How to enable the force inspection in BLC?

How to enable the force inspection in BLC?

First, in the printer panel, the applicator can only take effect when the IO board is installed.

Corresponding ZPL commands: 
Applicator port mode: 1
device.applicator.end_print
This command allows you to control an online verifier or applicator device. 
To set the value for the applicator port mode:
! U1 setvar "device.applicator.end_print" "1"

Values
• off（To disable the IO board function, it needs to be set to off.）
• 1 =End Print signal normally high, and low only when the printer is moving
the label forward.
• 2 = End Print signal normally low, and high only when the printer is moving
the label forward.
• 3 = End Print signal normally high, and low for 20 ms when a label has been
printed and positioned.
• 4 = End Print signal normally low, and high for 20 ms when a label has been
printed and positioned.

Start Print Mode: Level Mode
In the setvar example below, the "level" start print mode of operation.
! U1 setvar "device.applicator.start_print_mode" "level"
The explanations of two settings:
• "level" = the Start Print signal does not need to be de-asserted to print the next label. As long as the
Start Print signal is low and a label is formatted, a label prints.
• "pulse" = the Start Print signal must be de-asserted before it can be asserted for the next label

Error on Pause: Enable
To set whether device applicator errors will be displayed:
! U1 setvar "device.applicator.error_on_pause" "enabled"

Applicator Reprint: Active Low
! U1 setvar "device.applicator.reprint" "low"