Delta DVP-15MC Series, Руководство по эксплуатации

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DVP-15MC Series Motion Controller Operation Manual
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Bit string Integer
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Time, date
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Data
●
Length
●
OutOrder
●
CRC16
●
Note:
The symbol
●
indicates that the parameter is allowed to connect to the variable or constant of the data type.

Function Explanation
CRC16 instruction is used to calculate the CRC value of the specified data.
The instruction performs the calculation of the CRC value according to the starting address specified by
Data and number of bytes specified by Length .
The calculation result is put in the output parameter CRC16 . The arrangement for the bytes of the CRC
value is specified by OutOrder .

Precautions for Correct Use
The input variables are not allowed to omit. An error will occur during the compiling of the software if any
input variable is omitted.

Programming Example

The variable table and program
Variable name Address Data type Current value
CRC_EN BOOL TRUE
IN_Data
%MB100
ARRAY[1..6] OF BYTE [16#01,16#03,16#10,16#01,16#00,16#02]
IN_Length UINT 6
IN_OutOrder BOOL FALSE
OUT_CRC WORD 16#910B

When CRC_EN changes from FALSE to TRUE, the CRC16 instruction checks the 6 bytes
[16#01,16#03,16#10,16#01,16#00,16#02] in IN_Data.
The calculation result is 16#910B which is put in OUT_CRC.
CR C
E N EN O
Data Out
Length
OutOrder
ADR (IN _Data[1])
IN _Lengt h
IN_OutOrder
OUT_CR C
CR C EN
_