~HU - Return ZebraNet Alert Configuration
Sends the printer's configured alert destinations back to the host.
~HU returns the alert table that ^SX writes: which printer conditions report an
alert, where each alert goes, and whether the printer reports both the set and the
clear transition. It is the read side of a ZebraNet feature. A printer with no
configured alerts does not answer the command.
Syntax
~HUSupport
Accepted and skipped, because it configures the printer rather than the label. It cannot change the rendered output, and Labelary skips it too.
Returns the alert routing ^SX sets, over the printer's link. Alerts are a ZebraNet feature with no counterpart in a render request. The renderer does not parse this command. It reports IGNORED_COMMAND at info severity, which does not reach X-Warnings. Labelary is also silent, so the rendered label is identical in both engines. — not pinned by a test
Labelary renders this command.
Parameters
~HU takes no arguments.
Behavior
The reply is one line per configured condition, in ^SX's argument order: condition,
destination, condition-set flag, condition-clear flag, destination address, port. So
B,C,Y,Y,ADMIN@COMPANY.COM,0 sends ribbon-out to an e-mail address, and reports both
the arrival and the clearance of the condition. The guide states that a printer with
no ^SX alerts does not respond.
An alert describes a printer that monitors itself over a network. A render request has
no alert table and no link to return one on. The renderer ignores the command, and the
page is unchanged. It reports IGNORED_COMMAND at info severity, which does not reach
X-Warnings. Labelary is also silent.
Example
Reading the alert table alongside ordinary content. Only the content prints.
^XA
~HU
^FO50,50^A0N,40,40^FDAlert config^FS
^XZ
Related commands
^SXSet AlertConfigures where the printer reports an error condition: serial, parallel, email, TCP, UDP or SNMP.~HSHost Status ReturnSends three status strings describing the printer's current state back to the host.~HQHost QuerySends one of ten named printer reports back to the host.