User guide

Software
890 USE 108 00 August 2001 67
Middle Node Content
The data area comprises a group of contiguous holding registers. The 4x register
entered in the middle node is the first holding register in the group.
For the Write operation, the data area is the source of the data.
For the Read operation, the data area is the destination of the data.
Bottom Node Content
The bottom node contains the length (the number of 4x registers) of the data
area. The range is 1 ... 100.
Relocating Logic
from One 984 to
Another
The only constraints on logic relocation are that the program in the source controller
must generate logic that implements only instruction and/or function blocks
acceptable to the target controller. Also, the size of the source logic program must
not exceed the memory limits of the target controller.
For a detailed description of relocating 984 logic and its operations, see the Modsoft
Programmer User Manual (890 USE 115 00).
Note: The PCMCIA card does not allow a Write command to change 0 bits (in the
card) to 1 bits. Therefore, each segment in a PCMCIA card must be erased before
you can write to any location in the segment. Only an Erase command can make
this change.