diff --git a/acs/nladmin-system/src/main/java/org/nl/acs/opc/DeviceOpcProtocolRunable.java b/acs/nladmin-system/src/main/java/org/nl/acs/opc/DeviceOpcProtocolRunable.java
index 4a39009..073ec66 100644
--- a/acs/nladmin-system/src/main/java/org/nl/acs/opc/DeviceOpcProtocolRunable.java
+++ b/acs/nladmin-system/src/main/java/org/nl/acs/opc/DeviceOpcProtocolRunable.java
@@ -187,6 +187,7 @@ public class DeviceOpcProtocolRunable implements Runnable {
                     Thread.sleep((long) (OpcConfig.synchronized_exception_wait_second * 1000));
                 } catch (InterruptedException e) {
                     e.printStackTrace();
+                    Thread.currentThread().interrupt();
                 }
                 ++this.error_num;
                 if (this.error_num > 3 && !StrUtil.equals(this.message, error_message)) {