Timeout and retry – IAI America TTA User Manual
Page 77
-77/85-
5. Timeout
and
Retry
The normal responses and error responses received by the master station (host) from the slave station (controller) must satisfy
all of the following conditions:
(1) The normal response or error response format is satisfied.
(2) The checksum (SC) is correct.
(3) The station number in the transmitted command is the same as the station number in the reception response.
(4) The message ID in the transmitted command is the same as the message ID in the reception response (except in the
case of error response).
If completion of reception of a normal response or error response that satisfies the above conditions cannot be confirmed within a
specified period (3 seconds) after completion of command transmission, the master station (host) will attempt to restore
communication via command retransmission (retry transmission). When the number of retry transmissions exceeds the upper
limit (2 or 3, selected in accordance with the system), the system shall recognize an irrecoverable communication error.