Rockwell Automation 1771-QA Stepper Positioning Assembly User Manual User Manual
Page 56
3–34
Programming and Operation
Publication 1771-UM002A–EN–P – May 2000
•
1 write block transfer file - 64 words for the temporary storage of
data to be write block transferred.
•
1 read block transfer (buffer) file - When the block transfer read
instruction is set to default, 00, this file uses four words for axis
1, seven words for axis 2 or ten words for axis 3. The balance of
this file can store other data because the balance is not used by
the read block transfer instruction.
•
1 status file - four words for axis 1, seven words for axis 2 or ten
words for axis 3, for storing validated status data.
The minimum and maximum number of words typically required
for the files are summarized in Table 3.A.
Table 3.A
Size of Data Files
Number of Data Table Words
Data Table File
1 Move
1 Axis
10 Move
1 Axis
10 Move
3 Axis
status file
4
4
10
temporary status buffer
4
[1]
4
10
write block transfer file
10
[1]
64
64
jog file
10
10
3 x 10
moveset file
Total
10
__
38
64
_____
146
3 x 64
[2]
_______
306
[1]
When programming only one move for 1 axis, block length default values need
not be used. Set the block length to the maximum number of words transferred.
[2]
If multiple movesets are programmed, add 64 words maximum per axis per addi-
tional moveset.
Data Table Documentation Forms
Data table forms are available for recording the assignment of files
(publication 5044) and for recording move data contained in the files
(Moveset Data form). These forms can be found at the end of this
manual and should be reproduced as needed.
Data Table Expansion
The Mini-PLC-2/15 and PLC-2/30 data tables are factory configured
to 128 words. The number of 128-word data table sections can be
increased to store the positioning profile data. This can be done
using the data table configuration function. Press [SEARCH][5][0]
on the industrial terminal keyboard when the PC processor is in
program mode. Enter the required number of 128-word sections.
The [CANCEL COMMAND] key terminates this function.