`^BL` LOGMARS

LOGMARS barcode, the US military's Code 39 with a mandatory check digit.

^BL prints a LOGMARS barcode, the US military's Code 39 variant, which always adds a mod-43 check digit; ^BLN,100,N draws it 100 dots high with the text below.

Barcodes · Updated 2026-10-20

Syntax

^BLo,h,g

Parameters

Parameter	What it does	Values
`o`	Rotation.	N, R, I, B
`h`	Bar height, in dots.	default: ^BY's
`g`	Put that line above the code.	Y or N; default N

Common mistakes

LOGMARS always adds the mod-43 check digit and always prints the text line below unless g = Y.

Example

Edit the code and the label redraws. This is the same engine as the API.

Preview

100%

^BL example rendered by the OpenZPL engine — Output of this example

Questions

What does ^BL do in ZPL?

^BL prints a LOGMARS barcode, the US military's Code 39 variant, which always adds a mod-43 check digit; ^BLN,100,N draws it 100 dots high with the text below.

What is the syntax of ^BL?

^BLo,h,g

What should I watch out for with ^BL?

LOGMARS always adds the mod-43 check digit and always prints the text line below unless g = Y.

Related commands

^BY Bar Code Field Default ^BC Code 128 ^B3 Code 39 ^B2 Interleaved 2 of 5 ^BE EAN-13 ^B8 EAN-8 ^BU UPC-A ^B9 UPC-E

^BL LOGMARS