Integration of AC500 PLC into System 800xA

The AC500 PLC hardware can be used for certain

process control functions while the operator

benefits from user experience in System 800xA.

Proven libraries are provided for System 800xA

and AC500. This allows programming control

tasks in the AC500 PLC while System 800xA is the

operator interface. For large distributed projects,

many AC500 PLCs can be connected to a System

800xA node.

Process Control objects

Twelve objects are available which cover the

following functionalities:

• Digital and analog setpoints

• Analog measurement with threshold alarm

functions

• Valve control

• Motor control with or without variable speed

drives

• Proportional integral controller

Communication between System 800xA and AC500 PLC

Communication between the AC500 function

blocks and the objects in System 800xA uses the

PLC Connect option of System 800xA and the

AC500 OPC Server.