Chapter 6. OPERATION

6 - 1 Power Supply On

When 100 to 240V AC is applied across terminals (39) and (40) on the DCP552, the display goes on in about 10 seconds and controls and other operations start. When the controller is starting up, the LEDs on the profile display go on at irregular intervals one after the other starting from top right in clock-wise order until the controller becomes ready for operation.

The startup flow procedure is shown below.

Startup flow procedure

Power on

 

 

NO

Is RAM backup normal ?

 

 

 

 

 

 

YES

 

 

 

 

 

YES

Is setup data C43 set to 0?

 

 

 

 

 

NO

 

 

 

 

 

YES

 

Was the power outage

 

(seconds) shorter than the

 

 

setup data C43 setting? *

 

 

NO

 

 

 

 

 

 

 

In RUN or FAST mode, the AUTO

READY, RUN, HOLD,FAST, END and

or MANUAL mode is invoked.

READY FAST modes continue operating.

READY, HOLD, END and READY

 

 

FAST modes continue operating.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check start of general reset.

Press the ENTER key.

Parameters are reset to default values. All programs are cleared.

Program run mode READY mode AUTO mode

The program is reset to segment number 1 in program number 1. Segment advancing time = 0

Program operation and fixed command control continue operating. AUTO and MANUAL modes continue operating.

(In MANUAL mode, numeric entries remain intact.) Program and segment numbers remain unchanged. Segment progress time remains unchanged.

In AUTO mode, display numbers in the basic display status remain unchanged.

Auto tuning is interrupted.

A G.SOAK wait is initialized.

A PID computation is initialized.

Event output status is initialized.

Changes between setting display status and basic display status.

Start of operation

*: The measurement of a power outage may vary by about 10 seconds.

6-1

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Honeywell DCP552 Mark II user manual Power Supply On, Startup flow procedure