Power Supply Units
Section 3-4
The PC ignores all momentary power interruptions if the interruption lasts no
longer than 10 ms. If the interruption lasts between 10 and 25 ms, the interrup
-
tion may or may not be detected. If the supply voltage drops below 85% of the
rated voltage for longer than 25 ms (less for the DC Power Supply Unit), a power
interruption detection signal is output and program execution is halted.
If power is not restored within 10 ms (the power retention time) after the power
interruption detection signal is output, the PC stops operating and all outputs are
turned OFF.
If after power interruption detection, power is restored within a period defined as
the momentary power interruption time (default value: 0 ms), the CPU will re-
sume operation. If the momentary power interruption time elapses and power
has not been restored, the CPU will begin execution of the power OFF interrupt
program if one has been programmed. The CPU stops operating after the lapse
of the power retention time (10 ms).
Note The momentary power interruption time can be set to between 0 and 10 ms. For
details, refer to the CVSS Operation Manuals.
Caution If a C500 Expansion I/O Rack is connected to the PC, the momentary power in
-
!
terruption time setting is not effective and a power interruption of any length will
trigger shut down processing.
Automatic Recovery
Operation is resumed automatically when the voltage is restored to more than
85% of the rated value.
3-4-6 Current Consumption
The Power Supply Units are limited in the total current they can supply to Units
on the Racks. The following table shows the maximum current available on a
Rack for either model of Power Supply Unit. The available current shown in the
table is in addition to the current consumed by the Backplane, Power Supply
Unit, CPU, I/O Control Unit, I/O Interface Unit, and Peripheral Devices.
Rack
CV500-PS221/211
CVM1-PA208
5.8 A max.
CPU Rack
CV500 or
9.8 A max.
CVM1-CPU01-EV2
CV1000, CV2000,
CVM1-CPU11-EV2,
or
9.4 A max.
5.4 A max.
CVM1-CPU21-EV2
Expansion CPU Rack
Expansion I/O Rack
11 A max.
11 A max.
7 A max.
7 A max.
Calculate the current requirements for the Units on each Rack by adding up the
current consumption of each Unit mounted, excluding the Power Supply Unit,
CPU, I/O Control Unit, I/O Interface Unit, Remote I/O Slave Units, and Peripher
-
al Devices (the power requirements for these Units have already been allowed
for). The total must not exceed the limit given above for the Rack.
The current consumption for the Expansion I/O Rack does not include the cur
-
rent consumed by peripheral devices. The current consumed by peripheral
devices attached to the Expansion I/O Rack must be included when calculating
the total current consumption.
58
OMRON [ OMRON ELECTRONICS LLC ]
