User`s guide

2: DDCMP DLI Functions
DC 900-1343D 53
2.6.2.8 DDCMP Maintenance Message Received [140]
This exception is caused by the reception of a DDCMP maintenance message when the
link is not in maintenance mode (Section 3.7 on page 58). The message is ignored and
the link is halted.
2.6.2.9 Control Message Received in Maintenance Mode [200]
This exception indicates that a normal DDCMP control message was received while in
maintenance mode state two (maintenance mode on). The DDCMP control message
type is indicated by the high-order of the
pOptArgs.usProtSequence field as follows:
1 = ACK
2 = NAK
3 = REP
6 = START
8 = STACK
2.6.2.10 Data Message Received in Maintenance Mode [201]
This exception indicates that a normal DDCMP data message was received while in
maintenance mode.
2.6.3 Confirmation Responses
Refer back to Table 2–11 on page 48 for a list of the possible DDCMP confirmation
response codes returned in the
dlRead pOptArgs.usProtCommand field. All of the
responses can return an error code in the
dlRead pOptArgs.iICPStatus field to indicate
failure.
2.6.4 Reports in Response to dlWrite Information Requests
After issuing a dlWrite information request (Section 2.5.2 on page 44), you must issue
a
dlRead request to receive the report information. Refer back to Table 2–11 on page 48
for a list of the available reports. The report formats are shown in Section 2.5.2.1
through Section 2.5.2.3.
10/97 Leslie:
These last two
were
confusing, but
Fred and I
agreed to leave
them in the
category of
circuit
exceptions.