Initialization; Table 32: Initialization Bit; Table 33: Initialization Of The I/O Module; Table 34: Data Exchange - WAGO 750-652/040-000 Manual

60 Commissioning
• Inversion and output of RA
• Reading out has taken place when RR = RA
The transmission and receipt of data between controller and I/O module can take
place simultaneously. The initialization request is executed with priority and
immediately ends the transmission and receipt of data.
Reset initialization bit!
The initialization bit in control byte C0 must be reset. As long as the initialization
bit is set, no data is exchanged. The initialization bit can be reset simultaneously
with transmission of the initial data.
Always read received data!
The input buffer of the I/O module is 80% full if the BUF_F bit is set in status
byte 0. If the input buffer if full, the I/O module cannot receive any further data
via the serial interface. Any data transmitted by an external device is lost.
8.3.2

Initialization

The I/O module is initialized.
The initialization bit is set in the control byte 0.

Table 32: Initialization Bit

Control byte 0
'0000.0100'
The execution of the initialization is acknowledged by the I/O module with the
setting of the bit IA.

Table 33: Initialization of the I/O Module

Status byte 0 Status byte 1
XXXX. X1XX'
Control requests data exchange:

Table 34: Data Exchange

Control byte 0
'0000.0000'
The IA bit is reset by the I/O module.

Table 35: I/O Module is Ready

Status byte 0
'0XXX. X0XX'
Manual
Version 1.3.0
750-652/040-000 Serial Interface RS-232/RS-485 XTR
Control byte 1
'0000.0000'
Input byte 0
'XXXX. 1XXX' XX
Control byte 1
'0000.0000'
Status byte 1 Input byte 0
'0XXX. 1XXX' XX
WAGO-I/O-SYSTEM 750 XTR
Output byte 0
XX
Input byte 1
XX The I/O module is initialized.
Output byte 0
XX
Input byte 1
XX The I/O module is ready.
Output byte 1
XX
Output byte 1
XX