diff --git a/src/main/java/com/qgs/dc/s7/my/s7connector/enmuc/S7Client.java b/src/main/java/com/qgs/dc/s7/my/s7connector/enmuc/S7Client.java
index 0619712..74d81ad 100644
--- a/src/main/java/com/qgs/dc/s7/my/s7connector/enmuc/S7Client.java
+++ b/src/main/java/com/qgs/dc/s7/my/s7connector/enmuc/S7Client.java
@@ -298,6 +298,11 @@ public enum S7Client {
 
     }
 
+    private void resetConnetctions(){
+        this.connections = new ArrayList<S7Connector>();
+        connectionPool();
+    }
+
     private void connectionPool(){
         for(int i=0;i<coreSize;i++){
             S7Connector connect = connect(host, rack, slot);
diff --git a/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/PLCinterface.java b/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/PLCinterface.java
index 7470566..8d25ea0 100644
--- a/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/PLCinterface.java
+++ b/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/PLCinterface.java
@@ -15,6 +15,9 @@ limitations under the License.
 */
 package com.qgs.dc.s7.my.s7connector.impl.nodave;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -27,7 +30,7 @@ public final class PLCinterface {
 	OutputStream out;
 	int protocol; // The kind of transport used on this interface.
 	int wp, rp;
-
+	private static final Logger logger = LoggerFactory.getLogger(PLCinterface.class);
 	public PLCinterface(final OutputStream out, final InputStream in, final String name, final int localMPI,
 			final int protocol) {
 		this.init(out, in, name, localMPI, protocol);
@@ -64,7 +67,7 @@ public final class PLCinterface {
 			}
 			return res;
 		} catch (final IOException e) {
-			e.printStackTrace();
+			logger.info("Socket read字节流失败: "+e);
 			return 0;
 		}
 	}
@@ -74,7 +77,7 @@ public final class PLCinterface {
 			this.out.write(b, start, len);
 			return 1;
 		} catch (final IOException e) {
-			System.err.println("Interface.write: " + e);
+			logger.info("Socket write字节流失败: "+e);
 			return 0;
 		}
 	}
diff --git a/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/TCPConnection.java b/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/TCPConnection.java
index 5e912b0..e6b1b7d 100644
--- a/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/TCPConnection.java
+++ b/src/main/java/com/qgs/dc/s7/my/s7connector/impl/nodave/TCPConnection.java
@@ -123,7 +123,8 @@ public final class TCPConnection extends S7Connection {
 		if(writeRes!=0 && readRes!=0){
 			return 0;
 		}else {
-			logger.info("exchange 出现了问题：① writeRes:"+writeRes+"② readRes:"+readRes);
+
+			logger.info("exchange 出现了问题：① writeRes:"+(writeRes==0?"writeISOPacket成功":"writeISOPacket失败")+"② readRes:"+(readRes==0?"readISOPacket成功":"readISOPacket失败"));
 			return 1    ;
 		}
 	}
@@ -149,27 +150,6 @@ public final class TCPConnection extends S7Connection {
 		return res;
 	}
 
-//	public static void main(String[] args) {
-//		byte[] s = new byte[2];
-//		List<Byte> a = new ArrayList<>();
-//		a.add(Byte.valueOf("1"));
-//		a.add(Byte.valueOf("2"));
-//		read(a);
-//		System.out.println(a.get(0));
-//		System.out.println(a.get(1));
-//	}
-//	public static int read(byte[] ss){
-//		ss[0] = 1;
-//		ss[1] = 1;
-//		return 0;
-//	}
-//	public static int read(List<Byte> ss){
-//		ss.set(0,Byte.valueOf("3"));
-//		ss.set(1,Byte.valueOf("4"));
-//		return 0;
-//	}
-
-
 	/**
 	 * Send iso packet.
 	 *
diff --git a/src/main/java/com/qgs/dc/s7/my/s7connector/type/DataTransportSize.java b/src/main/java/com/qgs/dc/s7/my/s7connector/type/DataTransportSize.java
index 0decdb5..36a492d 100644
--- a/src/main/java/com/qgs/dc/s7/my/s7connector/type/DataTransportSize.java
+++ b/src/main/java/com/qgs/dc/s7/my/s7connector/type/DataTransportSize.java
@@ -70,7 +70,7 @@ public enum DataTransportSize {
 
     public static DataTransportSize enumForValue(short value) {
         if (!map.containsKey(value)) {
-            logger.error("No DataTransportSize for value {}", value);
+            logger.info("No DataTransportSize for value {}", value);
         }
         return map.get(value);
     }