Chapter 3 PLC System Configuration & Settings IO Update with Task The I/O includes DVPxxMC I/O points, left and right expansion modules and CANopen data. Select FF and IO data is updated in the system; select other assigned Task and the IO data will be updated before executing the assigned Task. 3.6.2.10 Options - Run/Stop Setting The page below is set to refresh IO and initial value of parameters.
Stop -> Run Initial Value Users can select Clear value or Keep value (1) When Clear Value is selected and the device operates from Stop to Run, non-retentive variables and devices will return to initial value or default value, while the retentive variables (VAR_RETAIN type) and devices will not return to initial value. When the non-retentive variables are bound to retentive devices, the variable will return to initial value if operates from Stop to Run or powering up; If the initial value is not set, the variable will be set as the value stored in the retentive device operates from Stop to Run or powering up.
(2) When Keep Value is selected and the device operates from Stop to Run, the variables and devices will keep the value before Stop. When the software starts download again and operates from Stop to Run, the, non-retentive variables and devices will return to initial value or default value; while the retentive variables (VAR_RETAIN type) and devices will not return to initial value. 3-229