Section 8 – Automation Communication Formats
8–13
8.4.7.6 Link Test Request
The automation computer can send a link test request to the MX8000 receiver to test the communication
link between the receiver and the automation computer. The automation computer simply sends a <$0D>
and the MX8000 receiver will respond.
8.5 ADEMCO 685 Automation Protocol
8.5.1 Low Speed 3x1, 4x1, and 4x1 Express Automation Protocols
When the MX8000 is operating in the ADEMCO 685 mode and receives a 3x1, 4x1, and 4x1 Express
transmission, the output protocol to the computer is as shown in Figure 8–1. Note that when a 3x1
transmission is received, the account number will be padded to 4 characters by the addition of a leading 0 to
the account number.
LFRG 1234 ECR
TERMINATOR (ASCII CARRIAGE RETURN - HEX 0D)
EVENT CODE
SPACE (ASCII SPACE CHARACTER - HEX 20)
RECEIVER NUMBER
ACCOUNT NUMBER
GROUP NUMBER
HEADER (ASCII LINE FEED - HEX 0A)
SPACE (ASCII SPACE CHARACTER - HEX 20)
Figure 8–1: 685 3x1, 4x1, 4x1 Express Protocol
8.5.2 Low Speed 4x2 and 4x2 Express Automation Protocols
When the MX8000 is operating in the ADEMCO 685 mode and receives a 4x2 or 4x2 Express transmission,
the output protocol to the computer is as shown in Figure 8–2.
LFRG 1234 E ZCR
TERMINATOR (ASCII CARRIAGE RETURN - HEX 0D)
EVENT CODE (SECOND DIGIT)
SPACE (ASCII SPACE CHARACTER - HEX 20)
SPACE (ASCII SPACE CHARACTER - HEX 20)
EVENT CODE (FIRST DIGIT)
ACCOUNT NUMBER
GROUP NUMBER
SPACE (ASCII SPACE CHARACTER - HEX 20)
RECEIVER NUMBER
HEADER (ASCII LINE FEED - HEX 0A)
Figure 8–2: 685 4x2 and 4x2 Express Protocol
8.5.3 ADEMCO High Speed Automation Protocols
When the MX8000 is operating in the ADEMCO 685 mode and receives an ADEMCO High Speed
transmission, the output protocol to the computer is as shown in Figure 8–3.
