6100 MPS-B Programming Manual

6100 MPS-B LINK MANAGEMENT
READ State
• The retry count is exhausted on either a READ request or the
READ part of a WRITEREAD. The corresponding status codes are
162, 163, 172, 173, and 177. (See Section 3 for descriptions
of the errors.) For status codes 163, 172, and 177, the state
changes to CONTROL. For status codes 162 and 173, the
completion state is not known--issue a CONTROL Send EOT
request to ensure a return to CONTROL state.
-----------------------------------------------------------------
| |
| Original State: READ |
| |
| Request Status Code Description New State |
| |
| READ 140 Modem error DISCONNECT |
| 161 6100 error DISCONNECT |
| 162 Timeout Unknown; use |
| Send EOT |
| 163 EOT received CONTROL |
| 172 Format error in CONTROL |
| received data |
| 173 Bad BCC or other Unknown; use |
| data error Send EOT |
| 177 Received text CONTROL |
| too large |
| 190 6100 error DISCONNECT |
| other READ |
| |
| WRITEREAD 0 Normal completion: SELECT-TEXT |
| ACK or text if ACK; |
| READ if text |
| 140 Modem error DISCONNECT |
| 161 6100 error DISCONNECT |
| 162 Timeout Unknown; use |
| Send EOT |
| 163 EOT received CONTROL |
| 172 Format error in CONTROL |
| received data |
| 173 Bad BCC or other Unknown; use |
| error in data Send EOT |
| sent or received |
| 177 Received text CONTROL |
| too large |
| 190 6100 error DISCONNECT |
| other READ |
| |
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Figure 2-5. Completion Codes to Leave READ State
(Page 1 of 2)
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