Hitachi SJ300 Series - Manual (Page 5)

Chapter 1 – General Description
1. General Description
1.1 Functionality
Please be sure to take into account all applicable standards and regulations before applying the
SJ300EL inverter to an elevator system.
1.2 Instruction manual
This supplementary manual for the SJ300EL Elevator AC Inverter is to be used in conjunction with the
SJ300 general purpose inverter manual. Information shown in this manual takes precedence over the
manuals of the SJ300 inverter (and the SJ-FB option card manual, if used), where there are differences.
1.3 Functionality
Differences of functions versus the general purpose SJ300 inverter are shown in the following table. The
settings can be viewed or modified by the standard digital operator or the optional copy unit (SRW-0EX).
Multi-language display however is not supported with the SJ300EL and the SRW-0EX.
1.4 Added and modified functions vs. standard SJ300
# Function name Contents Remark
1 Characteristics of
S-curve acceleration &
deceleration for elevators
Characteristics of each curve portion and linear portion
can be adjusted separately.
2 Acceleration/
deceleration time setting
of multi-stage speed
Acceleration/deceleration time can be set for each
multistage speed (0-7) independently.
3 Gain adjustment
(P-gain, I-gain)
P-gain and I-gain can be adjusted for each of up to 8
(eight) preset frequencies.
4 Torque bias gain
adjustment
Torque bias setting input can be given via voltage input
or torque bias input.
5 Battery backup function Emergency drive (low speed) can be done by an
external battery in case of main power failure. Note1
6 Control mode
changeover in case of emergency
Changes the control mode to V/Hz (V/f) or SLV in case
vector control cannot function due to an encoder failure.
7 Brake control function Brake ON frequency and brake OFF frequency can be
set separately. Brake
ON and OFF wait time can be set
Separately. Additionally, delay time at brake OFF can be
set. Delay time can be set at brake OFF.
8 Encoder Errors If the signal from the encoder doesn’t correspond to the
inverter output for any reason, then the inverter displays
a trip event.
Note 1) Please contact Hitachi with the following information if the battery back-up function is needed.
- Specification of the control power supply
- Specification of the battery power supply
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