <byte> .CopyOf(reply, replySize)));
} catch (Exception e) {
lastException = e;
return(false);
}
return(true);
}
case ControllerType.JF: {
JFTag tag = JFPacket.decodeAddress(addr);
tag.data = data;
byte[] packet = JFPacket.makeWritePacket(tag, data);
try {
socket.Write(packet);
} catch (Exception e) {
lastException = e;
return(false);
}
return(true);
}
}
}
return(false);
}