Hitachi SJ300 Series - Manual (Page 19)

Chapter 2 – Explanation of Functions
2.6 Control mode changeover in case of emergency
If the elevator cannot operate in vector mode with feedback mode (due to encoder failure, for
example), the control mode can be changed to V/f or SLV mode to allow short term emergency
operation. Changeover is initiated by an intelligent input configured to the [ECM] function.
NOTE: Do not use this mode as a normal operation mode.
< Additional setting items>
Function
Code
Function Name Setting
A244
Control mode on
emergency changeover
00: V/f constant torque
01: V/f variable torque
02: sensorless vector SLV
03: 0 Hz domain SLV
C001
- C008
Intelligent input
terminals 1 - 8
Set to 52: ECM
2.7 Braking control function
The following functions are added to the brake control function vs. the standard SJ300 series.
1. Brake ON and OFF frequency
Brake ON frequency and brake OFF frequency can be set separately.
2. Delay time at brake (BRK) OFF
Delay time can be set at brake OFF.
(example 1) Timing chart below shows result when brake confirmation signal (BOK) is not assigned
b121 Waiting time for
releasing brake confirmation
b127 Brake OFF frequency
b125 releasing
frequency
time
b128 Delay time at
brake signal is
turned OFF
RUN command (FW/RV)
Output
frequency
Brake release
Output (BRK)
b123 Waiting time for
release brake confirmation b122 Waiting time
for acceleration
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