Omega-engineering CN9400 User Manual download pdf (Page 13)

Proportional cycle-time

The choice of cycle-time is influenced by the external switching

device or load. eg. contactor, SSR, valve. A setting that is too long

for the process will cause oscillation and a setting that is too short

will cause unnecessary wear to an electro-mechanical switching

device.

CYCLE-TIME SELECTION METHODS

The following methods of cycle-time selection may be used:

Autotune calculated

After Autotune has been run and completed the calculated

cycle-time can be manually accepted or adjusted to suit the

switching device. For selection method see Select Autotune

Calculated Cycle-time.

Pre-select Autotune cycle-time

The controller can be programmed to automatically accept

any calculated Autotune cycle-time. For selection method

see Pre-Select Automatic Acceptance of Any Autotune

Cycle-time, page 10.

Pre-select before Autotune

The controller can be programmed manually with any

cycle-time between 0.1 and 81 sec. This cycle-time will not be

changed by any Autotune functions. For selection method see Pre-

Select Cycle-time Before Autotune, page 10.

Factory set

To use the 20 sec factory set cycle-time no action is needed

whether autotune is used or not.

CYCLE-TIME RECOMMENDATIONS

To Select AUTOTUNE CALCULATED CYCLE-TIME

On completion of Autotune enter program mode.

Select

The controller will display

CYC.t

and

(the factory

setting) in seconds

To view the calculated optimum cycle-time press and hold

the ✱ button then press and hold ▼ until indexing stops.

The controller will display the calculated cycle-time in the

lower display e.g.

A16

. This indicates that the calculated

cycle-time is 16 seconds

PROPORTIONAL CYCLE-TIME

Output

Device

Load max

(resistive)

Factory

Setting

Recommended

Minimum

Internal relay

rLY/rLY1

Internal relay

rLY2

20 seconds

10 seconds

2A/250 Vac

1A/250 Vac

Externally

fitted SSR

(n/a)

Solid state

drives

SSd/SSd1/SSd2

10 seconds

0.1 seconds

CYC.T

A16

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 37 38

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Omega-engineering CN9400 User Manual Page 13

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