Agilent Technologies TV 551 Notice De Mode D'emploi page 235

When the MESSAGE is a reading command, the SLAVE will respond
transmitting a string with the same structure of the MESSAGE.
Using the RS 485 interface, the message structure remains identical to the one
NOTE
used for the RS 232 interface, the only difference being that the value assigned
to the ADDRESS <ADDR>
The controller can answers with the following response types:
Tab. 6
Type
Logic
Numeric
Alphanumeric
ACK
NACK
Unknown Window
Data Type Error
Out of Range
Win Disabled
TV 551/701 SEM Navigator User Manual / 87-900-958-01(G)
RS 232/RS 485 Communication Description
Length Value
1 byte -
6 bytes -
10 bytes -
1 byte (0x6)
1 byte (0x15)
1 byte (0x32)
1 byte (0x33)
(0x34)
1 byte
1 byte (0x35)
Technical Information
Description
After a read instruction of a logic
window
After a read instruction of a
numeric window
After a read instruction of an
alphanumeric window
The command execution has been
successfully completed
The command execution has been
failed
The specified window in the
command is not a valid window
The data type specified in the
command (Logic, Numeric or
Alphanumeric) is not accorded with
the specified Window
The value expressed during a write
command is out of the range value
of the specified window
The specified window is Read Only
or temporarily disabled (for example
you can't write the Soft Start when
the Pump is running)
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