ORB (OR Block), or block directives for branches connected in parallel.
ORB for use:
(1) when several parallel series branch, the branch starting with LD, LDI start, slip the end with ORB directives.
(2) If you need multiple branches in parallel, in each of the branches after the ORB directives. ORB can be used repeatedly. But should be limited to 8 when connecting using the following.
PLC ONE 