Speed Search - YASKAWA E7U Programming Manual

Parameter
Parameter Name
No.
Digital Operator Display
Motor Pre-Heat Current
b2-09
Preheat Current
Motor Pre-Heat Current 2
b2-10
Preheat Current2
Speed Search Selection
b3-01
SpdSrch at Start
Speed Search Deactivation
b3-02 Current
SpdSrch Current
Speed Search Deceleration
b3-03 Time
SpdSrch Dec Time
Speed Search Delay Time
b3-05
Search Delay
Bidirectional Speed Search
b3-14 Selection
Bidir Search Sel
Timer Function ON-Delay
b4-01 Time
Delay-ON Timer
Timer Function OFF-Delay
b4-02 Time
Delay-OFF Timer
PI Mode Setting
b5-01
PI Mode
b5-02 Proportional Gain Setting
P Gain
b5-03 Integral Time Setting
PI I Time
b5-04 Integral Limit Setting
PI I Limit
b5-06 PI Output Limit
PI Limit
b5-07 PI Offset Adjustment
PI Offset
Denotes that parameter can be changed when the drive is running. * Menu location is Quick Setting when b5-01=1, and Programming when b5-01=0.
Table A.1 Parameter List (Continued)
Description
Motor Pre-heat current in % of Drive rated current. This is used to
keep the motor warm to prevent condensation and is used in
conjunction with a digital input (data = 60).
Sets the DC preheat current for multi-function output setting 80
(Motor Preheat 2) as a percentage of Motor Rated Current (E2-01).

Speed Search

Enables/disables and selects the speed search function at start.
0: SpdsrchF Disable - Speed search at start is disabled
(estimated speed method is used at other times)
1: SpdsrchF Enable - Speed search is enabled
(estimated speed method)
2: SpdsrchI Disable - Speed search at start is disabled
(current detection method is used at other times)
3: SpdscrhI Enable - Speed search is enabled
(current detection method)
Estimated Speed Method:
Actual motor speed and direction is estimated, then the motor is
ramped from that speed to the commanded speed.
Current Detection Method:
Current level is monitored while output frequency is ramped down.
Used only when b3-01 = 3. Sets the speed search operation current
as a percentage of Drive rated current.
Used only when b3-01 = 3. Sets the deceleration time during speed
search.
Delays the speed search operation after a momentary power loss to
allow time for an external output contactor to re-energize.
0: Disabled
1: Enabled
Delay Timers
Used in conjunction with a multi-function digital input and a multi-
function digital output. This sets the amount of time between when
the digital input is closed, and the digital output is energized.
Used in conjunction with a multi-function digital input and a multi-
function digital output. This sets the amount of time the output
stays energized after the digital input is opened.
PI Control
This parameter enables / disables the closed loop (PI) controller.
0: Disabled
1: Enabled (commanded speed becomes PI setpoint)
3: Fref+PI
Sets the proportional gain of the PI controller.
Sets the integral time for the PI controller. A setting of zero
disables integral control.
Sets the maximum output possible from the integrator. Set as a %
of fmax.
Sets the maximum output possible from the entire PI controller.
Set as a % of fmax.
Sets the amount of offset of the output of the PI controller. Set as a
% of fmax.
The PI Offset Adjustment parameter has two different uses. Param-
eter b5-07 serves different functions depending on whether it is
used on a standard PI loop or a Differential PI loop.
1: Parameter b5-07 causes an offset to be applied to the output of
the PI function in a non-Differential PI loop. Every time the PI
output is updated, the offset is summed with the PI output. This
can be used to artificially kick-start a slow starting PI loop.
2: If the Drive is configured for Differential PI Regulation
(H3-09=16), then the PI Offset is the targeted maintained differ-
ential between the signal measured on analog input A1 and the
signal measured on analog input A2.
Parameters A - 5
Setting Factory Menu
Range Setting Location
0 to100 0% Programming
0 to 10% 5 Programming
0 to 3 2 Programming
0 to 200 120% Programming
0.1 to 10.0 2.0sec Programming
0.0 to
0.2sec Programming
20.0sec
0 or 1 1 Programming
0.0 to
0.0sec Programming
3000.0
0.0 to
0.0sec Programming
3000.0
0, 1, 3 0 Quick Setting
0.00 to
2.00 Quick Setting*
25.00
0.0 to 360.0 5.0sec Quick Setting*
0.0 to
100% Programming
100.0
0.00 to
100.0% Programming
100.0
–100.0 to
0.0% Programming
+100.0