Toshiba B-EP Series Interface Specification page 363

5.13 COMMANDS RELATED TO CHECK
5.13.1 HEAD BROKEN DOTS CHECK COMMAND
Function Checks the thermal head for broken dots.
Format [ESC] HD001 (, a) [LF] [NUL] --- All thermal elements are checked.
Term a:
Explanation
(1) The Head Broken Dots Check Command is subject to batch processing. If the Label
Issue Command to issue 100 labels is transmitted before the Head Broken Dots Check
Command, the head broken dots check will be executed after 100 labels have been
issued.
(2) In case of the all thermal elements check, all thermal elements of the thermal head will be
checked.
However, for the B-EP4DL-GHxx, although an error is detected outside the effective print
width area, a head broken elements error is not indicated because the head width is
larger than the effective print width.
(3) When the check result is found to be normal under the condition that the check result
status is not returned, the next command is processed. If the check result is found to be
abnormal, an error occurs. Whether or not the status is returned when an error occurs
depends on the Issue Command setting.
When the check result is found to be normal under condition that the check result status
is returned, a status indicating the normal end of the head broken elements check is sent.
After that, the next command is processed. If the check result is found to be abnormal, a
status indicating the head broken elements error is sent, and then the printer stops.
Status for normal end for other than TEC protocols,
[SOH] [STX] "0020000" [EXT] [EOT] [CR] [LF]
Status for normal end for TEC protocols,
[ACK]
Status for head broken elements error
(4) The following shows the time to check all thermal elements:
Examples [ESC] C [LF] [NUL]
[ESC] RC001; Sample [LF] [NUL]
[ESC] RC002; 001 [LF] [NUL]
[ESC] XS; I, 0002, 0002C3000 [LF] [NUL]
[ESC] HD001 [LF] [NUL]
Check result status response (Omissible)
A: Status is returned
(If omitted, the check result status is not returned.)
[SOH] [STX] "1720000" [EXT] [EOT] [CR] [LF]
B-EP2DL-GHxx
B-EP4DL-GHxx
CHAPTER 5 TPCL-LE MODE (INTERFACE COMMANDS)
[ESC] HD
Approx. 2 seconds
Approx. 5 seconds
5-193
B-EP Series