Cpu Components; Indicators - Omron SYSMAC CV Series Operation Manual

CPU Components

2-1

CPU Components

EM Card compartment
(CV1000, CV2000, or
CVM1-CPU21-EV2 only;
optional)
Memory Card (optional), DIP switch,
and battery compartment
Do not pull out the Memory Card while
the Memory Card indicator is lit. The
Memory Card power switch must be
ON for the Memory Card to operate.

2-1-1 Indicators

Indicator
POWER (green) Lights when power is supplied to the CPU.
RUN (green) Lights when the CPU is operating normally.
ERROR (red) Lights when an error is discovered in diagnostic operations. When this indicator lights, the RUN
indicator will go off, CPU operation will be stopped, and all outputs from the PC will be turned OFF.
WDT (red) Lights when a CPU error (watchdog timer error) has been detected. When this indicator lights, the
RUN indicator will go off, CPU operation will be stopped, and all outputs from the PC will be turned
OFF.
ALARM (red) Lights when an error is discovered in diagnostic operations. PC operation will continue.
OUT INH (orange) Lights when the Output OFF Bit, A00015, is turned ON. All PC outputs will be turned OFF.
COMM (orange) Lights when the host link interface is transmitting or receiving data.
M/C ON (orange) Lights when power is supplied to the Memory Card. Press the Memory Card power switch once to
turn the power OFF or ON. Do not remove the Memory Card while the power is ON. It may flicker
when the simplified backup function operates. Refer to 1-13-4 Upgraded Specifications for details.
22
The following diagram shows the basic components of the CPU that are used in
general operation of the PC.
Indicators
CPU indicators provide visual information on the general operation of the PC.
Although not substitutes for proper error programming using the flags and other
error indicators provided in the data areas of memory, these indicators provide
ready confirmation of proper operation. CPU indicators are shown below and
are described in the following table. Indicators are the same for all CV-series
PCs.
Protect keyswitch
Used to write-protect the Pro-
gram Memory (i.e., the Ex-
tended PC Setup and the user
program).
Peripheral device connector
Host interface
RS-422/RS-232C selector
Memory Card indicator
Lit when power is supplied to
the Memory Card.
Function
Section 2-1