Black Box manual Operation, Printer Sharing, A/C-7P RO, A/C-7S RO

Models: A/C-7S RO A/C-7P RO

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5. Operation

A/C-7P RO, A/C-7S RO

5. Operation

5.1 Printer Sharing

The A/C-7P RO and A/C-7S RO allow the printer to be shared automatically between an attached PC/LAN and an IBM coax host. Simply connect the PC/LAN printer server to the parallel/serial port. The A/C-7P RO can supply external devices attached to its parallel sharing port with 5V up to 350 mA. See Appendix E for instructions on how to transfer power to pin 18 on the A/C-7P RO. The A/C-7 RO uses a timeout after each print job before it honors print jobs from another port.

At the end of a host print job, the A/C-7P RO waits for the specified Host Port Timeout period before it honors data streams coming in through the parallel port. The Host Port Timeout period is set through Host/PC download command 51.

After a parallel or serial print job is completed, the A/C-7 RO will again wait for a period of time before it honors host print jobs. The Sharing Port Timeout is set through Host/PC download command 50.

If the PC print job is sent while a host job is printing, the printer responds as “busy” to the PC print request. The print job can be spooled through a spool program, sent to the printer when the host job is finished or if the PC’s printer port is set for infinite retry through the DOS “Configure Printer” command (described in the DOS manual), the print job waits for the printer to be available to receive the data.

By default, the A/C-7S RO sends data at 96N81 (9,600 baud; parity = none; word length = 8 bits; stop bits

=1). Make sure that the printer and the A/C-7S RO are using the same serial parameters. The A/C-7S RO’s Serial-Out parameters can be changed using the second (right) bank of switches located on the front panel.

Also make sure that the A/C-7S RO’s Serial-In settings are the same as those of the PC/LAN. Note that when printing from the share por, the slowest baud rate (Serial-In, Serial-Out) will determine the print speed.

The A/C-7S RO’s Serial In parameters can be changed through Host/PC download commands 76 through 79.

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Black Box manual Operation, Printer Sharing, A/C-7P RO, A/C-7S RO