Chapter 14 Sequential Function Chart Take Action member counter for example, if users want to monitor Action property active number change from 0 to 1and transmit the parameter value to D100 register, the programs are written in the following ways. Use SM400 (The flag is always ON when CPU runs) and DMOV command in ladder program, click the S contact of DMOV command and choose the POU name for SFC program from the drop-down list and click the name. After clicking the POU name for SFC program, right-click the mouse and a drop-down list with POU Action name appears, then select the name. 14-27