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Technical Information
RS 232/RS 485 Communication Description
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
232/266
Length
Value
1 byte
-
6 bytes
-
10 bytes
-
1 byte
(0x6)
1 byte
(0x15)
1 byte
(0x32)
1 byte
(0x33)
1 byte
(0x34)
1 byte
(0x35)
TV 401/301 MS User Manual / 87-901-013-01 (B)
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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