Rockwell Automation T71xx Regent+Plus Processor Modules 110 VAC, 220/240VAC and 24VDC - Manual (Page 7)

Processor Modules (T7110, 11, 12, 20, 21, and 22)
P D - 7 0 0 0 S e p - 0 4 (Issue 1)
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The system’s memory lock status is voted: If at least two processor
modules are locked, the system is memory locked, if at least two
processor modules are unlocked, the system memory is unlocked.
Power Indicator
The green POWER indicator is on when the module is receiving
adequate power and its internal power supply is healthy.
Reset Button
A reset button is used to initiate the voted reset function. A voted
reset clears system fault indicators after a fault has been detected
and a module has been removed and replaced.
Pressing the reset buttons on two operating modules performs a
voted reset. During a voted reset, the processors continue to
execute the application programs and fault reporting is temporarily
suspended. If a new processor module has been inserted it is
synchronized and automatically educated by standard diagnostic
tests performed by the system. At the end of the voted reset all of
the internal fault status bits are reset and normal fault reporting is
enabled.
The time it takes the system to complete a voted reset may range
from a couple seconds to a few minutes. Larger processor memory
sizes and application program scan times will result in longer voted
reset times. However, during the voted reset, the system always
continues to read and write I/O, solve application programs and
perform communications functions normally.
Memory Lock Keyswitch
The memory lock keyswitch is used to prevent changes or
modifications to the system’s application programs. When the
memory lock keyswitch is in the off position, programs can be
modified.
The system’s memory lock status is voted: If at least two processor
modules are locked the system is memory locked, if at least two
processor modules are unlocked, the system memory is unlocked.
In W
INTERPRET
developed systems, changing the memory lock
status from off (unlocked) to on (locked) automatically disables all
input and output forcing. Forcing can be restored only by
unlocking the system memory and enabling the force tables again
using W
INTERPRET
.
Note: