Chapter 5. FUNCTIONS

Mode transition operations

Mode transitions are performed using the following operations.

Although “Operation end” is not an operation, it is described here as a factor in mode transitions.

RUN

Switches from the READY, HOLD, FAST and READY FAST modes to the RUN mode. To go from the READY mode or READY FAST to the RUN mode using keys, external switches or transmission, the DCP552 must be in basic display status.

HOLD

Switches from the RUN and FAST modes to the HOLD mode. During constant value control the HOLD mode cannot be invoked.

RESET

Switches from the RUN, HOLD, FAST, END and READY FAST modes to the

READY mode.

In program operation, the reset involves returning the program to the first segment.

ADV

Brings the program forward by one segment in the READY, RUN, HOLD, FAST and READY FAST modes. ADV (advance) operation is not available in the constant value control mode.

FAST

The FAST mode is invoked from the RUN, HOLD, READY and READY FAST modes. During constant value control the FAST mode cannot be invoked.

AUTO

Switches from the MANUAL mode to AUTO mode.

MANUAL

Switches from the AUTO mode to MANUAL mode.

The basic display status shows PV and the output value (%) during this transition. Switching from AUTO to MANUAL using external switches or transmission invokes the basic display status even when the parameter setting status or programmer setting status are in use.

Operation end

Operation ends when all progress of program settings including cycle and pattern links reach the end in the RUN, FAST and READY FAST program operation modes or during an ADV operation. By making a setup selection, it is possible to set READY or END as the state of the controller when the program reaches its end.

Note, however, that when an operation ends in the READY FAST mode, it always ends in the READY mode. In constant value control mode, operation end is not available.

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Honeywell DCP552 Mark II user manual Mode transition operations, Operation end