Addressing Lists Of The Serial Interface Module - Siemens SINUMERIK 840 Planning Manual

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3.5.2

Addressing lists of the serial interface module

The procedure driver, the device management and the SINUMERIK driver evaluate and
generate the protocol and message frame header on the serial interface module if these are
configured (figure "Message frame processing using CP 315").
The necessary data for this purpose are stored in lists which are located on the interface
module. These lists are configurable.
3.5.2.1 For message frames with AS 512 protocol and with identification
(FMS message frames)
Processing in input direction
The procedure driver of a serial interface recognizes that the connected communication
partner wants to send a message frame to the SINUMERIK and manages the processes
necessary to control the data flow. After error-free reception of the message frame at
procedure level, the procedure driver passes the message frame data to the device
management.
The device management evaluates the entries of the AS 512 header and makes internal
allocations from the combination of interface number and AS 512 parameter. The device
management takes the necessary information from the interface list and the addressing list.
Then the device management routes the message frame to the SINUMERIK driver.
The SINUMERIK driver evaluates the SINUMERIK header (identification) of the SINUMERIK
message frame. It assigns a SINUMERIK-internal code (function number) to the header
information and determines the address data to be passed on within the SINUMERIK. The
SINUMERIK driver takes the necessary information from input list 1.
The SINUMERIK driver routes the message frame to the dual port RAM and stores there the
corresponding address data which were determined from input list 1. On the basis of these
address data the message frame is passed on within the SINUMERIK by the COM area.
Processing in output direction
A message frame which is to be sent is first stored by the COM area in the dual port RAM.
The COM area also stores the system-internal addressing data belonging to the message
frame in the dual port RAM. Then the SINUMERIK driver is informed via a control bit that a
message frame which is ready to be sent is waiting in the dual port RAM whereupon the
SINUMERIK driver generates the SINUMERIK header for this message frame. It takes the
necessary information from output list 1. Then the SINUMERIK driver passes the message
frame on to the device management.
The device management generates the AS 512 header and uses the internal addressing data
by assigning the message frame to the corresponding interface to which the addressed
communication partner is connected. The information required by the device management is
stored in the interface list and the addressing list. The device management transfers the
message frame to be sent to the procedure driver.
The procedure driver informs the connected station that the SINUMERIK want to send a
message frame and manages the necessary processes to transmit data at procedure level.
© Siemens AG 1989 All Rights Reserved
SINUMERIK 840/880 (PJ)
3.5.2 Addressing lists of the serial interface module
6FC5 197-0AB20-0BP0
3 Interface Modules
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