Initialization; Table 25: Initialization Bit; Table 26: Initialization Of The I/O Module; Table 27: Data Exchange - WAGO 750 Series Manual

WAGO-I/O-SYSTEM 750
750-652 Serial Interface RS-232 / RS-485
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 25: 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 26: Initialization of the I/O module

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

Table 27: Data exchange

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

Table 28: I/O module is ready

Status byte 0
'0XXX. X0XX' '0XXX. 1XXX'
Manual
1.2.0
Control byte 1
'0000.0000'
Input byte 0
'XXXX. 1XXX' XX
Control byte 1
'0000.0000'
Status byte 1 Input byte 0
Output byte 0
XX
Input byte 1
XX
Output byte 0
XX
Input byte 1
XX XX
Commissioning
Output byte 1
XX
The I/O module is initialized.
Output byte 1
XX
The I/O module is ready.
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