6100 MPS-B Programming Manual

WRITING APPLICATIONS THAT USE 6100 MPS-B
CONTROL Requests
Table 3-3. Requests and Responses in Order by Function Code
(Continued)
-----------------------------------------------------------------
| |
| Function Modifier |
| Request Name Code Code Description |
| |
| POLL/SELECT LIST 68 0 Define |
| CONTROL Poll/Select |
| List |
| 1 Enable |
| Continuous |
| Polling |
| 2 Enable Non- |
| continuous |
| Polling |
| 3 Halt Polling |
| 4 Remove All |
| Stations from |
| Nonresponding |
| List |
| 5 Define Slow |
| Poll List |
| |
-----------------------------------------------------------------
CONTROL Requests
The CONTROL request can be used for any of the following
functions:
• To send an explicit negative acknowledgement (EOT) in response
to a message received from a station. Also, this can be used
to cause the line to be reset following a read error.
• To CONNECT a switched line by raising Data Terminal Ready
(DTR) and waiting for Data Set Ready (DSR) to raise.
• To DISCONNECT a switched line by dropping DTR and waiting for
DSR to drop.
3-19