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8. Command and Response Structure8. Command and Response Structure8. Command and Response Structure8. Command and Response Structure8. Command and Response Structure
8.8 “^AE” RESPONSE FORMAT
The meter’s response to “^AE[nn]<CR>” is 4 bytes of data, sent as 8 HEX-ASCII
characters, followed by a carriage return (no other characters even when programmed
to echo). These four bytes are:
1: Serial Recognition Character below; e.g., “*”, sent HEX-ASCII “2A”)
2: Device ID (INF-B)
3: Bus Format Byte (“bUS.FMt”; e.g., HEX-ASCII “5C” for multipoint mode with echo)
4: Serial Communications Configuration Byte (“COMM”: e.g., HEX-ASCII “56” for
2 stop bits, even parity, and 19200 baud)
8.9 EXAMPLES:
The following are examples of the different commands and their proper responses from
meters. For the following examples assume that:
a) echo mode
b) “*” as the recognition character of the meter
c) meter’s address is “15 HEX” if it is used in the multipoint mode
d) no line feed or checksum characters are included
1. Read serial recognition character from EEPROM in point-to-point mode:
Command format *R1E<CR>
Response format R1E2A<CR>
(Since “2A” is HEX-ASCII value of “*” in the table).
2. Read serial address from the RAM of the meter number “15 HEX” in the multipoint
mode:
Command format *15G1A<CR>
Response format 15G1A15<CR>
3. Write “VLT” as units of measure into the EEPROM of the meter in the point-to-point
mode:
Command format *W1F564C54<CR>
Response format W1F<CR>
where 56, 4C, 54 are the three HEX ASCII values for V, L, and T respectively.
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