Harrington Hoists and Cranes MR Trolley - (MR2) - Manual (Page 31)

Table 3-8 Dual Speed Trolley (w/VFD) Speed/Frequency Change Procedure

 Each dual speed trolley has a range of available speeds/frequencies (upper and lower limits). Any value
outside the range listed in Table 3-7 for your specific trolley is strictly prohibited.
 Speeds must be set such as Low [d1-01] and High [d1-02].
 After parameters are changed, a “no load” operational check must be performed.
Operational Step VFD Display
1. Energize the trolley.
2. Press until the “Setup Mode” screen is displayed (blinking).
3. Press to display the parameter setting screen (blinking).
4. Press or until the desired parameter is displayed (blinking).
(Low Speed: d1-01, High Speed: d1-02)
5. When you press , the current setting value is displayed (digit selected blinks).
(Example Value: 9Hz)
6. Press to move the blinking digit to the desired digit. (Example Value: 9 blinks)
7. Press or until the desired setting is displayed and press .
(Example Value: 8Hz)
8. Press to confirm the new setting.
9. The display will automatically return to the parameter screen (blinking). (As in Step 4.)
10. Press until the diplay returns to the initial screen. (As in Step 1.)
3.5.11 All dual speed trolleys have a acceleration/deceleration time parameter range that can be customized
to a specific application. Refer to Table 3-9 for specific trolley acceleration/deceleration time ranges.
To set custom acceleration/deceleration times for an application, follow the procedure in Table 3-10.
Table 3-9 VFD Acceleration/Deceleration Time Parameter Ranges
Item Parameter No.
Initial
Value
Unit
Setting
Range
Remark
Acceleration Time
C1-01
4.0 Seconds 1.2 – 6.0
Set the same value to the two
parameters
C1-03
Deceleration Time
C1-02
4.0 Seconds 1.2 – 6.0
Set the same value to the two
parameters
C1-04
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