Fuji Electric FRENIC-Multi Series, Instruction Manual

Page: 27 / 40

7-3
7.4 Description of the Control
The PG interface card allows the inverter to internally count feedback pulses issued from the
encoder (PG) and control the motor so that the control object starts moving from the previously
specified start point (S point), decelerates and switches to the creep speed operation to arrive at the
specified stop position (E point).
Turning a run command ON with "Start/reset" command
S/R being ON starts the positioning control.
See Figure 7.1 "Positioning Control Model" and Table 7.4.
ON
ON
ON
Frequency Hz
Ac
cl
tim
e (
F0
7/E
10
)
Time
ST (J73)
L (J78, J79)
S point
(J74, J75)
E point
(J81, J82)
Reference
frequency
0
Z point
(J76, J77)
Creep speed (J80)
ER (J83)
CP (J85)
Run command OFF
Time
ET (J84)
Timer output TO OFF
Positioning
completed PSET
OFF
Note: The current position must be within E +/- ER
point after the time ET has elapsed.
Decl time
(F08/E11)
De
cl ti
m
e (F
08/
E1
1)
ON
Start/reset S / R OFF
t
Figure 7.1 Positioning Control Model
• The positioning control applies to motor 1 only.
• During jogging (inching) operation or when the PID control is enabled (J01
≠
0), the
positioning control is disabled.
• An undervoltage alarm that occurs in positioning control triggers an alarm
ero
;
however, the inverter does not enter the restart mode (specified by F14).
• Enabling the positioning control disables the auto-reset function specified by H04 and
H05.
The operation status in positioning control can be displayed on the keypad by using
Menu #3 "Drive Monitoring." For details, refer to Section 7.6 "Monitoring." (See the
description of function code E52.)