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TECHNICAL INFORMATION
82 87-900-986-01 (
C
)
The addressed SLAVE will respond with an
ANSWER
whose structure depends from the
MESSAGE
type.
When the
MESSAGE
is a reading command, the SLAVE
will respond transmitting a string with the same
structure of the
MESSAGE
.
NOTE
Using the RS 485 interface, the message structure
remains 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:
Response Type
Response Length
Response 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 execution has been successfully
completed
NACK
1 byte
(0x15)
the command execution 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 Alphanumeric) is not accorded with
the specified Window
Out of Range
1 byte
(0x34)
the value expressed during a write command is
out of the range value of the specified window
Win Disabled
1 byte
(0x35)
the specified window is Read Only or temporarily
disabled (for example you can’t write the Soft Start when
the Pump is running)