IPDS for Control Units
Figure 32. Synchronous ACK/NACK in LU-1 Mode. Change Direction not issued immediately after Signal.
Notes:
1. The printer processes the data sent by the host after the Signal.
2. After the host sends a Change Direction to the printer, the printer sends the
ACK/NACK detected before the Signal.
In Figure 33, the host sends an End Destination Select (EDS) after the Signal
sent by the printer. The host sends no Change Direction.
Figure 33. Synchronous ACK/NACK in LU-1 Mode. EDS issued after Signal.
Appendix B. Summary of IPDS for Control Units 177
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