Operating Mode At Startup; Plc Operation At Startup - Omron SYSMAC CPM2B Operation Manual

Structure and Operation
1-3-3

Operating Mode at Startup

Note
1-3-4

PLC Operation at Startup

Time Required for
Initialization
Power OFF Operation
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The operating mode of the CPM2B when the power is turned ON depends
upon the PLC Setup settings and the Programming Console's mode switch
setting if a Programming Console is connected.
PLC Setup setting
Word Bits
DM 6600 08 to 15 00
00 to 07 00
Note The startup mode depends upon the setting of Communications Switch
SW201 and the Programming Device connected to the peripheral port.
Programming
Device
None PROGRAM mode
Programming Operating mode set on the Program-
Console ming Console's mode switch
Other device PROGRAM mode (see note 1)
1. The CPM2B will not be able to communicate with the Programming Device
in these cases.
2. The default setting of bits 08 to 15 of DM 6600 is 00. With this default set-
ting, the PLC will automatically enter RUN mode if a Programming Console
is not connected and SW201 is ON. Be sure that it is safe for the PLC to
operate before turning it ON under these conditions.
The time required for startup initialization depends on several factors, such as
the operating conditions (including power supply voltage, system configura-
tion, and ambient temperature) and the program contents.
Minimum Power Supply Voltage
The PLC will stop and all outputs will be turned OFF if the power supply volt-
age falls below 85% of the rated value.
Momentary Power Interruption
A power interruption will not be detected and CPU Board operation will con-
tinue if the power interruption lasts less than 2 ms for a DC power supply.
A power interruption may or may not be detected for power interruptions
somewhat longer than 2 ms for a DC power supply.
When a power interruption is detected, the CPU Board 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.
Setting
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.
PROGRAM mode
01 MONITOR mode
02 RUN mode
SW201 OFF
Section 1-3
Operating mode
SW201 ON
RUN mode (see note 2)
PROGRAM mode
(see note 1)
PROGRAM mode
17