Configuration And Parameterization Via Gsd For Profibus Dp And Profinet Io; Data Transfer; Example Of Operating Modes For Serial Transmission - WAGO 750 Series Manual

52 Commissioning
Input operating mode!
In case of a change of operating mode, a warning appears that points out that it
may be necessary to change the wiring.
8.2 Configuration and Parameterization via GSD for
PROFIBUS DP and PROFINET IO
Other methods are available for configuration depending on the fieldbus
coupler/controller. These are described in the appendix.
Pos : 82.6 /Dokumentation allgemei n/T est/Romeo/750-0652_Datenaus tausc h/Anwendungsbeispi el Betriebsart Datenaus tausc h 750- 0652 @ 15\mod_1365578802733_21.doc x @ 116900 @ 233333443443 @ 1
8.3

Data Transfer

The following chapters describe data transfer in all operating modes for serial
transmission and in the Data Exchange operating mode.
8.3.1

Example of Operating Modes for Serial Transmission

The control of the transmission and receipt operation is handled with the control
and status byte. Requests are indicated by the change (toggle) of a bit. The
successful processing is indicated by an assigned bit. It takes the value of the
request bit.
Initialize I/O module:
• Setting of IR in control byte C0
• Initialization of the I/O module
• Blocking of the transmit and receive functions
• Deletion of the transmit and receive memory
• Loading of the configuration data in the serial I/O module
Transmit data:
• TR=TA: Writing of the characters to be transmitted in output bytes D0 to
Dn
• Number of characters to be transmitted is specified in OL0 to OL5
• Inversion and output of TR
• Transfer to the output buffer takes place when TR=TA
Receive data:
RR≠RA: in input byte 0 to n characters are available
•
• Number of characters received is specified in IL0 to IL5
• Reading out of the characters in IL0 to IL5
• 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.
WAGO-I/O-SYSTEM 750
750-652 Serial Interface RS-232 / RS-485
Manual
1.2.0