diff --git a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RateModelRequestLogic.java b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RateModelRequestLogic.java
index 6dd5ad75..ee956d39 100644
--- a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RateModelRequestLogic.java
+++ b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RateModelRequestLogic.java
@@ -48,7 +48,7 @@ public class RateModelRequestLogic implements ServiceLogic {
         String resultStr = "685E".concat(seq).concat("000A").concat(pileNo)
                 .concat(String.format("%04X", rateModelId))
                 .concat(rateModel);
-        resultStr = resultStr.concat(CRCCalculator.calcCrc(resultStr));
+        resultStr = resultStr.concat(CRCCalculator.calcCrc(resultStr.substring(4)));
         return new ServiceResult(HexUtils.toBytes(resultStr), ServiceResult.OK);
     }