IPDS for Control Units
Figure 40. Reporting IPDS Errors in DSC (BSC-Attached) Mode
Notes:
1. At the end of this sequence, the printer remains in IPDS mode if no
End-of-Chain structured field has been received.
2. Zero or more command sequences may occur without the ARQ flag being
sent. These sequences repeat as in command sequence (1) except all data
is ignored. After the ARQ flag is received, the NACK is sent a final time with
the Persist bit off. This completes the NACK reply sequence.
3. If the printer generates an Intervention Required (IR) or Equipment Check
(EC) NACK, the IR or EC status is returned in response to the next 3270
command.
188 6400 IPDS
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