Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 119)

7–32 Communication Commands
Publication 1770Ć6.5.16 - October 1996
unprotected write
1774-PLC, PLC-2, PLC-3, PLC-5
Writes words of data into any area of PLC and PLC-2 data table
memory. In PLC-3 and PLC-5 processors, the data is written into the
PLC-2 compatibility file.
C
CMD
08
STS TNS ADDR
R STS TNS
CMD
48
Data (max. 244 bytes) DST SRC
SRC DST
SLC 500, MicroLogix 1000
Writes data to a common interface file (CIF). The SLC CIF is data
file number 9; the MicroLogix CIF is integer file 7.
CMD
08
STS TNS
CMD
48
STS TNS
DST SRC
SRC DST
Address
C
R
Low High
Address - Logical offset into the CIF. Value is in words or bytes as shown below:
SLC 500, SLC 5/01 and SLC 5/02 (SLC 5/02 prior to series C FRN 3) processors use word addressing
SLC 5/02 series C FRN 3 and later, SLC 5/03, and SLC 5/04 processors select word or byte addressing
for S:2/8 = 0 (default) Ċ word addressing is used
for S:2/8 = 1 Ċ byte addressing is used
Data - Data to be written. This size of the data is implied by the number of data bytes sent.
for SLC 500, SLC 5/01 and SLC 5/02 processors: valid range is 0 Ć 94 bytes (odd or even)
for SLC 5/03 and 5/04 processors - with internet protocol: valid range is 0 Ć 223 bytes (odd or even)
without internet protocol: valid range is 0 Ć 234 bytes (odd or even)
Data (size implied by
data sent)
• 1774ĆPLC
• PLCĆ2
• PLCĆ3
• PLCĆ5
• SLC 500
• MicroLogix 1000