4. PROTOCOL
IMAE02-E3
20
4.1.1 Polling procedures
(1) Data link initialization
Host computer sends EOT to the AE500s to initiate data link before polling sequence.
(2) Data sent from host computer - Polling sequence
Host computer sends polling sequence with the format shown below:
1. Device address (2 digits)
The device address specifies the AE500 to be polled and each AE500 must have its own unique
device address.
For details, see 3.3 Device Address Setting (P. 6).
2. Identifier (2 digits)
The identifier specifies the type of data that is requested from the AE500.
For details, see 4.3 Communication Identifier List (P. 28).
3. ENQ
The ENQ is the transmission control character that indicates the end of the polling sequence. The
ENQ must be attached to the end of the identifier. The host computer then must wait for a
response from the AE500.
(3) Data sent from the AE500
If the polling sequence is received correctly, the AE500 sends data in the following format:
Device
address
3.2.1.
Identifier
ENQ
1
ENQ
M02
Example:
Identifier Data BCCETXSTX
3.2. 5.4.1.
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