!
58
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 ef
fective 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
CPU Rack CV500 or
CVM1-CPU01-EV2
9.8 A max. 5.8 A max.
CV1000, CV2000,
CVM1-CPU11-EV2,
or
CVM1-CPU21-EV2
9.4 A max. 5.4 A max.
Expansion CPU Rack 11 A max. 7 A max.
Expansion I/O Rack 11 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.
Power Supply Units Section 3-4
To Next Page
Loading...
Need help?
General
