HP 3330mfp HP PCL/PJL reference - Printer Job Language Technical Reference Man - Page 118
PJL INFO VARIABLES command returns the PJL Current, LaserJet 4PJ only
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Note The permissible variables and range of values for each variable may not be the same in all HP LaserJet printer models. See Appendix A for a list of valid variables, or send the @PJL INFO VARIABLES command to request this information directly from the printer. • value - This parameter is the returned value of the requested variable. For example, if you send the @PJL INQUIRE COPIES command, and the PJL Current Environment setting is 65, the returned value is 65, indicating 65 copies. See Appendix A for variable names for each parameter. Parameters: Parameter personality port variable value Variable Names+ PCL ESCP POSTSCRIPT (other personalities may be supported) PARALLEL SERIAL Supported on HP LaserJet 4PJ only Valid variables for each printer are listed in Appendix A. Acceptable values for each variable are also listed in Appendix A. Comments: If your application has status readback capabilities, you can request the current setting of any valid environment variable. Since the INQUIRE command returns only the value for one feature, you can send multiple INQUIRE commands to request information about more than one feature. If you need information about many variables, the PJL INFO VARIABLES command returns the PJL Current Environment settings for all environment variables. If the printer does not support the variable, the response is: @PJL INQUIRE [LPARM:personality | IPARM:port] ~variable "?" 7-6 Status Readback Commands EN