关于ADS读取指定长度的位，结果问题

[Karlvision]

ADS位读取
例如 M100.0 ,长度10 ，布尔类型
获取结果 [M100.0] [False,False]
报文：
[调试] 2023-01-16 22:38:15.836 Thread [003] BeckhoffAdsServer[10086] : [127.0.0.1:10766] Tcp 接收：00 00 2C 00 00 00 C0 A8 A3 08 01 01 53 03 C0 A8 A3 09 01 01 BD 80 02 00 04 00 0C 00 00 00 00 00 00 00 12 00 00 00 21 40 00 00 20 03 00 00 0A 00 00 00
[调试] 2023-01-16 22:38:15.836 Thread [003] BeckhoffAdsServer[10086] : [127.0.0.1:10766] Tcp 发送：00 00 2A 00 00 00 C0 A8 A3 09 01 01 BD 80 C0 A8 A3 00 01 01 53 03 02 00 05 00 0A 00 00 00 00 00 00 00 12 00 00 00 00 00 00 00 02 00 00 00 00 00

而且第18个字节为0，不明白为什么？