Chapter A — Error Handling
ESim for the PC4 and PF8 Printers Programmer’s Reference Manual 157
• The commands UN and US turn off or on most of the error
output information.
• The command eR specifies the format of the error output
information.
Parallel Port
When an error occurs, the parallel port marks error status by setting
pin 12 to an active state.
Error Recovery/Output
When an error occurs, the printer typically enters a waiting loop and
waits for the operator to handle the error. During this “Error Waiting
Loop” only the commands ^ee and ^@ can be executed.
The error recovery is often performed by pressing the Feed button.
This releases the printer from the waiting loop and sends recovery
information on the serial line (RS-232 or USB), normally <XON>.
For direct recovery, see also commands USA or USB.
Error-Handling Commands
This table lists and describes the error-handling commands.
Error-Handling Commands
Command Description
US[A][B][E] Optional error reporting.
UN No error reporting.
eR User defined error/status character
control.
^ee Error report - immediate
^@ Reset
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