Azbil C35 Series

7-11
Chapter 7. CPL COMMUNICATION FUNCTION

Fixed length random data read command (RU command)
This command reads random data in two-byte units.

Send message
The data address (four hexadecimal digits) of the data to be read is sent in the
specified order.
0 0
R U
(1) Fixed length random data write command
(2) Sub-command: xed to "00".
(3) Data address 1
(4) Data address 2 to (n-1)
(5) Data address n
(5)(1) (2) (3) (4)
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Response message
If the message is sent successfully, the termination code is taken to be normal
(two decimal digits) and returned appended with the number of read data (four
hexadecimal digits X number of read data) specified by the command. If message
transmission ends in error, the termination code is taken to be in error (two
decimal digits) and returned without the read data.
7 - 6 List of Termination Codes (p.7-15).
• Normal termination
• Abnormal termination
X
(1)
X
The abnormal termination code is entered at XX.
For details of codes,
(1) Termination code
(2) Data 1
(3) Data 2 to data (n-1)
(4) Data n
0
(1)
0
(2) (3) (4)
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Maximum number of read data per message
Up to 28 words for both RAM and EEPROM areas