Omron CPM2C Operation Manual page 71

Unit Components
CPU Unit Component Descriptions
1,2,3...
48
1. Power Supply Connector
Connect the power supply (24 VDC) to this connector.
2. Input Terminals/Connector
Connects the CPU Unit to external input devices.
3. Output Terminals/Connector
Connects the CPU Unit to external output devices.
4. PC Status Indicators
These indicators show the operating status of the PC, as shown in the fol-
lowing table.
Indicator Status
PWR ON
(green)
OFF
RUN ON
(green)
OFF
COMM Flashing Data is being transferred via the communications port
(yellow)
OFF
ERR/ALARM ON
(red)
Flashing A non-fatal error has occurred. (PC operation contin-
OFF
Note CPU Units with lot numbers of 3180O or earlier (produced 31 August
2000 or earlier) also have a PRO (green) indicator that operates as
follows:
Indicator Status
PRO ON
(green)
OFF
5. Input Indicators
The input indicators are lit when the corresponding input terminal is ON.
The status of an input indicator will reflect the status of the input even when
that input is being used for a high-speed counter.
Note a) When interrupt inputs are used in interrupt input mode, the indica-
tor may not light even when the interrupt condition is met if the in-
put is not ON long enough.
b) Input indicators will reflect the status of the corresponding inputs
even when the PC is stopped, but the corresponding input bits will
not be refreshed.
6. Output Indicators
The output indicators are lit when the corresponding output terminal is ON.
The indicators are lit during I/O refreshing. The status of an output indica-
tor will also reflect the status of the corresponding output when the output
is being used as a pulse output.
Meaning
Power is being supplied to the PC.
Power isn't being supplied to the PC.
The PC is operating in RUN or MONITOR mode.
The PC is in PROGRAM mode or a fatal error has
occurred.
(peripheral or RS-232C).
Data isn't being transferred via communications port.
A fatal error has occurred. (PC operation stops.)
ues.)
Indicates normal operation.
Meaning
The CPU Unit is set for Programming Console con-
nection.
The CPU Unit is not set for Programming Console
connection.
Section 2-2