Hitachi S1 Series User Manual

S1 series standard inverter
-45-
Function
code
Name
Detailed parameter description
Default
value
5: Modbus communication
6 - 11: Reserved
Note: Source 1–5, 100% relative to three
times of motor current.
P03.19
Source of upper limit setup
of brake torque
0: Keypad (P03.21)
1–10: the same as P03.18
0
P03.20
Set upper limit of the torque
when motoring via keypad
0.0–300.0% (rated motor current)
180.0%
P03.21
Set upper limit of brake
torque via keypad
180.0%
P03.22
Flux-weakening coefficient
in constant power area
0.1–2.0
0.3
P03.23
Min. flux-weakening point
in constant power area
10%–100%
20%
P03.24
Max. voltage limit
0.0–120.0%
100.0%
P03.25
Pre-exciting time
0.000–10.000s
0.300s
P17.32
Flux linkage
0.0–200.0%
0.0%
5.5.4 V/F control mode
S1 inverter also carries built-in V/F control function. V/F mode can be used in cases where mediocre
control precision is enough. In cases where an inverter needs to drive multiple motors, it is also
recommended to adopt V/F control mode.
S1 inverter provides multiple kinds of V/F curve modes to meet different field needs. Users can select
corresponding V/F curve or set the V/F curve as needed.
Suggestions:
1. For the load featuring constant moment, eg, conveyor belt which runs in straight line, as the
moment should be constant during the whole running process, it is recommended to adopt
straight-type V/F curve.
2. For the load featuring decreasing moment, eg, fan and water pump, as the relation between
its actual torque and speed is squared or cubed, it is recommended to adopt the V/F curve
corresponds to power 1.3, 1.7 or 2.0.

Hitachi S1 Series Specifications

General

Output Frequency	0 - 400 Hz
Overload Capacity	150% for 60 seconds
Frequency	50/60 Hz
Control Method	Sensorless Vector Control
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheat, Short Circuit
Communication	RS485, Modbus RTU
Output Voltage	3-Phase 200-240VAC, 3-Phase 380-480VAC (Matches Input Voltage)
Cooling Method	Fan Cooled