Tabla de contenido
−
<DATA> = an alphanumeric ASCII string with
the data to be written into the window. In case
of a reading command this field is not present.
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 (A)
10
−
<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 addressed SLAVE will respond with an AN-
SWER 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>
Examples:
Command: START
Source: PC
Destination: Controller
02
80
30
30
30
STX ADDR
WINDOW
VALID
CHARACTERS
'0' = OFF
'1' = ON
'-', '.', '0' . . . '9' right
justified with '0'
from blank to '_' (ASCII)
31
31
03
42
33
WR
ON
ETX
CRC
Source: Controller
Destination: PC
02
80
06
03
STX ADDR ACK ETX
Command: STOP
Source: PC
Destination: Controller
02
80
30
30
STX ADDR
WINDOW
Source: Controller
Destination: PC
02
80
06
03
STX ADDR ACK ETX
Command: SOFT-START (ON)
Source: PC
Destination: Controller
02
80
31
30
STX ADDR
WINDOW
Source: Controller
Destination: PC
02
80
06
03
STX ADDR ACK ETX
Command: SOFT-START (OFF)
Source: PC
Destination: Controller
02
80
31
30
STX ADDR
WINDOW
Source: Controller
Destination: PC
02
80
06
03
STX ADDR ACK ETX
33
TECHNICAL INFORMATION
38
35
CRC
30
31
30
03
42
WR
OFF ETX
38
35
CRC
30
31
31
03
42
WR
ON
ETX
38
35
CRC
30
31
30
03
42
WR
OFF ETX
38
35
CRC
87-900-973-01
32
CRC
32
CRC
33
CRC
Tabla de contenido
