static void Main(string[] args)
{
var client = new OpcClient("opc.tcp://127.0.0.1:49320");
client.Security.UserIdentity = new OpcClientIdentity("Tim", "1qaz2wsx3edc4rfv");
client.Security.EndpointPolicy = new OpcSecurityPolicy(OpcSecurityMode.SignAndEncrypt, OpcSecurityAlgorithm.Basic256);
client.Connect();
// 一次寫取多個Tag
OpcWriteNode[] wCommands = new OpcWriteNode[] {
new OpcWriteNode("ns=2;s=Channel2.Device1.Tag1", false), // 寫 boolean
new OpcWriteNode("ns=2;s=Channel2.Device1.Tag2", "Test"), // 寫 sting
new OpcWriteNode("ns=2;s=Channel2.Device1.Tag3", 8.7), // 寫 float
new OpcWriteNode("ns=2;s=Channel2.Device1.Tag3", (ushort)88) // 寫 word
};
OpcStatusCollection results = client.WriteNodes(wCommands);
// 一次讀取多個Tag
OpcReadNode[] rCommands = new OpcReadNode[] {
new OpcReadNode("ns=2;s=Channel2.Device1.Tag1"),
new OpcReadNode("ns=2;s=Channel2.Device1.Tag2"),
new OpcReadNode("ns=2;s=Channel2.Device1.Tag3"),
new OpcReadNode("ns=2;s=Channel2.Device1.Tag4")
};
IEnumerable <OpcValue> job = client.ReadNodes(rCommands);
int i = 0;
foreach (OpcValue value in job)
{
Console.WriteLine("ReadNode: {0},\t = {1}", rCommands[i].NodeId, value);
i++;
}
// 訂閱Tag5
OpcSubscription subscription = client.SubscribeDataChange("ns=2;s=Channel2.Device1.Tag5", HandleDataChanged);
subscription.PublishingInterval = 1000;
subscription.ApplyChanges();
Console.ReadLine();
client.Disconnect();
}
public OpcSubscription Subscribe(Common.DataSubscription subscriptionDef)
{
string[] nodes = subscriptionDef.monitored_items.Split("$");
string[] nodeparts;
int ns;
string path;
List <OpcSubscribeNode> nodesList = new List <OpcSubscribeNode>();
OpcDataChangeFilter filter;
if (subscriptionDef.report_on_timestamp_change)
{
filter = new OpcDataChangeFilter(OpcDataChangeTrigger.StatusValueTimestamp);
}
else
{
filter = new OpcDataChangeFilter(OpcDataChangeTrigger.StatusValue);
}
switch (subscriptionDef.deadband_type.ToLower())
{
case "percent": filter.DeadbandType = OpcDeadbandType.Percent; break;
case "absolute": filter.DeadbandType = OpcDeadbandType.Absolute; break;
default: filter.DeadbandType = OpcDeadbandType.None; break;
}
filter.DeadbandValue = subscriptionDef.deadband;
// create an empty subscription
OpcSubscription sub = _client.SubscribeNodes();
// create a monitoredItem for each tag to be monitored and add it to the subscription
OpcMonitoredItem thisItem;
foreach (string node in nodes)
{
nodeparts = node.Split(":");
ns = int.Parse(nodeparts[0]);
path = nodeparts[1];
thisItem = new OpcMonitoredItem(new OpcNodeId(path, ns), OpcAttribute.Value);
thisItem.DataChangeReceived += DataChangeReceived;
thisItem.Tag = Guid.Parse(nodeparts[2]);
thisItem.Filter = filter;
sub.AddMonitoredItem(thisItem);
}
//set the interval (milliseconds, 0 = whenever the value changes)
sub.PublishingInterval = subscriptionDef.interval;
sub.PublishingIsEnabled = true;
// make the server aware of the changes to the subscription
sub.ApplyChanges();
// set the Tag property of the subscription to the DataSubscription object that came from the database for later reference
sub.Tag = subscriptionDef;
// set the subscription-enabled status
if (subscriptionDef.enabled)
{
sub.ChangeMonitoringMode(OpcMonitoringMode.Reporting);
}
else
{
sub.ChangeMonitoringMode(OpcMonitoringMode.Disabled);
}
sub.StartPublishing();
return(sub);
}
