What to do if Omron SYSMAC C20K Controller shows I/O bus error I/O BUS ERR?
If the Omron Controller displays an I/O bus error, it indicates an issue in the bus line between the CPU and Units. You should check the CPU Left/Right selector switch on the Expansion I/O Unit and verify the cable connections between the Units and Racks.
What to do if Omron SYSMAC C20K Controller displays cycle time overrun SCAN TIME OVER?
If your Omron Controller displays a cycle time overrun error (SCAN TIME OVER), it means the watchdog timer has exceeded 100 ms. To resolve this, try to reduce the cycle time if possible.
What to do if Omron SYSMAC C20K Controller has a CPU error?
If your Omron Controller is showing a CPU error, it means the watchdog timer has exceeded its maximum setting (default: 130 ms). Restart the system in PROGRAM mode and check the program. You can either reduce the cycle time or reset the watchdog timer if a longer time is required.
What to do if Omron SYSMAC C20K Controller experiences a power interruption?
If the Omron Controller experiences a power interruption, meaning power has been interrupted for at least 10 ms, check the power supply voltage and power lines. Then, try to power it up again.
General| Model | SYSMAC C20K |
|---|---|
| Type | Programmable Logic Controller (PLC) |
| Program Capacity | 2000 steps |
| Operating Temperature | 0°C to 55°C |
| Humidity | 10% to 90% (non-condensing) |
| Instruction Set | Basic instructions |
| Programming Language | Ladder logic |
| Power Supply | 100-240V AC |
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