PLC can be specified on the program to perform a limited number of scans (scanning from 1 to 65,535 scans), the number by assigning a PLC scan that is running, you can monitor process variables change. During the first scan, the SM0.1 value will be 1.
1. perform a scan
“A single scan“ the PLC from the STOP into a RUN, perform a single scan, and then back to the STOP, so the related status information is not lost for the first time. Steps are as follows:
(1) PLC must be in STOP (stop) mode. If you do not STOP (stop) mode turn PLC into stop mode.
(2) a menu of “debugging“ → “first scan“.
2. perform multiple scans
Steps are as follows:
(1) PLC shall be situated in STOP (stop) mode. If you STOP (stop) mode turn PLC into stop mode.
(2) the menu “debug“ → “multiple“ → appeared “scan“ dialog box
(3) enter the desired scan number values, click “OK“.
PLC ONE 