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Hash.CRC16

Calculates 16bit CRC value.

Component Version macOS Windows Linux Server iOS SDK
Hash 16.0 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "Hash.CRC16"; InputType; InputData { ; InputEncoding; StartValue; Poly; FinalXOR; ReflectInput; ReflectOutput } )   More

Parameters

Parameter Description Example Flags
InputType The type of input.
Can be Text, Container, Image, Path, PDF, Data, base64 or Hex.		 "Text"
InputData The actual input data.
Text, container or file path.		 "Hello World"
InputEncoding The text encoding for text input.
Parameter is ignored for other cases.		 "UTF-8" Optional
StartValue The start value for the CRC.
Default is 65535.		 65535 Optional
Poly The polynom to use.
Default is 4129 = hex 1021

e.g.
* hex 3D65 for DNP, IEC 870, M-BUS, wM-BUS and others
* hex 1021 for CCITT, X.25, V.41, HDLC FCS, Bluetooth and others
* hex 8005 for IBM, ModBus, USB, Bisync, CRC-16, CRC-16-ANSI and others
* hex 8BB7 for SCSI DIF
* hex 0589 for DECT Cordeless Telephones
* hex A02B for ACARS Aplications		 4129 Optional
FinalXOR The final XOR.
Pass 0 to skip.		 0 Optional
ReflectInput Whether to flip input bits.
Default is 0 to no flip.		 0 Optional
ReflectOutput Whether to flip output bits.
Default is 0 to no flip.		 0 Optional

Result

Returns number or error.

Description

Calculates 16bit CRC value.
You can fill the parameters to get very different CRC variations.

Examples

Try CRC with CCITT and 0xFFFF as start value:

Let ( [
    r = MBS("Hash.CRC16"; "Text"; "123456789"; "UTF-8"; 65535; 4129);
    h = MBS("Math.DecToHex"; r)
]; r & " " & h)

Example result: 10673 000029B1

Try CRC with CCITT and 0 as start value for XMODEM:

Let ( [
    r = MBS("Hash.CRC16"; "Text"; "123456789"; "UTF-8"; 0; 4129);
    h = MBS("Math.DecToHex"; r)
]; r & " " & h)

Try CRC with MODBUS:

Let ( [
    r = MBS("Hash.CRC16"; "Text"; "123456789"; "UTF-8"; 65535; 40961; 0; 1; 0);
    h = MBS("Math.DecToHex"; r)
]; r & " " & h)
// poly is hex A001, which is reflected 8005

See also

Release notes

Blog Entries

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Created 28th November 2025, last changed 28th November 2025


HadErrors - Hash.CRC32