软件计算结果：

原理参考下面的文章：
https://www.cnblogs.com/esestt/archive/2007/08/09/848856.html
https://blog.csdn.net/weixin_44256803/article/details/105805628
https://blog.csdn.net/d_leo/article/details/73572373

手算过程如下：
MODBUS：16位CRC，初始值0xFFFF，多项式0x8005，输入取反，输出取反。
第一步：原始数据 = “00010001 00100010 00110011 01000100 01010101 01100110 01110111 0000 0000 0000 0000”;（就是十六进制11 22 33 44 55 66 77转成二进制，再在尾部增加16位0）。
第二步：按字节取反（输入取反） = “10001000 01000100 11001100 00100010 10101010 01100110 11101110 0000 0000 0000 0000”;
第三步：前16位与初始值0xFFFF做异或运算：
然后运算过程如下：长的是被除数，短的是除数（多项式0x8005）

011101111011101111001100001000101010101001100110111011100000000000000000（前16位与初始值做了异或运算）11000000000000101（多项式0x8005）
00010111101110101000110000100010101010100110011011101110000000000000000011000000000000101
00001111101110101101110000100010101010100110011011101110000000000000000011000000000000101
00000011101110101111010000100010101010100110011011101110000000000000000011000000000000101
00000000101110101111111000100010101010100110011011101110000000000000000011000000000000101
00000000011110101111110010100010101010100110011011101110000000000000000011000000000000101
00000000000110101111110111100010101010100110011011101110000000000000000011000000000000101
00000000000000101111110110110010101010100110011011101110000000000000000011000000000000101
00000000000000011111110110111000101010100110011011101110000000000000000011000000000000101
00000000000000000111110110111101101010100110011011101110000000000000000011000000000000101
00000000000000000001110110111100111010100110011011101110000000000000000011000000000000101
00000000000000000000010110111100101110100110011011101110000000000000000011000000000000101
00000000000000000000001110111100101011100110011011101110000000000000000011000000000000101
00000000000000000000000010111100101001000110011011101110000000000000000011000000000000101
00000000000000000000000001111100101001101110011011101110000000000000000011000000000000101
00000000000000000000000000011100101001111010011011101110000000000000000011000000000000101
00000000000000000000000000000100101001111111011011101110000000000000000011000000000000101
00000000000000000000000000000010101001111110001011101110000000000000000011000000000000101
00000000000000000000000000000001101001111110100011101110000000000000000011000000000000101
00000000000000000000000000000000001001111110110111101110000000000000000011000000000000101
00000000000000000000000000000000000101111110110101001110000000000000000011000000000000101
00000000000000000000000000000000000011111110110100011110000000000000000011000000000000101
00000000000000000000000000000000000000111110110100110110000000000000000011000000000000101
00000000000000000000000000000000000000001110110100111100000000000000000011000000000000101
00000000000000000000000000000000000000000010110100111110100000000000000011000000000000101
00000000000000000000000000000000000000000001110100111110001000000000000011000000000000101
00000000000000000000000000000000000000000000010100111110011100000000000011000000000000101
00000000000000000000000000000000000000000000001100111110011001000000000011000000000000101
00000000000000000000000000000000000000000000000000111110011011100000000011000000000000101
00000000000000000000000000000000000000000000000000001110011011101010000011000000000000101
00000000000000000000000000000000000000000000000000000010011011101000100011000000000000101
00000000000000000000000000000000000000000000000000000001011011101000001011000000000000101
000000000000000000000000000000000000000000000000000000001110111010000111

最后16位取反（输出取反），得0xE177。