Agilent Technologies TV 301-P, User Manual

Page: 193 / 224

Technical Information
RS 232/RS 485 Communication Description
17
TV 301-P Navigator Controller User Manual / 87-901-001-01 (B) 193/224
NOTE
Using the RS 485 interface, the message structure re-mains identical to the one
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:
Table 5 Response types
Type Length Value Description
Logic 1 byte - After a read instruction of a logic
window
Numeric 6 bytes - After a read instruction of a numeric
window
Alphanumeric 10 bytes - After a read instruction of an
alphanumeric window
ACK 1 byte (0x6) The command execu-tion has been
successfully completed
NACK 1 byte (0x15) The command execu-tion has been
failed
Unknown
Window 1 byte (0x32) The specified window in the
command is not a valid window
Data Type Error 1 byte (0x33) The data type specified in the
command (Logic, Numeric or
Alphanu-meric) is not accorded with
the specified Win-dow
Out of Range 1 byte 0x34) The value expressed during a write
com-mand is out of the range value
of the specified window
Win Disabled 1 byte (0x35) The specified window is Read Only
or tempo-rarily disabled (for ex-
ample you can’t write the Soft Start
when the Pump is running)