OPERATION MANUAL

Power OFF Operation Section 10-3
Operating Mode Changes and I/O Memory
Mode Changes Non-holding areas Holding Areas
I/O bits
HR Area
Data Link bits
DM Area
CPU Bus Unit bits
EM Area
Special I/O Unit bits
Counter PV and Completion Flags
Inner Board bits
SYSMAC BUS bits
I/O Terminal bits
C200H Special I/O Unit bits
DeviceNet bits
Work bits
Timer PV/Completion Flags
Index Registers
Data Registers
Task Flags
(Auxiliary Area bits/words are holding
or non-holding depending on the
address.)
(Auxiliary Area bits/words are holding
or non-holding depending on the
address.)
RUN or MONITOR to PROGRAM Cleared (See note 1.) Held
PROGRAM to RUN or MONITOR Cleared (See note 1.) Held
RUN to MONITOR or
MONITOR to RUN
Held (See note 2.) Held
486
Note 1. The following processing is performed depending on the status of the I/O
Memory Hold Bit. Output from Output Units will be turned OFF when operation
stops even if I/O bit status is held in the CPU Unit.
2. The cycle time will increase by approximately 10 ms when the operating
mode is changed from MONITOR to RUN mode. This will not, however,
cause an error for exceeding the maximum cycle time limit.
I/O Memory
I/O Memory Output bits allocated to Output Units
Hold Bit status
(A50012)
Mode changed
between
PROGRAM
and RUN/
MONITOR
Operation stopped
Fatal error FALS
other than executed
FALS
Mode changed
between
PROGRAM
and RUN/
MONITOR
Operation stopped
Fatal error FALS
other than executed
FALS
OFF Cleared Cleared Held OFF OFF OFF
ON Held Held Held Held OFF OFF
10-3 Power OFF Operation
10-3-1 Overview
Note Refer to 9-2 I/O Memory Areas for more details on I/O Memory.
The following processing is performed if CPU Unit power is turned OFF.
Power OFF processing will be performed if the power supply falls below 85%
of the rated voltage while the CPU Unit is in RUN or MONITOR mode.
1,2,3... 1. The CPU Unit will stop.
2. Outputs from all Output Units will be turned OFF.