Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 115)

7–28 Communication Commands
Publication 1770Ć6.5.16 - October 1996
shutdown
Asks the interface module to initiate either a PLC-3 shutdown
(if the computer has download privileges) or a freeze on file
allocations (if the computer has upload privileges). The computer
cannot issue this command until it has successfully transmitted an
upload or download request to the module.
CMD
0F
STS
FNC
07
TNS C
CMD
4F
STS TNS R
EXT
STS
The EXT STS field may be attached to the reply packet only when there is an error.
DST SRC
SRC DST
typed read (read block)
Reads a block of data from the processor starting at the PLC-5
system address plus the packet offset.
CMD
0F STS
FNC
68
TNS C
CMD
4F STS
TNS R TNS
DST SRC
SRC DST A
Packet
Offset
PLCĆ5 sys. address
Total
Trans
B
A - Type/data parameter. Used to specify
• type of data you are writing or reading
• size in bytes of each piece of data you are writing or reading
B - Data (up to 240 bytes minus the number of bytes used in the type/data parameter).
An EXT STS byte will replace A and B if there is an error. The first byte of the type/data parameter is the
flag byte, and has this format:
Size - number of elements to read from the specified system address.
Size
Bit 7 6 5 4 3 2 1
Flag Byte
Data Type ID Data Type Size
ID
format
field
Size
format
field
ID value field Size value field
0
• PLCĆ3
• PLCĆ5
• PLCĆ5/VME
• SLC 5/03
• SLC 5/04