diff --git a/acs/nladmin-system/src/main/java/org/nl/acs/device_driver/basedriver/standard_conveyor_control_with_scanner/StandardCoveyorControlWithScannerDeviceDriver.java b/acs/nladmin-system/src/main/java/org/nl/acs/device_driver/basedriver/standard_conveyor_control_with_scanner/StandardCoveyorControlWithScannerDeviceDriver.java
index 390a7ce..5a69494 100644
--- a/acs/nladmin-system/src/main/java/org/nl/acs/device_driver/basedriver/standard_conveyor_control_with_scanner/StandardCoveyorControlWithScannerDeviceDriver.java
+++ b/acs/nladmin-system/src/main/java/org/nl/acs/device_driver/basedriver/standard_conveyor_control_with_scanner/StandardCoveyorControlWithScannerDeviceDriver.java
@@ -655,10 +655,12 @@ public class StandardCoveyorControlWithScannerDeviceDriver extends AbstractOpcDe
     @Override
     public void setDeviceStatus(JSONObject data) {
         String requireSucess = data.getString("requireSucess");
-        if (requireSucess.equals("1")){
-            this.requireSucess = true;
-        } else if (requireSucess.equals("0")){
-            this.requireSucess = false;
+        if (StrUtil.isNotEmpty(requireSucess)){
+            if (requireSucess.equals("1")){
+                this.requireSucess = true;
+            } else if (requireSucess.equals("0")){
+                this.requireSucess = false;
+            }
         }
     }
 }