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06.91
3
Interface Modules
For the computer link with SINUMERIK 8X0, there are corresponding interface modules which
are plugged in the COM area.
The modules are the interface between the local area networks or point-to-point connections
and the control system. The services at the physical layer through to the application layer such
as procedures, test methods, access mechanisms etc. required for communication are
implemented on the interface modules.
The connection-specific and application-oriented parameters are stored on the interface
modules in lists which are compiled by means of a configuring software executable on the PG
685.
The following interface modules are available:
•
Bus interface module (CP 231A)
The bus interface module is referred to as CP 231A. It allows connection to the SINEC H1
bus.
•
Basic board for serial connection (CP 315)
The basic board for serial connections provides a serial interface conforming with
RS 232C/TTY. The connector pin assignment determines whether the serial interface is
used as RS 232C or TTY interface. The board is called CP 315.
•
Expansion board for serial connection (CP 373)
To complement the CP 315 basic board there is an expansion board with the designation
CP 373. It is mounted on the side of the basic board and can be operated only together
with it. The CP 373 offers three further serial interfaces.
Dependent on the frame variant or the SINUMERIK 880 configuration, various configurations
are possible for the interface modules.
The following figure and table show examples of typical variants.
At application layer, the addressing concept of the computer link message frames is identical
for both bus and serial interface modules. It is implemented on the interface module by means
of SINUMERIK-specific input and output lists. In the case of a serial interface module,
message frames not corresponding to the SINUMERIK specifications can also be processed.
The addressing is carried out via internal lists.
Message frames can be transmitted between the bus interface and the serial interface module,
i.e. the message frames are not processed in the SINUMERIK but are passed from one
interface module to the other.
© Siemens AG 1989 All Rights Reserved
SINUMERIK 840/880 (PJ)
6FC5 197-0AB20-0BP0
3 Interface Modules
3–1
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