Honeywell DCP552 Mark II User Manual

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When outputs are indicated in the basic display status, only one digit in the output

value flashes. Increasing or decreasing the output value using 

↑ and ↓

causes the actual output to change accordingly. Unlike setting registration, there is

no need to press the 

.

Use the 

← and →

to move the flashing digit.

Setup data 

is used to select smooth and preset output changes when going

from AUTO to MANUAL modes.

Changes from MANUAL to AUTO are smooth.

(Note, however, that when the integral time setting for a PID group PID parameter

of 0 may cause abrupt changes.)

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Set values can automatically be written when using auto-tuning (AT) in the RUN,

HOLD, FAST and END modes during AUTO mode operation and PID groups (1

to 9, A1 to A7 or fixed command control) are being used.

In READY AUTO mode, the tuning points of PID parameters 

to 

settings can be used as SP to perform auto-tuning of PID groups A1 to A7 values.

Variable parameter 

(CH1) and 

(CH2) allow the following selections:

0 : AT is not performed.
1 : A general AT operation of a PID group used in a mode other than

READY mode

2 : AT of PID values that do not easily overshoot can be written to a PID

group used in a mode other than READY mode.

3 : A standard AT operation is repeatedly performed on PID groups A1 to

A7 in READY mode.

4 : Repeated AT of PID values that do not easily overshoot can be written

to PID groups A1 to A7 used in READY mode.

• During auto-tuning, program run time stops. Thus the RUN and FAST modes

are changed to the HOLD mode.

• Auto-tuning always calculates the excess time and limit sensitivity of thread for

two limit cycles and calculates PID values using characteristics equations, then

automatically writes the results.

• The setup data 

setting (CH1) and 

setting (CH2) change the upper and

lower output limit used during auto-tuning.

A setting of 1, 3 or 5 causes the lower output limit to be determined by variable

parameter 

and the upper output limit to be determined by 

.

A setting of 2 or 4, lower output limit is off and the upper output limit is on.