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where:
<STX>=
0x02
<ADDR> =
0x80 (for RS 232 and
RS 422 only)
<ADDR> =
0x80 + device number (0...31)
0xFF: brodcasting command
(recognized by all the devices, it
doesn't implicate any answer)
(for RS 485 only)
<WINDOWS>=
' 000 '...' 999' window number
the meaning of the window
depends to the device type
<COMMAND>=
0x30: window value reading
0x31: window writing
<DATA> =
alphanumeric ASCII string
containing, in the case of writing
operation,the parameter to input
into the window addressed by
the field <WINDOW>This field
may have variable length
according to the data type
contained in the window where
you are working in. In the case of
reading request of a window, the
data field doesn't exist.
<ETX>=
0x03
<CRC>=
XOR among all the characters
following <STX>=(with
exception of <STX>), including
the end character <ETX>
hexadecimally encoded by two
ASCII characters.
When a slave device is addressed by the master:
In case of reading request of the value contained in
a window, the slave answers a string equal to the
one sent by the master but in addition there is the
field <DATA> containing the value of the window.
The format of the field <DATA> depends to the
window type.
The different types are:
Length
Logic (L)
1
Numeric (N)
6
Alphanumeric (A)
max 10
Characters
Permitted
'0'=OFF
'1'=ON
'0'...'9'
(Justifield to the right
with '0')
' '...'_'
EXAMPLES:
Command : START
Source
: PC
Destination : Inverter
02
80
30
STX
ADDR
WINDOW
Source
: Inverter
Destination : PC
02
80
06
STX
ADDR
ACK
Command : STOP
Source
: PC
Destination : Inverter
02
80
30
STX
ADDR
WINDOW
Source
: Inverter
Destination : PC
02
80
06
STX
ADDR
ACK
Command : SOFT-START (ON)
Source
: PC
Destination : Inverter
02
80
31
STX
ADDR
WINDOW
Source
: Inverter
Destination : PC
02
80
06
STX
ADDR
ACK
Command : SOFT-START (OFF)
Source
: PC
Destination : Inverter
02
80
31
STX
ADDR
WINDOW
Source
: Inverter
Destination : PC
02
80
06
STX
ADDR
ACK
77
TECHNICAL INFORMATION
03
30
30
31
31
WR
ON
ETX
03
38
35
ETX
CRC
03
30
30
31
30
WR OF
ETX
F
03
38
35
ETX
CRC
30
30
31
31
03
WR
ON
ETX
03
38
35
ETX
CRC
30
30
31
30
03
WR OF
ETX
F
03
38
35
ETX
CRC
87-900-902-01 (L)
42
33
CRC
42
32
CRC
42
32
CRC
42
33
CRC
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