CRC16

 Function - Calculates a CRC16 on the characters of a string.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	STRING				Character string.

Outputs

Output	Data Type	Range	Unit	Description
Q	INT			CRC16 calculated on all the characters of the string.

Remarks

• The function calculates a Modbus CRC16, initialized at 16#FFFF value.

FBD Language Example

FFLD Language Example

• In the FFLD Language, the input rung (EN) enables the operation.
  • The output rung (ENO) keeps the same value as the input rung.
  • The function is executed only if EN is TRUE.

IL Language Example

• In the IL Language, the input must be loaded in the current result before calling the function.

Op1: LD    IN
     CRC16
     ST    Q

ST Language Example

Q := CRC16 (IN);