diff --git a/src/main/java/com/isu/gaswellwatch/vo/command/scss/CasingMode.java b/src/main/java/com/isu/gaswellwatch/vo/command/scss/CasingMode.java
index 99bad71..f24b0b8 100644
--- a/src/main/java/com/isu/gaswellwatch/vo/command/scss/CasingMode.java
+++ b/src/main/java/com/isu/gaswellwatch/vo/command/scss/CasingMode.java
@@ -82,7 +82,7 @@ public class CasingMode extends Command implements Timing {
         command.setLength(0);
         // 地址码  功能码  起始地址  连续长度  连续字长
         // 01     10     00AA    0004     08
-        command.append("011000AA000204");
+        command.append("011000AA000408");
         command.append(StringUtils.leftPad(Long.toHexString(this.toSeconds(this.minWellCloseTimeDuration)), 8, "0"));
         command.append(StringUtils.leftPad(Long.toHexString(this.toSeconds(this.maxWellCloseTimeDuration)), 8, "0"));
         resultList.add(ModbusCommandDto.builder().command(command.toString()).length(16).build());