public static ReadDataServiceReply ReadLogixData(SessionInfo si, string tagAddress, ushort elementCount)
{
int requestSize = 0;
ReadDataServiceRequest request = BuildLogixReadDataRequest(tagAddress, elementCount, out requestSize);
EncapsRRData rrData = new EncapsRRData();
rrData.CPF = new CommonPacket();
rrData.CPF.AddressItem = CommonPacketItem.GetConnectedAddressItem(si.ConnectionParameters.O2T_CID);
rrData.CPF.DataItem = CommonPacketItem.GetConnectedDataItem(request.Pack(), SequenceNumberGenerator.SequenceNumber);
rrData.Timeout = 2000;
EncapsReply reply = si.SendUnitData(rrData.CPF.AddressItem, rrData.CPF.DataItem);
if (reply == null)
{
return(null);
}
if (reply.Status != 0 && reply.Status != 0x06)
{
//si.LastSessionError = (int)reply.Status;
return(null);
}
return(new ReadDataServiceReply(reply));
}
internal void GenerateRequests()
{
int rSize = 0;
_readRequest = LogixServices.BuildLogixReadDataRequest(_address, _elements, out rSize);
_writeRequest = LogixServices.BuildLogixWriteDataRequest(_address, _dataType, _elements, new byte[] { });
}
public static ReadDataServiceRequest BuildLogixReadDataRequest(string tagAddress, ushort number, out int requestSize)
{
byte[] newIOI = IOI.BuildIOI(tagAddress);
int pathLen = newIOI.Length;// IOI.BuildIOI(null, tagAddress);
ReadDataServiceRequest request = new ReadDataServiceRequest();
request.Service = (byte)ControlNetService.CIP_ReadData;
request.PathSize = (byte)(pathLen / 2);
byte[] path = new byte[pathLen];
Buffer.BlockCopy(newIOI, 0, path, 0, newIOI.Length);
//IOI.BuildIOI(path, tagAddress);
request.Path = path;
request.Elements = number;
requestSize = request.Size;
return request;
}
public static ReadDataServiceRequest BuildFragmentedReadDataRequest(string tagAddress, ushort number, uint offset, out int requestSize)
{
byte[] newIOI = IOI.BuildIOI(tagAddress);
int pathLen = newIOI.Length;// IOI.BuildIOI(null, tagAddress);
ReadDataServiceRequest request = new ReadDataServiceRequest();
request.Service = (byte)ControlNetService.CIP_ReadDataFragmented;
request.PathSize = (byte)(pathLen / 2);
request.IsFragmented = true;
request.DataOffset = offset;
byte[] path = new byte[pathLen];
Buffer.BlockCopy(newIOI, 0, path, 0, newIOI.Length);
//IOI.BuildIOI(path, tagAddress);
request.Path = path;
request.Elements = number;
requestSize = request.Size;
return(request);
}
public static ReadDataServiceRequest BuildShortReadDataRequest(uint tagInstance, ushort number, ushort size, out int requestSize)
{
byte[] newIOI = IOI.BuildIOI(tagInstance);
int pathLen = newIOI.Length;
ReadDataServiceRequest request = new ReadDataServiceRequest();
request.Service = 0x4E;// (byte)ControlNetService.CIP_ReadData;
request.PathSize = 0x03;
byte[] path = new byte[] { 0x20, 0xB2, 0x25, 0x00, 0x21, 0x00 };
request.Path = path;
request.Elements = number;
byte[] addData = new byte[10 + newIOI.Length];
addData[0] = 0x02; addData[1] = 0x00; addData[2] = 0x01; addData[3] = 0x01; addData[4] = 0x01;
addData[5] = (byte)(size & 0xFF); addData[6] = (byte)((size & 0xFF00) >> 8);
addData[7] = 0x03; addData[8] = 0x20; addData[9] = 0x6B;
Buffer.BlockCopy(newIOI, 0, addData, 10, newIOI.Length);
request.AddtlData = addData;
requestSize = request.Size;
return request;
}
private void AddOrCreateReadPacket(LogixTag tag, int idx)
{
//First we create the request...
int temp = 0;
ReadDataServiceRequest request = LogixServices.BuildLogixReadDataRequest(
tag.Address, tag.Elements, out temp);
//Now we read it from the PLC to find out if it's fragmented...
CommonPacketItem addressItem = CommonPacketItem.GetConnectedAddressItem(_parent.SessionInfo.ConnectionParameters.O2T_CID);
CommonPacketItem dataItem = CommonPacketItem.GetConnectedDataItem(request.Pack(), SequenceNumberGenerator.SequenceNumber);
EncapsReply reply = _parent.SessionInfo.SendUnitData(addressItem, dataItem);
if (reply != null)
{
//It's a good tag, let's figure out if it's fragmented...
ReadDataServiceReply rdReply = new ReadDataServiceReply(reply);
PacketMap pm = new PacketMap()
{
TagIndex = idx
};
pm.PacketIndex = new List <int>();
pm.ServiceIndex = new List <int>();
pm.Offsets = new List <uint>();
pm.NumReplies = 1;
if (rdReply.Status == 0x06)
{
//Partial read... We'll have to request more data, but first let's make this packet
request = LogixServices.BuildFragmentedReadDataRequest(tag.Address, tag.Elements,
0, out temp);
int[] status = FindPacketOrCreate(request.Pack(), (ushort)(rdReply.Data.Length + 2));
uint offset = (uint)rdReply.Data.Length;
pm.PacketIndex.Add(status[0]);
pm.ServiceIndex.Add(status[1]);
pm.Offsets.Add(0);
while (rdReply.Status == 0x06)
{
rdReply = LogixServices.ReadLogixDataFragmented(_parent.SessionInfo, tag.Address, tag.Elements,
offset);
request = LogixServices.BuildFragmentedReadDataRequest(tag.Address, tag.Elements,
offset, out temp);
status = FindPacketOrCreate(request.Pack(), (ushort)(rdReply.Data.Length + 2));
pm.PacketIndex.Add(status[0]);
pm.ServiceIndex.Add(status[1]);
offset += (uint)rdReply.Data.Length;
pm.Offsets.Add(offset);
pm.NumReplies++;
}
}
else if (rdReply.Status == 0x00 && rdReply.Data != null)
{
//Full read, create the packet...
int[] status = FindPacketOrCreate(request.Pack(), (ushort)(rdReply.Data.Length + 2));
pm.PacketIndex.Add(status[0]);
pm.ServiceIndex.Add(status[1]);
pm.Offsets.Add(0);
}
_readPackets.Add(pm);
}
}
