Delta AH500 Hardware Operation Manual page 381


CPU Operation at Program Error / Bus Fault
This determines how the CPU module reacts when a minor error occurs. If an error occurs, the state of
the CPU may change. Users can define what action should the CPU takes.
 Stop: the CPU module stops running and sends an error.
 Keep Run: the CPU module keeps running and sends an error.

Remote Reset
This determines if the CPU module can be reset through a remote system.
 Disable: Users can NOT reset the CPU module to its default settings through ISPSoft remotely.
 Enable: Users can reset the CPU module to its default settings through ISPSoft remotely.

Constant Communication Response
If the Enable checkbox is not selected, commands received through the communication ports will not be
processed until the scan cycle is complete. If the Enable checkbox is selected, commands received
through the communication ports will be processed every specific period of time. However, the scan
procedure is interrupted when the system processes commands received through the communication
ports. As a result, the scan time will be prolonged if the Enable checkbox is selected. Make sure that the
operation of the system is not affected when the function is used.

SFC Restart Position
This determines from which step the CPU module starts to execute when the state of CPU module
changes from Stop to Run.
 Restart at the initial step: Start executing from the initial step. Define the initial step in ISPSoft.
 Restart at the last executed step of the previous operation: Start executing where the CPU module
last left at.
 Stop  RUN Initial Value Setting: Not Retain Initial Value Setting
This determines whether the states and values of the non-latched devices are restored to initial values
when the PLC changes from Stop to Run.
 Disable: All the states and values in the non-latched devices stay the same.
 Enable: All the states and values in the non-latched devices are restored to initial values when the
PLC changes from Stop to Run. .
 Stop  RUN Initial Value Setting: Retain Init Value Use
This determines whether the states and values of the latched devices are restored to initial values when
the PLC changes from Stop to Run.
 Disable: All the states and values in the latched devices stay the same.
 Enable: All the states and values in the latched devices are restored to initial values when the PLC
changes from Stop to Run. .

Watchdog Timeout
This parameter sets a timeout during which the program is scanned. The CPU module sends an error if
the program execution exceeds the watchdog time.
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C h a p t e r 8 H a r d w a r e C o n f i g u r a t i o n