More than 10 years before RoboCop:
The Old Man thinks up Delta City.
Not long before RoboCop:
OCP enters into a contract with the Detroit city
government to fund and run the Detroit Metropolitan Police
Events chronicled in RoboCop take place.
Between RoboCop and RoboCop2, Ellen and Jimmy Murphy move back to Detroit.
RoboCop's body is rebuilt (because of the damage in RoboCop) this time in blue.
The plans for Delta City are forgotten and OCP gets ready to rebuild Detroit.
Cocaine falls out of popularity in Detroit and "Nuke" becomes the most addictive drug in history.
The cell that the RoboCop program uses for observation is upgraded after RoboCop's initial success.
Five months before RoboCop2, OCP starts working on the RoboCop 2 project.
Events chronicled in RoboCop2 take place.
Between RoboCop2 and RoboCop3:
RoboCop is rebuilt because of damage in RC2, this time
in the original silver.
Faxx is convicted as sole person responsible for the
RoboCop 2 disaster.
The Old Man dies or ends his career in OCP
New CEO is hired.
Johnson is made vice president.
Dr. Marie Lazarus is hired as the scientist in charge
of the RoboCop program.
The RoboCop program's budget is increased. So much so
that it is given a very large new observation room. A
machine-gun/flamethrower hand replacement is built. A
flight-pack is also constructed by funding is cut before
it can be tested.
Plans to rebuild all of Detroit are forgotten and OCP
again gets ready to build Delta City.
OCP is taken over by the Kanemitsu Corporation.
Events chronicled in RoboCop3 take place.
The series although quite different from the movies, takes place one or two years after RoboCop 1, before Robo 2 and 3.
Takes place 10 years after the first movie. Ellen Murphy is dead and Jimmy Murphy is now working at OCP.
Robo:PD doesn't not ignore any events from the sequels but does not reference them either.