Envoy Application Programming Manual

BISYNC Centralized Multipoint Supervisor Protocol
Envoy Application Programming Manual—427159-001
4-44
Programming Examples
Table 4-17 lists the error codes that can occur during a continuation WRITE operation.
Programming Examples
The figures on the next few pages show the following operations:
•
Polling and reading messages from a tributary station
•
Selecting and writing messages to a tributary station
Both operations are shown using the same example program. The example program is
located in the supervisor station of a centralized multipoint network. The supervisor
program accepts a message from the home terminal, or from a tributary station, and
sends the message to the designated (supervisor or tributary) station.
Figure 4-10
shows the station addresses that the supervisor program represents in the
multipoint network.
Table 4-17. Continuation WRITE Error Codes
Error Code Description
0 No error (successful completion)
163 EOT received
165 RVI received
166 ENQ in response to message
171 No response to poll or selection
172 Reply not proper for protocol
173 Transmission error
174 WACK received as text acknowledgment
175 Incorrect ACK
177 Text overrun