Chapter 3 PLC System Configuration & Settings Constant Communication Response Enable If this function is not enabled, commands received through the communication ports will not be processed until the scan cycle is complete. If this function is enabled, 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 this function is enabled. Please make sure that the operation of the system is not affected when this function is used.
Watchdog Timeout Users can set a timeout during which the program is scanned. If the scan procedure cannot be completed within the time set for some reason, the watchdog timeout occurs, and the CPU module will be in an erroneous condition. Constant Scan Enable Users can select the Constant Scan Enable checkbox, and set a scan time. If the actual scan time is less than the setting value, the CPU module will not carry out the next scan until the setting value is reached. If the actual scan time is larger than the setting value, the CPU module will ignore the setting value, and operate according to the actual scan time.
Scan Time Users type the period of scan time in the box if the preceding constant scan is enabled. User should notice that the timeout error will occur once the CPU starts to run if the set scan time is larger than Watchdog Timeout value. Interval Interrupt Time 0 Users can set interval timers to trigger the interrupts. The function is used with Timer Interrupt 0 in the work management together. Please refer to chapter 5 for more information. Interval Interrupt Time 1 Users can set interval timers to trigger the interrupts. The function is used with Timer Interrupt 1 in the work management together. Please refer to chapter 5 for more information.
Interval Interrupt Time 2 Users can set interval timers to trigger the interrupts. The function is used with Timer Interrupt 2 in the work management together. Please refer to chapter 5 for more information. 3-199