Point-To-Point Link    S5-95U, Second Serial Interface
          :L   KF +72
          :L   FW 252 Scan to determine whether all 32 DW have
          :!=F already been copied
          :JC  =M002 then jump to receive mailbox enable
          :L   FW 252 otherwise, data word numbers are 
          :ADD KF +1 incremented by 1
          :T   FW 252
          :L   FW 254
          :ADD KF +1
          :T   FW 254
          :JC  =M003 and next data word is copied
          :
     M002 :AN  F  61.7 Enable receive mailbox again for
          :S   F  61.7 new frame
          :
     M001 : Send data
==============================================
          :AN  F   1.0 if no request to send,
          :BEC end
          :
          :O   F   1.1 if transmitting disabled or
          :O   F  62.7 if send request active then
          :JC  =M004 jump to pulse edge evaluation ”Send ready”
          :
          :AN  F   1.1 Disable transmission since the send mailbox
          :S   F   1.1 must not be changed during transmission
          :L   KY 64.1 Enter frame length (here = 64 bytes) and
          :T   DW  80 destination number (here = 1 for slave 1) in 
          : 1st DW of the send mailbox
          : Net data must be entered in DW 81 to DW 112 
          : at this point.
          :AN  F  62.7
          :S   F  62.7 Enable transmitting in the KBS and
          :R   F   1.2 reset edge auxiliary flag
     M004 : Pulse edge evaluation ”Transmission terminated”
          :AN  F  62.7 if KBS bit 7 changes from 1 to 0 and
          :AN  F   1.2 edge auxiliary flag is not set,
          :=   F   1.3 Edge ”Transmission terminated”
          :U   F   1.3 in case of negative edge, 
          :S   F   1.2 set auxiliary flag again
          :
          :A   F   1.3 If transmission terminated and
          :AN  F  62.0 no errors have occurred during transmission,
          :R   F   1.0 reset send initiation bit,
          :R   F   1.1 reenable transmission
          :
          :A   F   1.3 If transmission terminated and
          :A   F  62.0 errors have occurred during transmission,
          :R   F   1.1 enable transmission for repeat
          :BE
DescriptionFB100   AWL (continued)
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2-10
EWA 4NEB 812 6095-02