Motorola 68P02958C00-B - Manual (Page 29)

System Overview
2-9
Communicating with the IP Gateway
Once a channel has been established with the IP Gateway, the SCADA interface can issue
requests to the IP Gateway. The request categories are Send routines, Receive routines, Data
Analysis routines and Management routines.
Typical API sequence calls are the following:
Connect /* Establish Connection to Gateway. */
Poll /* Send a polling request. */
Receive /* Receive MDLC communication (answer) buffer. */
Get_next_message /* Extract one message from the MDLC communication buffer. */
Get_next_data_entity /* Get one data entity from the message buffer. */
Troubleshooting
The IP Gateway handles the communication with the SCADA in the REQMNG device.
Diagnostics on this device can help when troubleshooting the SCADA connectivity.
For more information on the REQMNG device, see the Software Diagnostics Output section.