
7–9Communication Commands
Publication
17706.5.16 - October 1996
enable outputs
Returns control of the outputs to the 1774-PLC ladder diagram
program. Use this command to cancel the effect of disable outputs.
CMD
07
STS
FNC
01
TNS
C
CMD
47
STS
TNS
R
DST SRC
SRC DST
enable PLC scanning
Restarts the 1774-PLC processor’s program scanner after a physical
write has been performed.
CMD
07
STS
FNC
03
TNS
C
CMD
47
STS
TNS
R
DST SRC
SRC DST
enter download mode
Puts the PLC-2 processor in the download mode. Use this command
on a PLC-2 node before sending a physical write to the node.
CMD
07
STS
FNC
04
TNS
C
CMD
47
STS
TNS
R
DST SRC
SRC DST
Important: For early revisions of the 1771-KA2 and the industrial
terminal, when you send an enter download/upload
mode, the industrial terminal port is disabled until you
send an exit download/upload mode. When the
industrial terminal port is disabled, the industrial
terminal enters the mode select state. To leave this
state, you must manually select a mode at the industrial
terminal.
If you are using Use
•1771KA/A revision F
•1771KG/A
enter download mode before sending physical read
commands.
•1771KA2/B
•1771KG/B or later
enter upload mode before sending physical read
commands.
• 1774PLC
• 1774PLC
• PLC2
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