Sur-Gard System Five, Руководство по эксплуатации

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5.0 Operation
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5.1.2.1.8 NACK from the receiver
If the console software receives a NACK while sending any command from the receiver, it re-sends the command up to four times. After the fourth
attempt, the console software generates an error in the command log to indicate that the command failed. If at any time in the sequence the system
receives an ACK to the message, the system accepts this and clears any counters for the previous failed attempts.
The application software generates different messages depending on the circumstance. This message is only generated after the fourth re-try:
Reason="Invalid Command" – This generates the message: "Invalid Command"
Reason="Corrupt" – This generates the message: "Unable to read command"
Reason="LC Absent" – This generates the message: "Line card not present"
5.1.2.1.9 No response from the console software
If the console software doesn’t respond to a command from the receiver, the receiver re-sends the command up to four times with an inter-attempt time
of four seconds. After the fourth attempt has timed out the receiver checks to see if there are any other commands being sent or ACK’ed/responded to.
If after this last attempt the application software still does not provide an ACK/Response, the SG-CPM5 gracefully closes the visual verification port. If
at any time in the sequence the system receives an ACK to the message the system accepts this and clears any counters for the previous failed attempts.
If the Console connection is closed, the receiver gracefully closes the TCP/IP socket connection.
5.1.2.1.10 No response from the receiver
SG-DRL5-IP – Visual verification
When the SG-DRL5-IP does not respond to a command from the application software, the application retransmits the command after four seconds up to
four additional times.
SG-CPM5 - SG visual commands
When the SG-CPM5 does not respond to commands from the application software, the application software retransmits the command after two seconds
up to four additional times. When the SG-CPM5/SG-DRL5 is not responding to the output transmissions, the SG-CPM5 generates a trouble.
5.1.2.2 Advanced output protocol specification
Please refer to the advanced output protocol for a detailed explanation of each of the commands.
5.2 Printer
5.2.1 Introduction
The SG-CPM5 has two printer ports, one for TCP/IP and one for serial. The SG-System 5 outputs internal and external events to these printer ports.
5.2.2 TCP/IP
The TCP/IP printer port is port 1027 and is connected via the Ethernet port on the back of the SG-CPM5. It can be connected using the console or a
third party printer application. A heartbeat must be generated by the application every 25 seconds to keep the TCP/IP port alive.