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西门子支持两种字符串读取和下发

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This commit is contained in:
iioter 2022-08-22 12:45:49 +08:00
parent a1128ce109
commit feb09b14ae
2 changed files with 71 additions and 22 deletions
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IoTGateway/iotgateway.db
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93
Plugins/Drivers/DriverSiemensS7/SiemensS7.cs
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@ -2,6 +2,8 @@
using S7.Net;
using System.Text;
using Microsoft.Extensions.Logging;
using System;
using S7.Net.Types;
namespace DriverSiemensS7
{
@ -102,7 +104,15 @@ namespace DriverSiemensS7
{
try
{
ret.Value = plc.Read(ioarg.Address);
if (ioarg.ValueType == DataTypeEnum.AsciiString)
{
var dataItem = S7.Net.Types.DataItem.FromAddress(ioarg.Address);
var head = plc.ReadBytes(dataItem.DataType, dataItem.DB, dataItem.StartByteAdr, 2);
var strBytes = plc.ReadBytes(dataItem.DataType, dataItem.DB, dataItem.StartByteAdr + 2, head[1]);
ret.Value = Encoding.ASCII.GetString(strBytes).TrimEnd(new char[] { '\0' }); ;
}
else
ret.Value = plc.Read(ioarg.Address);
if (ioarg.ValueType == DataTypeEnum.Float)
{
var buffer = new byte[4];
@ -129,22 +139,25 @@ namespace DriverSiemensS7
return ret;
}
[Method("读字符串", description: "读字符串")]
public DriverReturnValueModel ReadString(DriverAddressIoArgModel ioarg)
[Method("读西门子字节字符串", description: "DB10.DBW6,10 即开始地址，字节长度")]
public DriverReturnValueModel ReadByteString(DriverAddressIoArgModel ioarg)
{
var ret = new DriverReturnValueModel { StatusType = VaribaleStatusTypeEnum.Good };
if (plc != null && plc.IsConnected)
{
var str = string.Empty;
try
{
int db = int.Parse(ioarg.Address.Trim().Split(',')[0]);
int startAdr = int.Parse(ioarg.Address.Trim().Split(',')[1]);
int count = int.Parse(ioarg.Address.Trim().Split(',')[2]);
var buffers = plc.ReadBytes(DataType.DataBlock, db, startAdr, count);
var str = Encoding.ASCII.GetString(buffers);
if (str.Contains('\0'))
str = str.Split('\0')[0];
var arrParams = ioarg.Address.Trim().Split(',');
if (arrParams.Length ==2)
{
var dataItemitem = S7.Net.Types.DataItem.FromAddress(arrParams[0]);
int.TryParse(arrParams[1], out var length);
var data = plc.ReadBytes(dataItemitem.DataType, dataItemitem.DB, dataItemitem.StartByteAdr, length);
str = Encoding.ASCII.GetString(data).TrimEnd(new char[] { '\0' });
}
ret.Value = str;
}
catch (Exception ex)
@ -260,7 +273,7 @@ namespace DriverSiemensS7
toWrite = float.Parse(ioarg.Value.ToString());
break;
case DataTypeEnum.AsciiString:
toWrite = Encoding.ASCII.GetBytes(ioarg.Value.ToString());
toWrite = GetStringBytes(ioarg);
break;
default:
rpcResponse.Description = $"类型{DataTypeEnum.Float}不支持写入";
@ -268,7 +281,10 @@ namespace DriverSiemensS7
}
if (toWrite == null)
{
rpcResponse.Description = "解析错误";
return rpcResponse;
}
//通用方法
if (method == nameof(Read))
@ -279,18 +295,16 @@ namespace DriverSiemensS7
return rpcResponse;
}
//字符串
else if (method == nameof(ReadString))
else if (method == nameof(ReadByteString))
{
int db = int.Parse(ioarg.Address.Trim().Split(',')[0]);
int startAdr = int.Parse(ioarg.Address.Trim().Split(',')[1]);
int count = int.Parse(ioarg.Address.Trim().Split(',')[2]);
//防止写入到其他地址 进行截断
if (((byte[])toWrite).Length > count)
toWrite = ((byte[])toWrite).Take(count);
plc?.Write(DataType.DataBlock, db, startAdr, toWrite);
rpcResponse.IsSuccess = true;
return rpcResponse;
var arrParams = ioarg.Address.Trim().Split(',');
if (arrParams.Length == 2)
{
var dataItem = DataItem.FromAddress(arrParams[0]);
plc?.Write(dataItem.DataType, dataItem.DB, dataItem.StartByteAdr, toWrite);
rpcResponse.IsSuccess = true;
return rpcResponse;
}
}
else
rpcResponse.Description = $"不支持写入:{method}";
@ -303,5 +317,40 @@ namespace DriverSiemensS7
return rpcResponse;
}
private byte[]? GetStringBytes(DriverAddressIoArgModel ioarg)
{
var toWriteString = ioarg.Value.ToString();
try
{
var arrParams = ioarg.Address.Trim().Split(',');
int length = 0;//最大长度，因为字符串后面得补满'\0'
//直接读取byte[]的方式
if (arrParams.Length == 2)
{
//如DB100.DBW23,10
int.TryParse(arrParams[1], out length);
}
//使用西门子String读取
else
{
//如DB100.DBW23
var dataItem = DataItem.FromAddress(ioarg.Address);
var head = plc.ReadBytes(dataItem.DataType, dataItem.DB, dataItem.StartByteAdr, 2);
length = head[0];
}
if (toWriteString.Length > length)
toWriteString = toWriteString.Take(length).ToString();
if (toWriteString.Length < length)
toWriteString = toWriteString.PadRight(length, '\0');
}
catch (Exception e)
{
throw new Exception("字符串解析异常");
}
return Encoding.ASCII.GetBytes(toWriteString);
}
}
}