ISPSoft User Manual
ISPSoft User Manual ISPSoft User Manual
ISPSoft User Manual Users can identify a device by means of the name of the device. When several devices are connected on a network, users can check whether a device connected to the computer is the device they expect by means of the name of the device. To prevent unexpected effect on other CPU modules, if users want to download/upload the program, but the name of the CPU module is different from the name attached to the model in the project management area, the system will remind the users to check the name of the CPU module and the name attached to the model in the project management area. *. The parameters set in HWCONFIG must be downloaded to the CPU module so that they can take effect. (Please refer to section 3.3.6 or section 3.5.4 for more information.) 3.3.2.2 CPU: System After users click the CPU tab at the top of the window, and the System tab at the bottom of the window, they can set the parameters in the CPU module. • Clear Non-latched Device (STOPRUN) If the Enable checkbox is selected, the states of the non-latched devices, and the values in the non-latched devices are cleared when the CPU module begins to run. • Y state (STOPRUN) When the CPU module begins to run, the states of the Y devices are OFF, retained, or restored to the states before the CPU module’s stopping running. ‣ Clear: All Y devices are set to OFF. ‣ Retain Present State: The states of the Y devices are retained. ‣ Previous State before STOP: The states of the Y devices are restored to the states before the CPU module’s stopping running. 3-35
Chapter 3 Configuring and Setting a PLC System • Reset Button & Clear Button Whether the RST button and CLR button on the CPU module is enabled or disabled depends on the setting of these parameters. Please refer to an operation manual for more information about the functions of the buttons. • Watchdog Timeout Users can set a timeout during which the program is scanned. Generally speaking, the watchdog timeout is reset whenever the scan of the program is complete. If the scan procedure can not be completed within the time set for some reason, the watchdog timeout occurs, and the CPU module will be in an erroneous condition. Please refer to operation manuals for more information about troubleshooting. • Enable Constant Scan Users can select the Enable Constant Scan checkbox, and set a scan time. If the actual scan time is less than 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. Besides, if the scan time set is larger than the watchdog timeout set, a watchdog timeout occurs when the CPU module operates. • Interval Interrupt Time An AH500 series CPU module provides four interrupts. Users can set intervals of triggering the interrupts. In ISPSoft, a timed interrupt is created through a task and a POU. Please refer to chapter 5 for more information. 3-36
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Chapter 3 Configuring and Setting a PLC System<br />
• Reset Button & Clear Button<br />
Whether the RST button and CLR button on the CPU module is enabled or disabled depends on<br />
the setting of these parameters. Please refer to an operation manual for more information about<br />
the functions of the buttons.<br />
• Watchdog Timeout<br />
<strong>User</strong>s can set a timeout during which the program is scanned. Generally speaking, the watchdog<br />
timeout is reset whenever the scan of the program is complete. If the scan procedure can not be<br />
completed within the time set for some reason, the watchdog timeout occurs, and the CPU<br />
module will be in an erroneous condition. Please refer to operation manuals for more information<br />
about troubleshooting.<br />
• Enable Constant Scan<br />
<strong>User</strong>s can select the Enable Constant Scan checkbox, and set a scan time. If the actual scan<br />
time is less than setting value, the CPU module will not carry out the next scan until the setting<br />
value is reached. If the actual scan time is larger than the setting value, the CPU module will<br />
ignore the setting value, and operate according to the actual scan time. Besides, if the scan time<br />
set is larger than the watchdog timeout set, a watchdog timeout occurs when the CPU module<br />
operates.<br />
• Interval Interrupt Time<br />
An AH500 series CPU module provides four interrupts. <strong>User</strong>s can set intervals of triggering the<br />
interrupts. In <strong>ISPSoft</strong>, a timed interrupt is created through a task and a POU. Please refer to<br />
chapter 5 for more information.<br />
3-36
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