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Key Input Sequence
Programming Console Display
D1824D1823D1822
0012 5000 2000
The above procedure prepares DM 1824 for change, and new data can be
keyed in. Pressing the CHG key again moves the cursor to DM 1823. After
inputting data, press the write key to execute the rewrite. In the above exam-
ple, positioning action #0 of Unit #8 is shown.
When starting the Position Control Unit, the OUT refresh area is used. (The
OUT refresh area is comprised of the first five of the ten IR words allocated
to each Unit as refresh area. See
Section 3–4 for details.) The Busy flag and
present position status can be read from the IN refresh area, the last five of
these words.
To start the Unit, set (turn ON) the START command bit. This works regard-
less of whether the Unit is in RUN or PROGRAM mode. Do not shift the
mode between MONITOR and PROGRAM while pulses are being output.
Doing so will generate an error, preventing Unit operation.
Example: Starting Unit #8 in MONITOR or PROGRAM Mode
START (command)
Start input
18000
In the above example, IR 180 through IR 184 are allocated as the OUT re-
fresh area; IR 185 through IR 190, as the IN refresh area.
Special I/O Unit Restart Bits Restart bits in AR 01 can be used to transfer altered DM area data to the Po-
sition Control Unit without turning power off and on. Refer to
Section 6–3 for
Restart bit allocations. The following Programming Console operation exam-
ple shows how to access the restart bit for Unit #0. The ladder diagram sec-
tion below it shows how to achieve the same operation through program-
ming.
Programming Console Display
Key Input Sequence
A0101
^ OFF
Program example: Unit #1
Restart switch
DIFU(13) AR 0101
3–4
Data Configuration and Allocation
IR 100 through IR 199 are allocated as I/O refresh areas. Each Position Con-
trol Unit is allocated ten consecutive words. The first word for each Unit, des-
Starting
Data Configuration and Allocation