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Basic PLC Parameters

Basic​

Action​

  • Override the instruction error:
    • If checked, the CPU keeps running even if there is an instruction error in a scan program.
  • Asynchronous scan(Timer):
    • If checked, scan time will not match timer.

Prohibit Program Upload​

  • Enable - (Replace with Permission mode):
    • If checked, the project on the PLC is prevented from being uploaded to the computer.
      • Refer to Program Password for more information.
      • This parameter is automatically enabled or disabled.

Communication​

  • Enable PLC-Link auto-swap:
    • If checked, in a redundancy system and the primary CPU fails, the secondary CPU will run automatically.
      • Only for the CM1-XP1R.

Hot Restart​

  • Enable:
    • If checked and if the power is ON in the designated time, the hot start initialization program will run first before the scan program.
    • *The following CPUs do NOT support Hot Restart due to no real-time clock (RTC) support:
      • CM1-CP3A
      • CM1-CP4A

Expansion​

  • Expansion:
    • If checked, this will use the expansion base number.
      • Only CM1-CP3 and CM1-XPxx support expansion base.

Firmware Upgrade Options​

  • Disable CPU auto reset:
    • If checked, the PLC CPU will NOT automatically reset when upgrading the firmware.
  • Prevent CPU built-in IP address recovery:
    • If checked, the PLC CPU will NOT conduct an IP address recovery when upgrading the firmware.
  • Prevent auto reset when upgrade fails:
    • If checked, the PLC CPU will NOT automatically reset if the firmware fails to upgrade.

Timer​

  • 100mSec.:
    • The default range for timer data registers clocking at 100ms.
    • If the range is T0000 ~ T1, all timer data registers become 10ms.
  • 10mSec.:
    • The default range for timer data registers clocking at 10ms.
CPU Timer Data Register Range
CPU SeriesTimer Range
CM1-XPT0000 ~ T4095
CM1-CPT0000 ~ T1023
CM3T0000 ~ T0511

Watch Dog Timer​

  • Enable:
    • If checked, the watch dog timer will be enabled.
      • The range is 10ms ~ 60,000ms.
        • If the watch dog timer is longer than the scan time, the CPU will automatically reset.

CPU Watch Dog Timer​

  • Treated as CPU WDT error:
    • If checked, the CPU watch dog timer will be treated as an error.