Allen-Bradley 2080-LC20-20QBB User Manual page 184

Appendix C Quickstarts
174
3. Double-click the newly added Instruction Block and select
"Timer On/Off "(TONOFF).
Configure the Instruction Block to trigger every one second.
4. From the Toolbox, double-click Reverse Contact to add it to the rung, or
drag and drop Reverse Contact onto the run. Place it to left of the recently
added Instruction Block.
Rockwell Automation Publication 2080-UM005E-EN-E - March 2018