Fuji Electric FRENIC MEGA G2 Series - Page 544

5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
5-360
 Overtravel (OT)
Machine failure or an accident may occur if the motor passes the travel boundary point. Passing of the travel boundary point can
be detected with hardware, and a digital signal can be input as an overtravel (OT) signal. Following OT detection, the motor
decelerates and stops in the H56 forced deceleration time, and the servo lock is applied. If function code d280 = 1, an Er6 alarm
occurs after the motor decelerates and stops. A plus side overtravel “+OT” and minus side overtravel “-OT” can be assigned
individually. In the interests of safety, overtravel signals are enabled (contact b) when OFF. If an overtravel is detected, overtravel
detection signal “OT-OUT” is output with digital output.
Function
code
Name
Data setting range
Factory
default
Change
during
operation
E01 to E09
E98
E99
Terminal [X1] to [X9]
(Function selection)
Terminal [FWD]
(Function selection)
Terminal [REV] (Function selection)
139(1139): + direction overtravel “+OT”
140(1140): - direction overtravel “-OT”
-
N
d280
Operation during emergency stop
0: Servo lock after deceleration stop
1: Er6 alarm after deceleration stop
0
Y
Operation is possible if position data is updated to the return direction with the servo lock applied (d280 = 0) following OT detection,
and control is changed to speed control, and a run command is issued to move the motor in the return direction. However, if “-OT”
is input while the motor is traveling in the plus direction, or “+OT” is input while the motor is traveling in the minus direction, the
motor does not move in either direction until the OT is cleared.
 Software OT
Overtravel (OT) is basically used to detect the boundary travel point with hardware, but the boundary point position can be set
with the pulse count. This is known as a software OT. A + software OT and - software OT can be set individually. The operation
when a software OT is detected can be selected with d222. If no OT for such as the rotor exists, use with the factory default value
of d222 = 0.
Function
code
Name
Data setting range
Unit
Factory
default
Change
during
operation
d222
Software OT operation selection
0: Disable software OT (endless)
1: Limit target position with software OT
2: Emergency stop when software OT
detected
-
0
Y
d225
+ software OT detection position -
4 higher order digits
-9999 to +9999
U
+9999
N
d226
+ software OT detection position -
4 lower order digits
0 to 9999
U
9999
N
d227
- software OT detection position - 4
higher order digits
-9999 to +9999
U
-9999
N
d228
- software OT detection position - 4
lower order digits
0 to 9999
U
9999
N
 d237 Positioning data type (INC/ABS switching)
It is possible to switch between handling the positioning data set for positioning data 1 to 8 as the absolute position,
or as travel. If wishing to switch how the data is handled whenever necessary, use digital input terminal function
travel/absolute position switching “INC/ABS” (data = 135). By assigning “INC/ABS” to the digital input terminal, the
d237 setting becomes invalid.
 d238 Positioning data selection signal agreement timer
If switching between positioning data selection 1 “POS-SEL” and positioning data selection 4 “POS-SEL4”, the
selected positioning data may change due to chattering. If this happens, set the time until the positioning data settles
in d238.