Control Table (L9_MRTM)
(Original Document)
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Introduction
The second table used by this function block is the control table.
It contains the information which is specific to an individual function block.
This allows the same program table to be shared among several L9_MRTM function blocks.
This will reduce PLC memory usage to a minimum.
Control Table
The format of the control table is shown below:
Word
Description
%MWxxx
reserved for future use
%MWxxx+1
The %MWxxx+1word contains the word address of the first output word that is traffic-copped.
This parameter is input by the user.
%MWxxx+2
Specifies the %IW word used for the echo of the command register of the instruction block.
This parameter is input by the user.
%MWxxx+3
Pointer to the program table.
This pointer is maintained by the L9_MRTM.
%MWxxx+4
Error mask is a bit-mapped mask generated each scan to help the user debug a non-functioning L9_MRTM.
Error numbers are as follows: 1 end of table is before start of commands 2 table size is not an even multiple of transfer size 4 program pointer is not aligned with start of instruction block 8 invalid word on control table 16 invalid program pointer on control table 32 trough 32768 not used