Delta-electronics DELTA DUP-B Manuel d'utilisateur télécharger pdf (Page 378)

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Chapter 3 Creating and Editing Screens

Remark

 The calculation result can be stored as unsigned WORD.

 Var1 and Var2 can be internal memory only. Var3 can be internal memory or

constant.

Example

The starting address is for calculation $0, the data length is set to 2. After the

communication, the calculated checksum through addition calculation is stored in

$2 (this is an operation of unsigned 16-bit data).

 XORSUM (Use XOR to Calculate Checksum)

Equation

Var1 = XORSUM (Var2, Var3)

Explanation

This command uses XOR to calculate checksum. Var1 is the value after calculation,

Var2 is the starting address for calculation and Var3 is data length.

Remark

 The calculation result can be stored as unsigned WORD.

 Var1 and Var2 can be internal memory only. Var3 can be internal memory or

constant.

Example

The starting address is for calculation $0, the data length is set to 2. After the

communication, the calculated checksum through XOR calculation is stored in $2

(this is an operation of unsigned 16-bit data).

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Delta-electronics DELTA DUP-B Manuel d'utilisateur Page 378

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