PACSystemsâ„¢ RX3i and RSTi-EP CPU Reference Manual Section 3
GFK-2222AK October 2019
CPU Configuration 46
3.2 Configuration Parameters
3.2.1 Settings Parameters
These parameters specify basic operating characteristics of the CPU. For details on how
these parameters affect CPU operation, refer to PACSystems RX3i and RSTi-EP CPU
Programmer’s Reference Manual, GFK-2950 Section 2.
Specifies whether passwords are Enabled or Disabled. Default: Enabled.
Note: If Enhanced Security
56
is enabled in the target properties, the Passwords
setting will be Enabled and read-only, and the Access Control tab appears.
When passwords are disabled, they cannot be re-enabled without clearing PLC
memory.
Specifies whether the I/O is scanned while the PLC is in STOP Mode. Default: Disabled.
(Always Disabled for Redundancy CPU.)
Note: This parameter corresponds to the I/O ScanStop parameter on a Series 90-70
PLC.
(Denominated in ms, set in 10ms increments.) Requires a value that is greater than the
program sweep time.
The software watchdog timer is designed to detect failure to complete sweep
conditions. The CPU restarts the watchdog timer at the beginning of each sweep. The
watchdog timer accumulates time during the sweep. The software watchdog timer is
useful in detecting abnormal operation of the application program, which could
prevent the PLC sweep from completing within the watchdog time period.
Valid range: 10 ms through 2550 ms, in increments of 10 ms.
Default: 200.
For details on setting the watchdog timer in a CPU redundancy system, refer to the
PACSystems Hot Standby CPU Redundancy User Manual, GFK-2308.
Logic/
Configuration
Power-up
Source
Specifies the location/source of the logic and configuration data that is to be used (or
loaded/copied into RAM) after each power up.
Choices: Always RAM, Always Flash, Conditional Flash.
Default: Always RAM.
For availability, refer to the Important Product Information document for the CPU firmware version that you are using.
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