Xerox 3270 manual

3270 Programmer’s Guide IBM Related Functions If formatting problems occur at the initial installation of the converter, these problems may be solved by selecting the settings matching the appropriate IBM RPQs. However, as the RPQ settings interact to a great extent, it is recommended that you contact your point of purchase for details. 4.4. IRQ Time IRQ (Intervention Required) is a 3270 command which signals to the host that action is required at the device (paper out, forms jam, etc. ) Function Y46, IRQ Time, allows you to adjust the period from the error occurs until the IRQ signal is sent to the host. The value of this function should not be too low, as a pause may arise in the printing, when the system fills up the printer buffer with e.g. complicated graphics or several copies. IRQ may be completely disabled. This can be useful as some systems will retransmit the last buffer after the intervention required message. This means that the buffer contents will be printed twice and that the form feed may be placed wrongly in the data stream. Function Y46 has 3 parameters: • • • Printer error Hold time out Busy time out An IRQ will be sent to the host if the time defined in one of the parameters expires. As the signals on the Centronics may differ from one printer to the other and as the serial output (if supported) is not only related to the printer but also to the serial cable used, the converter will act differently de pending on which printer is connected. In the following you will find examples of how various signals are interpreted and handled. The Centronics or serial signals are stated with capital letters. • If a "FAULT" or "PAPER ERROR" signal is received by the converter, it is handled as a printer error. • If a "DESELECT" signal is received but no "FAULT" or "PAPER ERROR", it is handled as a hold situation. - 25 -