Control Mode Changeover In Case Of Emergency; Braking Control Function - Hitachi SJ300-EL Series Instruction Manual Supplement

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
Function Name
Code
Control mode on
A244
emergency changeover
C001 Intelligent input
- C008 terminals 1 - 8
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
Output
frequency
RUN command (FW/RV)
Brake release
Output (BRK)
Setting
00: V/f constant torque
01: V/f variable torque
02: sensorless vector SLV
03: 0 Hz domain SLV
Set to 52: ECM
b125 releasing
frequency
b122 Waiting time
for acceleration
Chapter 2 – Explanation of Functions
b121 Waiting time for
releasing brake confirmation
19
b127 Brake OFF frequency
b128 Delay time at
brake signal is
turned OFF
b123 Waiting time for
release brake confirmation
time