Omron CPM2C, Operation Manual

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1-3 Section
1-3-3 Operating Mode at Startup
The operating mode of the CPM2C when the power is turned ON depends upon
the PC Setup settings and the Programming Console’s mode switch setting if a
Programming Console is connected.
PC Setup setting
Operating mode
Word Bits Setting
p g
DM 6600 08 to 15 00 See note.
01 Startup mode is the same as the operating mode
before power was interrupted.
02 Startup mode is determined by bits 00 to 07.
00 to 07
00 PROGRAM mode
01 MONITOR mode
02 RUN mode
Note The startup mode depends upon the setting of Communications Switch 2 and
the Programming Device connected to the peripheral port.
Programming Device Switch 2 OFF Switch 2 ON
None PROGRAM mode RUN mode (see
note 2)
Programming Console Operating mode set on the
Programming Console’s
mode switch PROGRAM mode
(see note 1)
Other device PROGRAM mode
(see note 1) PROGRAM mode
Note 1. The CPM2C will not be able to communicate with the Programming Device
in these cases.
2. When the power is turned ON, the CPM2C will start in the RUN mode only
when the RS-232C cable is connected to the communications port with
switch 2 set to ON.
1-3-4 PC Operation at Startup
The time required for startup initialization depends on several factors, such as
the operating conditions (including power supply voltage, system configuration,
and ambient temperature) and the program contents.
Power OFF Operation
Minimum Power Supply Voltage
The PC will stop and all outputs will be turned OFF if the power supply voltage
falls below 85% of the rated value.
Momentary Power Interruption
A power interruption will not be detected and CPU Unit operation will continue if
the power interruption lasts less than 2 ms.
A power interruption may or may not be detected for power interruptions some-
what longer than 2 ms.
When a power interruption is detected, the CPU Unit will stop operating and all
outputs will be turned OFF.
Automatic Reset
Operation will restart automatically when the power supply voltage is restored to
more than 85% of the rated voltage.
Timing Chart of Power OFF Operation
The power interruption detection time is the time required for a power interrup-
tion to be detected after the power supply voltage drops below 85% of the rated
value.
1, 2, 3... 1. Minimum power interruption detection time
Power interruptions that are shorter than 2 ms will not be detected.
Time Required for
Initialization