- Hewlett-Packard Printer Owner's Manual

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Print Masters equipped with Option 19 (Cascade Option) are
configured exactly as described in Section 7.2 or Section 7.3 of this
manual with the exception of SET UNIT ID NUMBER. Each 710 Print
Master with Option 19 is configured individually through Port 10.
During operation, Port 10 is typically used to cascade to another Print
Master. Therefore, you should make the necessary configuration
changes to each unit prior to cabling the units together. Please
review the following configuration notes for cascading 710 models.
1. Each 710 model must be assigned a unique Unit ID Number
(see Appendix B.1.3 ). This number is used to direct a print job
to a specific unit in the cascaded chain. Port 10 of a 710
having a lower Unit ID Number will connect to Port 9 of a 710
having a higher Unit ID Number. For example, if you have two
710s with Unit ID Numbers of 1 and 2 respectively, Port 10 of
Unit 1 would connect to Port 9 of Unit 2.
2. The serial configuration (i.e., baud rate, word size, etc.) of
cascading ports on interconnected units must match.
Following our example in NOTE 1 above, the serial
configuration of Port 10 on Unit 1 must match that of Port 9 on
Unit 2.
On Print Master 710C only, Ports 9 and 10 will always be set to
the same configuration. If you change the configuration of Port
9, Port 10 will match this configuration automatically and vice
versa. This is not applicable on the 710E or 710F units.
3. Cascaded 710 units must be configured with the same Printer
Select Code.
4. Cascaded units should operate in Printer Select Mode 2.
5. If the number of printers is changed on a unit, the Unit
ID Assignment Number on all computer ports will
automatically reset to that unit's ID number.