The Yokogawa UP55A Profile Controller employs an easy-to read, 14-segment large color LCD display, along with navigation keys, thus greatly increasing the monitoring and operating capabilities. A ladder sequence function is included as standard. The short depth of the controller helps save instrument panel space. The UP55A also support open networks such as Ethernet communication.

The program setting function increases or decreases the value of a target setpoint (SP) according to a given program pattern that varies with time. The controller stores two or more program patterns and the operator can switch between them according to the operating status. Each program pattern consists of multiple line segments (program segments). The operator sets the time interval of each program segment using the segment time or slope. The operator can also set such instructions as the number of repeats, start/stop, and status output (event output) for a given program pattern.