diff --git a/src/main/java/com/xydl/cac/transform/I2DataTransformer.java b/src/main/java/com/xydl/cac/transform/I2DataTransformer.java
index ee11093..3dab3fe 100644
--- a/src/main/java/com/xydl/cac/transform/I2DataTransformer.java
+++ b/src/main/java/com/xydl/cac/transform/I2DataTransformer.java
@@ -96,8 +96,22 @@ public class I2DataTransformer {
             node.setEquipmentid(sensor.getEquipmentId());
         } else {
             attr.setValue("");
-            node.setSensorid(sensor.getSensorCode() + attach);
-            node.setEquipmentid(sensor.getEquipmentId() + attach);
+            String code = sensor.getSensorCode();
+            node.setSensorid(code);
+            if (code != null && code.length() > attach.length() + 2) {
+                int len = code.length() - 2;
+                String tail = code.substring(len);
+                String first = code.substring(0, len - attach.length());
+                node.setSensorid(first + attach + tail);
+            }
+            String equipmentid = sensor.getEquipmentId();
+            node.setEquipmentid(equipmentid);
+            if (equipmentid != null && equipmentid.length() > attach.length() + 2) {
+                int len = equipmentid.length() - 2;
+                String tail = equipmentid.substring(len);
+                String first = equipmentid.substring(0, len - attach.length());
+                node.setEquipmentid(first + attach + tail);
+            }
         }
         return node;
     }