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ISTRUZIONI ORIGINALI
The field length is variable according to the
data type as per the following table:
DATA TYPE
FIELD
LENGTH
Logic (L)
1
Numeric (N)
6
Alphanumeric
10
(A)
− <ETX> (End of transmission) = 0x03
−
<CRC> = XOR of all characters subsequent to
<STX> and including the <ETX> terminator.
The
value is hexadecimal coded and indicated by
two ASCII character.
The controller can answers with the following response types:
Response Type
Logic
Numeric
Alphanumeric
ACK
NACK
Unknown Window
Data Type Error
Out of Range
Win Disabled
VALID
CHARACTERS
'0' = OFF
'1' = ON
'-', '.', '0' . . . '9' right
justified with '0'
from blank to '_'
(ASCII)
Response
Response Value
Length
1 byte
6 bytes
10 bytes
1 byte
1 byte
(0x15)
1 byte
(0x32)
1 byte
(0x33)
1 byte
(0x34)
1 byte
(0x35)
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.
Using the RS 485 interface, the message structure re-
mains identical to the one used for the RS 232 inter-
face, the only difference being that the value assigned
to the ADDRESS <ADDR>.
-
after a read instruction of a logic window
-
after a read instruction of a numeric window
-
after a read instruction of an alphanumeric
window
(0x6)
the command execution has been success-
fully 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 ac-
corded with the specified Window
the value expressed during a write command
is out of the range value of the specified win-
dow
the specified window is Read Only or tempo-
rarily disabled (for example you can't write
the Soft Start when the Pump is running)
100/105
TECHNICAL INFORMATION
NOTE
Description
87-901-005-01(A)
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