14 • 750-650 (/xxx-xxx) [Serial Interface RS 232 C]
Datatransfer
WAGO-I/O-SYSTEM
750
Busklemmen
2.1.1.9.1 Example
The module is initialized.
The initialization bit in the control byte is set.
Output byte 0
Control byte
Output byte 2
Output byte 1
0x00 '0000.0100' 0x00
0x00
After the initialization has been executed, the status byte will give back
000.0100.
Input byte 0
Status byte
Input byte 2
Input byte 1
XX
'0XXX. X0XX'
XX
XX
Module is still being
reset.
XX '0XXX.
X1XX'
XX
XX
Initialization
completed.
Sending of the data string "Hello”
The first 3 characters and the buffer length of 3 are transmitted.
Output byte 0
Control byte
Output byte 2
Output byte 1
"H" (0x48)
'0011.0000'
"1" (0x6C)
"a" (0x60)
The transmission request bit (TR) is inverted.
Output byte 0
Control byte
Output byte 2
Output byte 1
"H" '0011.0001' "1"
"a"
As soon as TR=TA, the rest of the data can be sent.
Input byte 0
Status byte
Input byte 2
Input byte 1
XX
'0XXX.XXX0'
XX
XX
The data is still
being transferred.
XX '0XXX.XXX1' XX
XX
Data
transfer
completed.
