用结构化文本实现的MODBUSCRC计算-全面实用的工控技术信息-PLC技术网-可编程控制器技术门户

用结构化文本实现的MODBUSCRC计算

日期：2010-10-12 9:29:14 点击：
来源：中国工控网
作者：

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［摘要］：本文用ST语言实现了MODBUS CRC校验的计算

［关键词］：MODBUS CRC, ST语言

这是用ST语言写的MODBUS CRC程序

(*initialize array*)

CRCHi[0]:=BYTE#16#00; CRCLo[0]:=BYTE#16#00;

CRCHi[1]:=BYTE#16#C1; CRCLo[1]:=BYTE#16#C0;

CRCHi[2]:=BYTE#16#81; CRCLo[2]:=BYTE#16#C1;

CRCHi[3]:=BYTE#16#40; CRCLo[3]:=BYTE#16#01;

CRCHi[4]:=BYTE#16#01; CRCLo[4]:=BYTE#16#C3;

CRCHi[5]:=BYTE#16#C0; CRCLo[5]:=BYTE#16#03;

CRCHi[6]:=BYTE#16#80; CRCLo[6]:=BYTE#16#02;

CRCHi[7]:=BYTE#16#41; CRCLo[7]:=BYTE#16#C2;

CRCHi[8]:=BYTE#16#01; CRCLo[8]:=BYTE#16#C6;

CRCHi[9]:=BYTE#16#C0; CRCLo[9]:=BYTE#16#06;

CRCHi[10]:=BYTE#16#80; CRCLo[10]:=BYTE#16#07;

CRCHi[11]:=BYTE#16#41; CRCLo[11]:=BYTE#16#C7;

CRCHi[12]:=BYTE#16#00; CRCLo[12]:=BYTE#16#05;

CRCHi[13]:=BYTE#16#C1; CRCLo[13]:=BYTE#16#C5;

CRCHi[14]:=BYTE#16#81; CRCLo[14]:=BYTE#16#C4;

CRCHi[15]:=BYTE#16#40; CRCLo[15]:=BYTE#16#04;

CRCHi[16]:=BYTE#16#01; CRCLo[16]:=BYTE#16#CC;

CRCHi[17]:=BYTE#16#C0; CRCLo[17]:=BYTE#16#0C;

CRCHi[18]:=BYTE#16#80; CRCLo[18]:=BYTE#16#0D;

CRCHi[19]:=BYTE#16#41; CRCLo[19]:=BYTE#16#CD;

CRCHi[20]:=BYTE#16#00; CRCLo[20]:=BYTE#16#0F;

CRCHi[21]:=BYTE#16#C1; CRCLo[21]:=BYTE#16#CF;

CRCHi[22]:=BYTE#16#81; CRCLo[22]:=BYTE#16#CE;

CRCHi[23]:=BYTE#16#40; CRCLo[23]:=BYTE#16#0E;

CRCHi[24]:=BYTE#16#00; CRCLo[24]:=BYTE#16#0A;

CRCHi[25]:=BYTE#16#C1; CRCLo[25]:=BYTE#16#CA;

CRCHi[26]:=BYTE#16#81; CRCLo[26]:=BYTE#16#CB;

CRCHi[27]:=BYTE#16#40; CRCLo[27]:=BYTE#16#0B;

CRCHi[28]:=BYTE#16#01; CRCLo[28]:=BYTE#16#C9;

CRCHi[29]:=BYTE#16#C0; CRCLo[29]:=BYTE#16#09;

CRCHi[30]:=BYTE#16#80; CRCLo[30]:=BYTE#16#08;

CRCHi[31]:=BYTE#16#41; CRCLo[31]:=BYTE#16#C8;

CRCHi[32]:=BYTE#16#01; CRCLo[32]:=BYTE#16#D8;

CRCHi[33]:=BYTE#16#C0; CRCLo[33]:=BYTE#16#18;

CRCHi[34]:=BYTE#16#80; CRCLo[34]:=BYTE#16#19;

CRCHi[35]:=BYTE#16#41; CRCLo[35]:=BYTE#16#D9;

CRCHi[36]:=BYTE#16#00; CRCLo[36]:=BYTE#16#1B;

CRCHi[37]:=BYTE#16#C1; CRCLo[37]:=BYTE#16#DB;

CRCHi[38]:=BYTE#16#81; CRCLo[38]:=BYTE#16#DA;

CRCHi[39]:=BYTE#16#40; CRCLo[39]:=BYTE#16#1A;

CRCHi[40]:=BYTE#16#00; CRCLo[40]:=BYTE#16#1E;

CRCHi[41]:=BYTE#16#C1; CRCLo[41]:=BYTE#16#DE;

CRCHi[42]:=BYTE#16#81; CRCLo[42]:=BYTE#16#DF;

CRCHi[43]:=BYTE#16#40; CRCLo[43]:=BYTE#16#1F;

CRCHi[44]:=BYTE#16#01; CRCLo[44]:=BYTE#16#DD;

CRCHi[45]:=BYTE#16#C0; CRCLo[45]:=BYTE#16#1D;

CRCHi[46]:=BYTE#16#80; CRCLo[46]:=BYTE#16#1C;

CRCHi[47]:=BYTE#16#41; CRCLo[47]:=BYTE#16#DC;

CRCHi[48]:=BYTE#16#00; CRCLo[48]:=BYTE#16#14;

CRCHi[49]:=BYTE#16#C1; CRCLo[49]:=BYTE#16#D4;

CRCHi[50]:=BYTE#16#81; CRCLo[50]:=BYTE#16#D5;

CRCHi[51]:=BYTE#16#40; CRCLo[51]:=BYTE#16#15;

CRCHi[52]:=BYTE#16#01; CRCLo[52]:=BYTE#16#D7;

CRCHi[53]:=BYTE#16#C0; CRCLo[53]:=BYTE#16#17;

CRCHi[54]:=BYTE#16#80; CRCLo[54]:=BYTE#16#16;

CRCHi[55]:=BYTE#16#41; CRCLo[55]:=BYTE#16#D6;

CRCHi[56]:=BYTE#16#01; CRCLo[56]:=BYTE#16#D2;

CRCHi[57]:=BYTE#16#C0; CRCLo[57]:=BYTE#16#12;

CRCHi[58]:=BYTE#16#80; CRCLo[58]:=BYTE#16#13;

CRCHi[59]:=BYTE#16#41; CRCLo[59]:=BYTE#16#D3;

CRCHi[60]:=BYTE#16#00; CRCLo[60]:=BYTE#16#11;

CRCHi[61]:=BYTE#16#C1; CRCLo[61]:=BYTE#16#D1;

CRCHi[62]:=BYTE#16#81; CRCLo[62]:=BYTE#16#D0;

CRCHi[63]:=BYTE#16#40; CRCLo[63]:=BYTE#16#10;

CRCHi[64]:=BYTE#16#01; CRCLo[64]:=BYTE#16#F0;

CRCHi[65]:=BYTE#16#C0; CRCLo[65]:=BYTE#16#30;

CRCHi[66]:=BYTE#16#80; CRCLo[66]:=BYTE#16#31;

CRCHi[67]:=BYTE#16#41; CRCLo[67]:=BYTE#16#F1;

CRCHi[68]:=BYTE#16#00; CRCLo[68]:=BYTE#16#33;

CRCHi[69]:=BYTE#16#C1; CRCLo[69]:=BYTE#16#F3;

CRCHi[70]:=BYTE#16#81; CRCLo[70]:=BYTE#16#F2;

CRCHi[71]:=BYTE#16#40; CRCLo[71]:=BYTE#16#32;

CRCHi[72]:=BYTE#16#00; CRCLo[72]:=BYTE#16#36;

CRCHi[73]:=BYTE#16#C1; CRCLo[73]:=BYTE#16#F6;

CRCHi[74]:=BYTE#16#81; CRCLo[74]:=BYTE#16#F7;

CRCHi[75]:=BYTE#16#40; CRCLo[75]:=BYTE#16#37;

CRCHi[76]:=BYTE#16#01; CRCLo[76]:=BYTE#16#F5;

CRCHi[77]:=BYTE#16#C0; CRCLo[77]:=BYTE#16#35;

CRCHi[78]:=BYTE#16#80; CRCLo[78]:=BYTE#16#34;

CRCHi[79]:=BYTE#16#41; CRCLo[79]:=BYTE#16#F4;

CRCHi[80]:=BYTE#16#00; CRCLo[80]:=BYTE#16#3C;

CRCHi[81]:=BYTE#16#C1; CRCLo[81]:=BYTE#16#FC;

CRCHi[82]:=BYTE#16#81; CRCLo[82]:=BYTE#16#FD;

CRCHi[83]:=BYTE#16#40; CRCLo[83]:=BYTE#16#3D;

CRCHi[84]:=BYTE#16#01; CRCLo[84]:=BYTE#16#FF;

CRCHi[85]:=BYTE#16#C0; CRCLo[85]:=BYTE#16#3F;

CRCHi[86]:=BYTE#16#80; CRCLo[86]:=BYTE#16#3E;

CRCHi[87]:=BYTE#16#41; CRCLo[87]:=BYTE#16#FE;

CRCHi[88]:=BYTE#16#01; CRCLo[88]:=BYTE#16#FA;

CRCHi[89]:=BYTE#16#C0; CRCLo[89]:=BYTE#16#3A;

CRCHi[90]:=BYTE#16#80; CRCLo[90]:=BYTE#16#3B;

CRCHi[91]:=BYTE#16#41; CRCLo[91]:=BYTE#16#FB;

CRCHi[92]:=BYTE#16#00; CRCLo[92]:=BYTE#16#39;

CRCHi[93]:=BYTE#16#C1; CRCLo[93]:=BYTE#16#F9;

CRCHi[94]:=BYTE#16#81; CRCLo[94]:=BYTE#16#F8;

CRCHi[95]:=BYTE#16#40; CRCLo[95]:=BYTE#16#38;

CRCHi[96]:=BYTE#16#00; CRCLo[96]:=BYTE#16#28;

CRCHi[97]:=BYTE#16#C1; CRCLo[97]:=BYTE#16#E8;

CRCHi[98]:=BYTE#16#81; CRCLo[98]:=BYTE#16#E9;

CRCHi[99]:=BYTE#16#40; CRCLo[99]:=BYTE#16#29;

CRCHi[100]:=BYTE#16#01; CRCLo[100]:=BYTE#16#EB;

CRCHi[101]:=BYTE#16#C0; CRCLo[101]:=BYTE#16#2B;

CRCHi[102]:=BYTE#16#80; CRCLo[102]:=BYTE#16#2A;

CRCHi[103]:=BYTE#16#41; CRCLo[103]:=BYTE#16#EA;

CRCHi[104]:=BYTE#16#01; CRCLo[104]:=BYTE#16#EE;

CRCHi[105]:=BYTE#16#C0; CRCLo[105]:=BYTE#16#2E;

CRCHi[106]:=BYTE#16#80; CRCLo[106]:=BYTE#16#2F;

CRCHi[107]:=BYTE#16#41; CRCLo[107]:=BYTE#16#EF;

CRCHi[108]:=BYTE#16#00; CRCLo[108]:=BYTE#16#2D;

CRCHi[109]:=BYTE#16#C1; CRCLo[109]:=BYTE#16#ED;

CRCHi[110]:=BYTE#16#81; CRCLo[110]:=BYTE#16#EC;

CRCHi[111]:=BYTE#16#40; CRCLo[111]:=BYTE#16#2C;

CRCHi[112]:=BYTE#16#01; CRCLo[112]:=BYTE#16#E4;

CRCHi[113]:=BYTE#16#C0; CRCLo[113]:=BYTE#16#24;

CRCHi[114]:=BYTE#16#80; CRCLo[114]:=BYTE#16#25;

CRCHi[115]:=BYTE#16#41; CRCLo[115]:=BYTE#16#E5;

CRCHi[116]:=BYTE#16#00; CRCLo[116]:=BYTE#16#27;

CRCHi[117]:=BYTE#16#C1; CRCLo[117]:=BYTE#16#E7;

CRCHi[118]:=BYTE#16#81; CRCLo[118]:=BYTE#16#E6;

CRCHi[119]:=BYTE#16#40; CRCLo[119]:=BYTE#16#26;

CRCHi[120]:=BYTE#16#00; CRCLo[120]:=BYTE#16#22;

CRCHi[121]:=BYTE#16#C1; CRCLo[121]:=BYTE#16#E2;

CRCHi[122]:=BYTE#16#81; CRCLo[122]:=BYTE#16#E3;

CRCHi[123]:=BYTE#16#40; CRCLo[123]:=BYTE#16#23;

CRCHi[124]:=BYTE#16#01; CRCLo[124]:=BYTE#16#E1;

CRCHi[125]:=BYTE#16#C0; CRCLo[125]:=BYTE#16#21;

CRCHi[126]:=BYTE#16#80; CRCLo[126]:=BYTE#16#20;

CRCHi[127]:=BYTE#16#41; CRCLo[127]:=BYTE#16#E0;

CRCHi[128]:=BYTE#16#01; CRCLo[128]:=BYTE#16#A0;

CRCHi[129]:=BYTE#16#C0; CRCLo[129]:=BYTE#16#60;

CRCHi[130]:=BYTE#16#80; CRCLo[130]:=BYTE#16#61;

CRCHi[131]:=BYTE#16#41; CRCLo[131]:=BYTE#16#A1;

CRCHi[132]:=BYTE#16#00; CRCLo[132]:=BYTE#16#63;

CRCHi[133]:=BYTE#16#C1; CRCLo[133]:=BYTE#16#A3;

CRCHi[134]:=BYTE#16#81; CRCLo[134]:=BYTE#16#A2;

CRCHi[135]:=BYTE#16#40; CRCLo[135]:=BYTE#16#62;

CRCHi[136]:=BYTE#16#00; CRCLo[136]:=BYTE#16#66;

CRCHi[137]:=BYTE#16#C1; CRCLo[137]:=BYTE#16#A6;

CRCHi[138]:=BYTE#16#81; CRCLo[138]:=BYTE#16#A7;

CRCHi[139]:=BYTE#16#40; CRCLo[139]:=BYTE#16#67;

CRCHi[140]:=BYTE#16#01; CRCLo[140]:=BYTE#16#A5;

CRCHi[141]:=BYTE#16#C0; CRCLo[141]:=BYTE#16#65;

CRCHi[142]:=BYTE#16#80; CRCLo[142]:=BYTE#16#64;

CRCHi[143]:=BYTE#16#41; CRCLo[143]:=BYTE#16#A4;

CRCHi[144]:=BYTE#16#00; CRCLo[144]:=BYTE#16#6C;

CRCHi[145]:=BYTE#16#C1; CRCLo[145]:=BYTE#16#AC;

CRCHi[146]:=BYTE#16#81; CRCLo[146]:=BYTE#16#AD;

CRCHi[147]:=BYTE#16#40; CRCLo[147]:=BYTE#16#6D;

CRCHi[148]:=BYTE#16#01; CRCLo[148]:=BYTE#16#AF;

CRCHi[149]:=BYTE#16#C0; CRCLo[149]:=BYTE#16#6F;

CRCHi[150]:=BYTE#16#80; CRCLo[150]:=BYTE#16#6E;

CRCHi[151]:=BYTE#16#41; CRCLo[151]:=BYTE#16#AE;

CRCHi[152]:=BYTE#16#01; CRCLo[152]:=BYTE#16#AA;

CRCHi[153]:=BYTE#16#C0; CRCLo[153]:=BYTE#16#6A;

CRCHi[154]:=BYTE#16#80; CRCLo[154]:=BYTE#16#6B;

CRCHi[155]:=BYTE#16#41; CRCLo[155]:=BYTE#16#AB;

CRCHi[156]:=BYTE#16#00; CRCLo[156]:=BYTE#16#69;

CRCHi[157]:=BYTE#16#C1; CRCLo[157]:=BYTE#16#A9;

CRCHi[158]:=BYTE#16#81; CRCLo[158]:=BYTE#16#A8;

CRCHi[159]:=BYTE#16#40; CRCLo[159]:=BYTE#16#68;

CRCHi[160]:=BYTE#16#00; CRCLo[160]:=BYTE#16#78;

CRCHi[161]:=BYTE#16#C1; CRCLo[161]:=BYTE#16#B8;

CRCHi[162]:=BYTE#16#81; CRCLo[162]:=BYTE#16#B9;

CRCHi[163]:=BYTE#16#40; CRCLo[163]:=BYTE#16#79;

CRCHi[164]:=BYTE#16#01; CRCLo[164]:=BYTE#16#BB;

CRCHi[165]:=BYTE#16#C0; CRCLo[165]:=BYTE#16#7B;

CRCHi[166]:=BYTE#16#80; CRCLo[166]:=BYTE#16#7A;

CRCHi[167]:=BYTE#16#41; CRCLo[167]:=BYTE#16#BA;

CRCHi[168]:=BYTE#16#01; CRCLo[168]:=BYTE#16#BE;

CRCHi[169]:=BYTE#16#C0; CRCLo[169]:=BYTE#16#7E;

CRCHi[170]:=BYTE#16#80; CRCLo[170]:=BYTE#16#7F;

CRCHi[171]:=BYTE#16#41; CRCLo[171]:=BYTE#16#BF;

CRCHi[172]:=BYTE#16#00; CRCLo[172]:=BYTE#16#7D;

CRCHi[173]:=BYTE#16#C1; CRCLo[173]:=BYTE#16#BD;

CRCHi[174]:=BYTE#16#81; CRCLo[174]:=BYTE#16#BC;

CRCHi[175]:=BYTE#16#40; CRCLo[175]:=BYTE#16#7C;

CRCHi[176]:=BYTE#16#01; CRCLo[176]:=BYTE#16#B4;

CRCHi[177]:=BYTE#16#C0; CRCLo[177]:=BYTE#16#74;

CRCHi[178]:=BYTE#16#80; CRCLo[178]:=BYTE#16#75;

CRCHi[179]:=BYTE#16#41; CRCLo[179]:=BYTE#16#B5;

CRCHi[180]:=BYTE#16#00; CRCLo[180]:=BYTE#16#77;

CRCHi[181]:=BYTE#16#C1; CRCLo[181]:=BYTE#16#B7;

CRCHi[182]:=BYTE#16#81; CRCLo[182]:=BYTE#16#B6;

CRCHi[183]:=BYTE#16#40; CRCLo[183]:=BYTE#16#76;

CRCHi[184]:=BYTE#16#00; CRCLo[185]:=BYTE#16#72;

CRCHi[185]:=BYTE#16#C1; CRCLo[185]:=BYTE#16#B2;

CRCHi[186]:=BYTE#16#81; CRCLo[186]:=BYTE#16#B3;

CRCHi[187]:=BYTE#16#40; CRCLo[187]:=BYTE#16#73;

CRCHi[188]:=BYTE#16#01; CRCLo[188]:=BYTE#16#B1;

CRCHi[189]:=BYTE#16#C0; CRCLo[189]:=BYTE#16#71;

CRCHi[190]:=BYTE#16#80; CRCLo[190]:=BYTE#16#70;

CRCHi[191]:=BYTE#16#41; CRCLo[191]:=BYTE#16#B0;

CRCHi[192]:=BYTE#16#00; CRCLo[192]:=BYTE#16#50;

CRCHi[193]:=BYTE#16#C1; CRCLo[193]:=BYTE#16#90;

CRCHi[194]:=BYTE#16#81; CRCLo[194]:=BYTE#16#91;

CRCHi[195]:=BYTE#16#40; CRCLo[195]:=BYTE#16#51;

CRCHi[196]:=BYTE#16#01; CRCLo[196]:=BYTE#16#93;

CRCHi[197]:=BYTE#16#C0; CRCLo[197]:=BYTE#16#53;

CRCHi[198]:=BYTE#16#80; CRCLo[198]:=BYTE#16#52;

CRCHi[199]:=BYTE#16#41; CRCLo[199]:=BYTE#16#92;

CRCHi[200]:=BYTE#16#01; CRCLo[200]:=BYTE#16#96;

CRCHi[201]:=BYTE#16#C0; CRCLo[201]:=BYTE#16#56;

CRCHi[202]:=BYTE#16#80; CRCLo[202]:=BYTE#16#57;

CRCHi[203]:=BYTE#16#41; CRCLo[203]:=BYTE#16#97;

CRCHi[204]:=BYTE#16#00; CRCLo[204]:=BYTE#16#55;

CRCHi[205]:=BYTE#16#C1; CRCLo[205]:=BYTE#16#95;

CRCHi[206]:=BYTE#16#81; CRCLo[206]:=BYTE#16#94;

CRCHi[207]:=BYTE#16#40; CRCLo[207]:=BYTE#16#54;

CRCHi[208]:=BYTE#16#01; CRCLo[208]:=BYTE#16#9C;

CRCHi[209]:=BYTE#16#C0; CRCLo[209]:=BYTE#16#5C;

CRCHi[210]:=BYTE#16#80; CRCLo[210]:=BYTE#16#5D;

CRCHi[211]:=BYTE#16#41; CRCLo[211]:=BYTE#16#9D;

CRCHi[212]:=BYTE#16#00; CRCLo[212]:=BYTE#16#5F;

CRCHi[213]:=BYTE#16#C1; CRCLo[213]:=BYTE#16#9F;

CRCHi[214]:=BYTE#16#81; CRCLo[214]:=BYTE#16#9E;

CRCHi[215]:=BYTE#16#40; CRCLo[215]:=BYTE#16#5E;

CRCHi[216]:=BYTE#16#00; CRCLo[216]:=BYTE#16#5A;

CRCHi[217]:=BYTE#16#C1; CRCLo[217]:=BYTE#16#9A;

CRCHi[218]:=BYTE#16#81; CRCLo[218]:=BYTE#16#9B;

CRCHi[219]:=BYTE#16#40; CRCLo[219]:=BYTE#16#5B;

CRCHi[220]:=BYTE#16#01; CRCLo[220]:=BYTE#16#99;

CRCHi[221]:=BYTE#16#C0; CRCLo[221]:=BYTE#16#59;

CRCHi[222]:=BYTE#16#80; CRCLo[222]:=BYTE#16#58;

CRCHi[223]:=BYTE#16#41; CRCLo[223]:=BYTE#16#98;

CRCHi[224]:=BYTE#16#01; CRCLo[224]:=BYTE#16#88;

CRCHi[225]:=BYTE#16#C0; CRCLo[225]:=BYTE#16#48;

CRCHi[226]:=BYTE#16#80; CRCLo[226]:=BYTE#16#49;

CRCHi[227]:=BYTE#16#41; CRCLo[227]:=BYTE#16#89;

CRCHi[228]:=BYTE#16#00; CRCLo[228]:=BYTE#16#4B;

CRCHi[229]:=BYTE#16#C1; CRCLo[229]:=BYTE#16#8B;

CRCHi[230]:=BYTE#16#81; CRCLo[230]:=BYTE#16#8A;

CRCHi[231]:=BYTE#16#40; CRCLo[231]:=BYTE#16#4A;

CRCHi[232]:=BYTE#16#00; CRCLo[232]:=BYTE#16#4E;

CRCHi[233]:=BYTE#16#C1; CRCLo[233]:=BYTE#16#8E;

CRCHi[234]:=BYTE#16#81; CRCLo[234]:=BYTE#16#8F;

CRCHi[235]:=BYTE#16#40; CRCLo[235]:=BYTE#16#4F;

CRCHi[236]:=BYTE#16#01; CRCLo[236]:=BYTE#16#8D;

CRCHi[237]:=BYTE#16#C0; CRCLo[237]:=BYTE#16#4D;

CRCHi[238]:=BYTE#16#80; CRCLo[238]:=BYTE#16#4C;

CRCHi[239]:=BYTE#16#41; CRCLo[239]:=BYTE#16#8C;

CRCHi[240]:=BYTE#16#00; CRCLo[240]:=BYTE#16#44;

CRCHi[241]:=BYTE#16#C1; CRCLo[241]:=BYTE#16#84;

CRCHi[242]:=BYTE#16#81; CRCLo[242]:=BYTE#16#85;

CRCHi[243]:=BYTE#16#40; CRCLo[243]:=BYTE#16#45;

CRCHi[244]:=BYTE#16#01; CRCLo[244]:=BYTE#16#87;

CRCHi[245]:=BYTE#16#C0; CRCLo[245]:=BYTE#16#47;

CRCHi[246]:=BYTE#16#80; CRCLo[246]:=BYTE#16#46;

CRCHi[247]:=BYTE#16#41; CRCLo[247]:=BYTE#16#86;

CRCHi[248]:=BYTE#16#01; CRCLo[248]:=BYTE#16#82;

CRCHi[249]:=BYTE#16#C0; CRCLo[249]:=BYTE#16#42;

CRCHi[250]:=BYTE#16#80; CRCLo[250]:=BYTE#16#43;

CRCHi[251]:=BYTE#16#41; CRCLo[251]:=BYTE#16#83;

CRCHi[252]:=BYTE#16#00; CRCLo[252]:=BYTE#16#41;

CRCHi[253]:=BYTE#16#C1; CRCLo[253]:=BYTE#16#81;

CRCHi[254]:=BYTE#16#81; CRCLo[254]:=BYTE#16#80;

CRCHi[255]:=BYTE#16#40; CRCLo[255]:=BYTE#16#40;

IF EN THEN

CRCHigh:=BYTE#16#FF;

CRCLow:=BYTE#16#FF;

Data_index:=BYTE#16#01;

WHILE Data_index<=Data_length DO

Chart_index:= CRCHigh XOR Data1[Data_index];

CRCHigh:=CRCLow XOR CRCHi[Chart_index];

CRCLow:=CRCLo[Chart_index];

Data_index:=Data_index BYTE#16#01;

END_WHILE;

Data1[Data_index]:=CRCHigh;

Data_index:=Data_index BYTE#16#1;

Data1[Data_index]:=CRCLow;

CRC:=SHL(BYTE_TO_WORD (CRCHigh),8) OR BYTE_TO_WORD (CRCLow);

END_IF;

生成的功能块如下

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