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1-3
Section
2. Undetermined additional time
Power interruptions only slightly longer than the minimum power interrup-
tion time may not be detected.
85% of rated voltage
Program execution
CPU reset signal
Detection of
power interruption
Executing
Stopped
1. Minimum time
2. Additional
time
CPU Unit operation will
continue if voltage is
restored in this region.
CPU Unit operation may
continue if voltage is
restored in this region.
Note If the power supply voltage fluctuates around 85% of the PC’s rated voltage, PC
operation may stop and restart repeatedly. When repeated stopping and starting
will cause problems with the controlled system, set up a protective circuit such
as a circuit that shuts OFF the power supply to sensitive equipment until the
power supply voltage returns to the rated value.
Summary of Contents for CPM2C
Page 1: ...CPM2C Programmable Controllers Operation Manual Produced June 1999...
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