Matrix ETERNITY NE - Page 780

770 Matrix ETERNITY NE System Manual
Case 2: Busy Response from the CAS
The ETERNITY will retransmit an ENQ after 5 seconds until the CAS accepts the message or until 4 NAK
responses are received.
Case 3: No Response from CAS
The ETERNITY will retransmit an ENQ after 5 seconds until CAS responds or until 4 Unsuccessful ENQ
responses have been sent.
Case 4: Negative Response to data transfer
The ETERNITY will make a maximum of 3 attempts to send the message. If the message is still not
transmitted successfully, it will drop the message and proceed to the transmission of the next message.
Case 5: No Response to data transfer
ETERNITY to CAS CAS to ETERNITY
ENQ >
< NAK (CAS responds but cannot accept at this time)
ETERNITY to CAS CAS to ETERNITY
ENQ > (Wait for 5 seconds)
No Response
ETERNITY to CAS CAS to ETERNITY
ENQ >
< ACK
STX-(tex)-ETX-BCC >
< NAK
ENQ > (Wait for 3 seconds)
STX-(tex)-ETX-BCC > (Maximum of 3 tries)
< ACK
ETERNITY to CAS CAS to ETERNITY
ENQ >
< ACK
STX-(tex)-ETX-BCC > (Wait for 11 seconds)
No Response
ENQ >
< ACK
STX-(tex)-ETX-BCC > (Maximum of 3 tries)