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LINE SECTIONALIZING USING A PLC AND ABB PROTECTIVE RELAY
Figure 12. Transfer Logic for Control Instruction Parameterization
NETWORK 9- Figure 12:
As explained above, if the pointer in the FIFO vectors to a control instruction, then the FILE 2 data
corresponding to that pointer must be transferred to 40110 in the MSTR instruction. This network does
just that. The 6X address is calculated by the MULT instruction and then passed as an argument to the
XMRD instruction. Upon execution of the XMRD instruction, the data is transferred into the MSTR block.
If the FIFO instruction in the buffer is a WRITE instruction, then the pointer placed in the buffer is
multiplied by 10 to get the block of data to transfer to the MSTR data register buffer 40110. The multiplier
for instructions are:
PTR = 1 Block 0 Add 0 to pointer for FILE 2 60000
PTR = 2 Block 1 Add 10 o pointer for FILE 2 60010
PTR = 3 Block 2 Add 20 pointer for FILE 2 60020
PTR = 4 Block 3 Add 30 to pointer for FILE 2 60030
PTR = 5 Block 4 Add 40 to pointer for FILE 2 60040
PTR = 6 Block 5 Add 50 to pointer for FILE 2 60050
PTR = 7 Block 6 Add 60 to pointer for FILE 2 60060
PTR = 8 Block 7 Add 70 to pointer for FILE 2 60070
... and so on, and so on ....
NOTE – The data is transferred if the function code in 40100 = 2 (write), else the data is meaningless.
NETWORK 10 – FIGURE 13
This network is only a latch in which once the buffer FIFO contains an entry.
Page 10 of 53
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