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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.
PROPORTIONAL CYCLE-TIME
Factory set
To use the 20 sec factory set cycle-time no action is needed
whether autotune is used or not.
CYCLE-TIME RECOMMENDATIONS
Output
Factory
Device
Setting
Internal relay
20 seconds
rLY/rLY1
Internal relay
20 seconds
rLY2
Solid state
20 seconds
drives
SSd/SSd1/SSd2
To Select AUTOTUNE CALCULATED CYCLE-TIME
On completion of Autotune enter program mode.
Select
The controller will display CYC.t and 20 (the factory
setting) in seconds
To view the calculated optimum cycle-time press and hold
the
button then press and hold
The controller will display the calculated cycle-time in the
lower display e.g. A 16 . This indicates that the calculated
cycle-time is 16 seconds
Recommended
Load max
Minimum
(resistive)
10 seconds
2A/250 Vac
10 seconds
1A/250 Vac
Externally
0.1 seconds
fitted SSR
(n/a)
CYC.T
CYC.T
until indexing stops.
CYC.T
A16
20
9
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