Hitachi SJ300 Series - Manual (Page 16)

Chapter 2 – Explanation of Functions
< Total weight output and items to be set >
Torque to be added (%)
< Additional setting items>
Function
Code
Function Name
d107 Point A (FW deviation) monitor
d108 Point B (RV deviation) monitor
Total weight output (V)
Gain (FW/RV side)
0
Regen.
Balanced point
Power
V1: Balance value
10
If 10V
≥ total weight output Æ converted value to 10V
200
Figure 5 – Balance Point
< How to adjust >
Bias weight adjustment and gain adjustment of the analog weight signal are required when using the
torque bias function.
c Bias weight adjustment (Balance adjustment)
Put weight in the elevator car to balance it with the counterweight. Then adjust the following parameters to
make the deviation values at points A (d107) and B (d108) 0 (zero).
Balance value (P110, P111) = [%]
] [
] [
100
V 10
V V
1
1 ×
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
V1 : Voltage when the car and counterweight are balanced (see Figure 5).
d Gain adjustment
Gain =
] [ ] [
] [
.
V V V V
V 10
82 1
100
1 2
−
Ч Ч
α
α
: Torque bias value (%) at maximum load weight
V1: Voltage when the car and counterweight are balanced
V2: output voltage of the sensor at maximum load weight
2.5 Battery backup function
This custom function allows emergency operation at low speed via an external battery or UPS system in
case of main AC power failure. This feature is NOT standard. Please contact Hitachi representatives with
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