Intermec EasyCoder PD4 Programmer's Reference Manual page 157

Error recovery/output
The normal action at any error is to stop in a waiting loop to recover the
error feature. At this "Error Waiting Loop" only command ^ee and ^@
can be performed and executed.
The error recovery, often performed by pressing the FEED key, releases
the error and sends recovery information on the serial line (RS-232 or
USB), normally <XON>.
See also commands USA or USB for direct recovery.
Error-handling commands
Optional Error Reporting
US[A][B][E]
No Error Reporting
UN
User Defined Error/Status Character Control
eR
Error Report - Immediate
^ee
Reset
^@
ESim v5.12 for EasyCoder PD4—Programmer's Reference Manual
Appendix A — Error-Handling
151