Frequency Reduction Gain - YASKAWA CR700 Technical Manual

Related Monitors
■
No.
U4-53 Num of Driv 1 (Low)
U4-54 Num of Driv 1 (High)
U4-55 Num of Driv 2 (Low)
U4-56 Num of Driv 2 (High)
U4-57 Num of Driv 3 (Low)
U4-58 Num of Driv 3 (High)

Frequency Reduction Gain

◆
This function switches to low-speed operation when the crane load is near the target position.
The frequency is adjusted by multiplying the gain against the smallest frequency reference from among d1-01
[Reference 1] through d1-17 [Jog Reference] as selected by the multi-step speed reference. When the external
input terminal to which frequency reduction gain is assigned turns on, the gain set to S2-16 or S2-17 is applied to
the normal frequency reference followed by a corresponding switch to low-speed operation.
Note:
This function is disabled when the frequency reference is held through the use of H1-xx = A [Accel/Decel Ramp Hold] or H1-xx = 10 or
11 [Up/Down Command].
Related Parameters
■
No. Name
S2-16 Micro Speed Gain1
S2-17 Micro Speed Gain2
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Name
Displays the lower 4 digits of the cumulative motor 1 startup count.
Note:
The drive run count appears as an 8-digit number. U4-54 displays the upper 4 digits, and U4-
53 displays the lower 4 digits.
The maximum count value is 10,000,000. The counter stops once the maximum value is reached.
The count value can be changed with S2-09.
Displays the upper 4 digits of the cumulative motor 1 startup count.
Note:
The drive run count appears as an 8-digit number. U4-54 displays the upper 4 digits, and U4-
53 displays the lower 4 digits.
The maximum count value is 10,000,000. The counter stops once the maximum value is reached.
The count value can be changed with S2-09.
Displays the lower 4 digits of the cumulative motor 2 startup count.
Note:
The drive run count appears as an 8-digit number. U4-56 displays the upper 4 digits, and U4-
55 displays the lower 4 digits.
The maximum count value is 10,000,000. The counter stops once the maximum value is reached.
The count value can be changed with S2-10.
Displays the upper 4 digits of the cumulative motor 2 startup count.
Note:
The drive run count appears as an 8-digit number. U4-56 displays the upper 4 digits, and U4-
55 displays the lower 4 digits.
The maximum count value is 10,000,000. The counter stops once the maximum value is reached.
The count value can be changed with S2-10.
Displays the lower 4 digits of the cumulative motor 3 startup count.
Note:
The drive run count appears as an 8-digit number. U4-58 displays the upper 4 digits, and U4-
57 displays the lower 4 digits.
The maximum count value is 10,000,000. The counter stops once the maximum value is reached.
The count value can be changed with S2-11.
Displays the upper 4 digits of the cumulative motor 3 startup count.
Note:
The drive run count appears as an 8-digit number. U4-58 displays the upper 4 digits, and U4-
57 displays the lower 4 digits.
The maximum count value is 10,000,000. The counter stops once the maximum value is reached.
The count value can be changed with S2-11.
Sets the gain used to decrease the frequency reference. This parameter is enabled when the
terminal set to H1-xx = 3A [MFDI Function Select = Micro Speed Gain1] turns on.
Sets the gain used to decrease the frequency reference. This parameter is enabled when the
terminal set to H1-xx = 3B [MFDI Function Select = Micro Speed Gain2] turns on.
3.10 Crane Application Setup Procedure
Bit
Description
3
Default
(Range)
1.00
(0.00 - 1.00)
1.00
(0.00 - 1.00)
223