IPDS for Control Units
Figure 29. Asynchronous NACK in LU-1 Mode. Change Direction not issued immediately after signal.
In Figure 30, the host issues an End Destination Select and no Change Direction.
Figure 30. Asynchronous NACK in LU-1 Mode. EDS issued after Signal.
Note: At the end of this sequence, the printer is no longer in IPDS mode nor
does the host read the NACK.
Appendix B. Summary of IPDS for Control Units 175
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