Sako SKI600 - Page 124

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F8.15
Threshold value of sleep
0.00 ～ 200.0% 100.0%
This threshold value is the percentage of set
pressure value. This parameter is only valid to
the 󽗉rst sleep mode.
F8.14
Deviation limit of feedback when
entering sleep state compared with
set pressure
0.0 ～ 10.0% 0.5%
This function parameter is only valid to the
second sleep mode.
F8.13
Stop method of sleep mode
0～1 0
0: decelerate to stop
1: coast to stop
F8.12
Sleep mode
0～2 1
0: invalid
1: dormant when feedback pressure exceed or
lower than threshold value
This is the first one of PID sleep mode, as
showed in Fig. F8-5.
2: dormant when feedback pressure and
output frequency is stable.
This is the second one of PID sleep mode,
and it di󽗈ers in the following two conditions
(as showed in 󽗉gure F8-6):
Fig. F8-4 Closed Loop Preset Frequency
0VUQVU
'SFR
1SFTFU
'SFR
5JNF
)PME5JNF
4.2 Detailed Function Description
F8.10
Closed loop preset freq.
0.00 ～ upper limit freq. 0.00
F8.11
Preset freq. hold time
0.0 ～ 3600.0s 0.0
This function code de󽗉nes the driver running
frequency and time before PID control
operates. In some control system, for a fast
arrival of controlled object at preset value,
these function codes can be set to force the
driver to output specific value of F8.10 and
F8.11, which means operate the PID controller
to increase response speed when controlled
object is approaching the controlled target. As
showed in the following 󽗉gure.
1) if feedback value is smaller than reference
and larger than reference * (1-set deviation
【F8.14】), and output frequency change
rate is within 6%, the sleep mode is entered
after delay time【F8.17】.
2) if feedback value increases to above
reference value, the sleep mode is entered
after delay time【F8.17】; otherwise, if the
feedback value decreases to under wake-
up threshold【F8.16】, it will wake up
immediately.
F8.16
Threshold value of wake-up
0.00 ～ 200.0% 90.0%
F8.15 defines the feedback value when the
driver is entering sleep mode. If the actual
feedback is larger than this set value, and
the output frequency arrives at lower limit,
the driver will enter sleep mode (zero speed