Fuji Electric FRENIC MEGA G2 Series - 4 ] Hoist Function

5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
5-343
FUNCTION CODES
Chap 5
FUNCTION
CODES
F Codes
E Codes
C Codes
P Codes
H Codes
A Codes
b Codes
r Codes
J Codes
d Codes
U Codes
y Codes
K Codes
[ 4 ] Hoist function
d170 to d189
Hoist function
The inverter is equipped with a convenient function for application for motors used to wind hoists.
Name
Description
Function code
Load detection
function
The hoisted load can be estimated, and monitoring is possible.
d170 to d174
Light load
automatic double
speed operation
function
This function increases the winding and lower speed for light
suspended loads, improving the hoist work efficiency.
d175 to d185,
d189
Overload stop
function
This function prohibits winding if the suspended load is a heavy
object.
d186 to d188
With the hoist function, hoisting is performed with forward rotation, and lowering is performed with reverse rotation.
 Load detection function
The torque is proportional to the load while moving at constant speed, and therefore the torque calculation value
(torque command value) is compensated using the gain and an offset to detect the load. On systems with no
counterweight, drive operation is applied for hoisting, and braking operation is applied for lowering, and therefore a
separate gain and offset has been set for hoisting and lowering.
Function code
Function
code
Name
Data setting range
Factory
default
Change
during
operation
d170
After detected load compensation (dedicated
monitor function code)
-327.68 to 327.67%
-
-
d171
Load conversion gain (hoisting)
0.00 to 200.00%
100.00
Y
d172
Load conversion offset (hoisting)
-100.0 to 100.0%
0.0
Y
d173
Load conversion gain (lowering)
0.00 to 200.00%
100.00
Y
d174
Load conversion offset (lowering)
-100.0 to 100.0%
0.00
Y
Conversion formula
Enable
Conversion formula
Hoisting
d170[%]=
d171
100
×
(
Torque calculation value [%] + d172
)
Lowering
d170[%]=
d173
100
×
(
Torque calculation value [%] + d174
)
Gain, offset derivation
The factory default values for gain and the offset are 100% and 0%, respectively, and d170 displays the torque
calculation values. In this condition, the d170 monitor value when hoisting at constant speed with no load is defined
as T
0
%. Furthermore, the d170 monitor value when hoisting the rated load at constant speed with no load is defined
as T
1
%. The detected load is 100% at T
1
, and the detected load is 0% at T
0
. The offset and gain can be calculated
with the following formula. The same applies to lowering.
d171,d173: gain [%]=
100
T
1
-T
0
d172, d174: offset [%]= -T
0
T
0
T
1
100
0
󱀨󱞍 [%]
󰲉

󱱕
󲒽
[%]
Detected load [%]
Torque calculation value [%]