fix: 修复modbus命令下发值为负数时,下发值不对

@@ -91,11 +91,14 @@
   };
 
   // 获取小数
-  const getFloatPart = (number): any => {
+  const getFloatPart = (number: string | number) => {
+    const isLessZero = Number(number) < 0;
     number = number.toString();
     const floatPartStartIndex = number.indexOf('.');
-    const value = ~floatPartStartIndex ? `0.${number.substring(floatPartStartIndex + 1)}` : '0';
-    return value;
+    const value = ~floatPartStartIndex
+      ? `${isLessZero ? '-' : ''}0.${number.substring(floatPartStartIndex + 1)}`
+      : '0';
+    return Number(value);
   };
 
   const { createMessage } = useMessage();