Expansion I/O Unit Components - Omron CPM1A Operation Manual

Unit Components

2-2-2 Expansion I/O Unit Components

5. Expansion I/O Unit Connecting Cable
7. PC Status Indicators
These indicators show the operating status of the PC, as shown in the fol-
lowing table.
Indicator Status
PWR (green) (g )
ON
OFF
RUN (green) (g ) ON
OFF
ERR/ALARM
ON
(red) ( d)
Flashing A non-fatal error has occurred. (PC operation
OFF
COMM (orange) ( g )
ON
OFF
8. Input Indicators
These indicators are lit when the corresponding input terminal is ON.
When a fatal error occurs, the input indicators change as follows:
Fatal error
CPU Unit error or I/O bus error
Memory error, no END instruction
error, or system error
9. Output Indicators
These indicators are lit when the corresponding output terminal is ON.
10. Analog Controls
Setting these controls sets the contents of IR 250 and IR 251 from 0 to 200.
11. Peripheral Port
Connects the PC to a Peripheral Device, RS-232C Adapter, or RS-422
Adapter.
12. Expansion I/O Unit Connector
Connects the PC's CPU Unit to an Expansion I/O Unit to add another 12
input points and 8 output points. Up to 3 Expansion I/O Units can be con-
nected.
Expansion I/O Unit with 20 I/O Terminals
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.
A fatal error has occurred. (PC operation stops.)
continues.)
Indicates normal operation.
Data is being transferred via the Peripheral Port.
Data isn't being transferred via the Peripheral
Port.
Input indicators
Turn OFF.
The indicators will change with the
status of the input signal, but input
status will not be updated in memory.
1. Input terminals
3. Input indicators
6. Expansion connector
4. Output indicators
2. Output terminals
Section 2-2
33