Ipds Operating States; Home State; Overlay State; Font State - Ricoh MP 6002 User Manual

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1. IPDS Overview

IPDS Operating States

If the host sends a command inappropriate for the printer state, the printer returns an error code

identifying the error and follows Exception Handling Control processing.

The following actions can force the printer to home state, regardless of the current state of the printer:

1. The Set Home State (SHS) command

2. The Execute Order Anystate--Discard Buffered Data (XOA/DBD) command

3. The printer's transmission of a NACK to the host

4. The Arctic link-level Clear command

5. Any non-IPDS print order in NDS (New Display System)

6. An NDS Reset order

7. An NDS System Status Available No Mode order

All these actions will also force the printer to an IPDS command boundary if it is not already on one. To

interpret SHS or XOA/DBD, the printer and the host must already be in agreement as to where the IPDS

command boundaries are.

Deactivation of fonts with the DF command occurs in Home State.

Overlays can be nested to a depth of 6 as indicated in the STM Overlay Command-Set Vector, see

"Overlay Command Set", IPDS Technical Reference 2.

An operating state for downloading single-byte Coded Font patterns, Font Character Sets, and Code

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