Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 207)

12–4 Uploading and Downloading with A-B Processors
Publication 1770Ć6.5.16 - October 1996
Procedure 1 — PLC-5/15/B processors, revision E and earlier
1. Place the PLC-5 processor in Program or Remote Program mode
using set CPU mode or the keyswitch on the front of the
processor. (For more on set CPU mode, see page
7–26 .)
2. Place the PLC-5 processor in Upload mode using upload all
request. This locks out all other users from accessing PLC-5
memory. (For more on upload all request, see page
7–33 .)
If a T50 is connected, it displays Download mode.
Important: Once upload all request is issued, the PLC-5
processor starts a 90 second timer. After 90
seconds, the processor automatically returns to
the previous mode of operation. If your upload
takes more than 90 seconds, you must reset the
timer by sending another upload all request
within the 90 second limit.
3. Upload the first 14 bytes of PLC-5 memory using read bytes
physical. (For more on read bytes physical, see page
7–19 .)
4. Upload the rest of PLC-5 memory starting at location 0A00 (hex)
to 3FF0 (hex).
Uploading PLC-5 memory
You can accomplish a complete upload of PLC-5 memory using
107 read bytes physical with a size of 128 bytes plus one read
bytes physical with a size of 112 bytes. (For more on read bytes
physical, see page
7–19 .) You can only read 112 bytes with a
physical read sent to address 3F80.
5. Exit Upload mode using upload completed. (For more on upload
completed, see page
7–34 .)
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