C500CN812N Omron, C500CN812N Datasheet - Page 43

• Manufacturer Part Number: C500CN812N
• Description: I/O CONNECTION CABLE
• Manufacturer: Omron

Specifications of C500CN812N

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

C2000H Duplex System
When an Error Occurs in
the Duplex System
30
When the Duplex System is put into operation, both CPUs are in the ON position
and an active CPU, either the right CPU or the left CPU, is selected. A Duplex
System is a control system with two operable CPUs, an active CPU and a stand-
by CPU, either of which can take over system operation at any time. However, if
an error occurs causing one of the CPUs to fail, the system automatically
changes to a Simplex System, regardless of the switch settings on the front pan-
el of the Duplex Unit. For example, if an error occurs in the standby CPU causing
2. Set the System Switch, located on the front panel of the Duplex Unit, to DPL
3. Next, select the active CPU by setting the Active Switch to RIGHT or LEFT.
4. To complete the initial settings, set both CPU ON/OFF selectors on the front
Note All information previously stored in the RAM Pack of the standby CPU
(Duplex System) or SPL (Simplex System). As shown below, the switch is
set to DPL to indicate a Duplex System.
In the example above, the right CPU is the active CPU.
panel of the Duplex Unit to the ON position. If both CPU selectors are not in
the ON position, the Duplex System cannot operate.
will be erased when a new program is written to the RAM Pack of the
active CPU.
CPU ON/OFF switches
Use these switches to supply power to
each of the CPUs. To operate the CPU,
move the corresponding switch to the
ON position. When replacing the CPU,
move the corresponding switch to the
OFF position, and remove the CPU
from the Rack. Note that power is not
supplied to the CPU whose corre-
sponding switch is OFF.
ACTIVE SYSTEM
DPL (Duplex)
SPL (Simplex)
INITIAL SET
Section 3-2