Omron SYSMAC CP Series, Руководство пользователя

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A-105
Appendices
CP2E CPU Unit Software User’s Manual(W614)
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Description of Operation
The power interruption will be detected if the 100 to 240 VAC power supply falls below 8 5% of the
minimum rated voltage for the power OFF detection time (10 ms minimum for AC power supply and
2ms minimum for DC power supply, not fixed).
The CPU reset signal will turn ON and the CPU Unit will be reset immediately.
The power OFF detection time of CP2E CPU Units is 10 ms minimum for AC power supply and 2ms
minimum for DC power supply. If the power interruption is detected when operating in RUN or MONI-
TOR mode, the instruction currently being executed will be stopped and then the CPU Unit will be reset.
If only a couple of Expansion I/O Units or Expansion Units are connected to the CPU Unit resulting in a
light power supply circuit load and a small current consumption, the time required by the CPU Unit to
detect a power interruption will be longer. For this reason, inputs may be incorrectly identified as being
OFF if external power supply used for an input turns OFF before the power interruption is detected. If
an external NC contact input is used or the ladder program counts the number of ON to OFF transitions,
a malfunction may occur if the external power supply turns OFF.
Power OFF Timing Chart
Power OFF Detection Time: The time from when the power supply voltage drops to 8 5% or less the rated voltage until the
power interruption is detected.
Power Holding Time: The maximum amount of time (fixed at 1 ms) that 5 V will be held internally after power shuts
OFF.
Instruction Execution for Power Interruptions
Malfunction Countermeasures
AC: 10ms
DC: 2ms
Po w er s u pply
v oltage: 85%
Operation al w ays stopped at this point
Holding time for 5 V internal
po
w er s u pply after po w er OFF
detection: 1 ms
Po w er OFF detection
Po w er OFF Detection Time
Po w er OFF
detected signal
Program exec u tion
stat u s
CPU Unit reset signal
Cyclic task or interr u pt task Stop