Example - WAGO I/O-SYSTEM 750 Manual

2.1.1.9.1

Example

The module is initialized.
The initialization bit in the control byte is set.
After the initialization has been executed, the status byte will give back
000.0100.
Sending of the data string "Hello"
The first 3 characters and the buffer length of 3 are transmitted.
The transmission request bit (TR) is inverted.
WAGO-I/O-SYSTEM 750
I/O Modules
Output byte 0
0x00
Input byte 0 Status byte
XX '0XXX. X0XX'
XX '0XXX. X1XX'
Output byte 0
"H" (0x48)
Output byte 0
"H"
750-653 (/xxx-xxx) [Serial Interface RS 485]
Control byte Output byte 2
'0000.0100'
Input byte 2
XX
XX
Control byte Output byte 2
'0011.0000'
Control byte Output byte 2
'0011.0001'
Data transfer
Output byte 1
0x00
Input byte 1
XX Module is still being
XX Initialization
completed.
Output byte 1
"1" (0x6C) "a" (0x60)
Output byte 1
"1"
• 15
0x00
reset.
"a"