User`s guide

3: ADCCP NRM DLI Functions
DC 900-1317J 59
specify the usProtCommand field (DLI_PROT_SEND_EXCHANGE_ID), the usProtXParms[0] field
(station ID), the
usProtXParms[1] field (data size), and the data field contents. The data
size may be zero because the data field is optional.
The client sends an Exchange ID packet either to initiate an exchange of station identi-
fication on the link or to respond to a
DLI_PROT_RECV_EXCHANGE_ID packet (see
Section 3.4.7). The client initiates an ID exchange at a primary station and replies at a
secondary station. Exchange of station identification consists of the exchange of an XID
command and XID response on the link. When the client initiates the ID exchange, the
ICP replies with a
DLI_PROT_RECV_EXCHANGE_ID packet containing the remote station’s
identification. When the ICP initiates the exchange of ID, the client replies with a
DLI_PROT_SEND_EXCHANGE_ID packet containing the local station’s identification.
3.4.7 DLI_PROT_RECV_EXCHANGE_ID Packet
This packet is valid only if the client has enabled ADCCP option 1 (see Section 3.4.20.2)
for the specified station and the station is not in the initialization state. The ICP speci-
fies the
usProtCommand field (DLI_PROT_RECV_EXCHANGE_ID), the link ID, the
usProtXParms[0] field (station ID), the usProtXParms[1] field (data size), and the data
field contents. The
iProtModifier field is zeroed and, because the data field is optional,
the data size may be zero.
The client may receive this packet either as a response to sending a
DLI_PROT_SEND_EXCHANGE_ID packet (see Section 3.4.6) to the ICP or as an unsolicited
ICP packet. When the client initiates the ID exchange, the ICP replies with a
DLI_PROT_RECV_EXCHANGE_ID packet containing the remote station’s identification. When
the ICP initiates the exchange of ID, the client replies with a
DLI_PROT_SEND_EXCHANGE_ID
packet containing the local station’s identification.
3.4.8 DLI_PROT_SEND_NORM_DATA Packet
This packet is valid for primary stations unless the client has enabled ADCCP option 9
(see Section 3.4.20.2) for the specified primary station. The packet is valid for secondary