Hitachi SJ300 Series - Manual (Page 33)

Chapter 4 – Adjustment
4. Adjustment
4.1 Frequency Source Setting
Select frequency source for operation. There are two typical command sources for
elevator applications:
1. Speed Reference by multi-speed
2. Speed Reference by analog voltage or current input
Consider their features to select the command sources best suited to your application.
1. Multi-speed
The multi-speed feature allows you to preset various speeds (up to eight) by
programming the desired speed values to parameters A020 to A027. For
example, you could preset high, mid, low, leveling, creep, and maintenance
speeds. Then the desired speed can be selected using the intelligent input
terminals. The multi-speed selection can be configured as binary or bits via
parameter A019. (Refer to SJ300 Instruction Manual)
In this case, softer acceleration and deceleration can be obtained by setting A097
and A098 parameters to S curve (03) or EL-S curve (04). Frequency source
setting (A001) should be set to 02 (operator).
2. Analog Voltage or Current Input
Speed can be controlled by analog voltage [O](0 to 10V) or analog current [OI](4 to
20mA). This method of frequency reference source might be used in order to
utilize the acceleration or deceleration curves generated by a specialized elevator
controller. Consequently, acceleration and deceleration time should be set close
to the filter constant, and below 1/20 to 1/50 of acceleration/deceleration time
generated by external the elevator controller.
The analog input is filtered as the average of 8 values (default setting of
parameter A016), with a sample rate of every 2ms. In the case of near minimum
acceleration time (0.01s), the inverter response may be slower due to the setting
of the analog input filter.
In this case, acceleration curve (A097 and A098) should be set to linear (00). The
frequency source setting (A001) should be set to terminal (01). An intelligent input
terminal must be configured for the [AT] function (16), and should be turned on or
off (via jumper or programming) to select the [0] or [0I] terminal, as appropriate.
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