HP 5100tn Printer Job Language - Technical Reference Manual - Page 119

Comments: If your application has status readback capability, you can request the default setting of any valid environment variable. The returned value indicates the User Default Environment value for the feature. Since the DINQUIRE command returns only the value for one feature, you must send multiple DINQUIRE commands for data about more than one feature. If the printer does not support the variable, the response is: @PJL DINQUIRE [LPARM:personality | IPARM:port] ~variable "?" If a printer language-specific variable is not available because that printer language is not installed or is invalid, or if a port-specific variable is not available because that port is not supported, the command will return an appropriate error code if USTATUS DEVICE=VERBOSE is enabled. Note The LPARM : personality option must be used when requesting printer language-specific information. The IPARM : port option must be used when requesting port-specific information. Status Readback Commands 7-11