WAGO I/O-SYSTEM 750, User'S Installation And Configuration

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I/O modules • 249
TTY interface 750-651
Modular I/O System
ETHERNET TCP/IP
An 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” in ASCII code:
-The first 3 characters and the buffer length of 3 are transmitted.
Output
byte 0
Control
byte
Output
byte 2
Output
byte 1
‘H’ (0 x 0011.0000 ‘l’ (0 x 6C) ‘e’ (0 x 60) Entering data to module
-The transmission request bit (TR) is inverted.
Output
byte 0
Control
byte
Output
byte 2
Output
byte 1
‘H’ 0011.0001 ‘l’ ‘e’ Send Data
-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.
-The last 2 characters and the buffer length of 2 are transmitted.
Output byte 0 Control byte Output byte 2 Output byte 1
‘l’ 0010.0001 XX ‘o’ (0 x 6F)
-The transmission request bit (TR) is inverted.
Output byte 0 Control byte Output byte 2 Output byte 1
‘l’ 0010.0000 XX ‘o’