6-30
6.2.4.4 Line speed control
This connection example illustrates how to
perform speed control after installing a line
driver output type encoder on a system's
winding line. Since motor speed feedback
and line speed feedback can be detected
simultaneously, it is possible to prevent a
runaway operation scenario resulting from a
cause such as a paper tear on the line. When
using the PG interface expansion card in an
application such as this one, it must be set to
LD.
Figure 6.2.16
Figure 6.2.17
Note: As a rule, shielded wires are earthed. However, if excessive induced noise from external sources
affects the system, the effects of such noise can be reduced by connecting shielded wires to 0 V.
6.2.4.5 Pulse train operation and synchronized operation
• When using the FRENIC-VG's [FA] and [FB] open collector outputs to perform master/slave synchronized
operation, separate open collector wiring from power lines and keep wiring runs as short as possible. When
using long-distance wiring, it is recommended to provide a separate converter to convert the signals into line
driver signals.
When using the PG interface expansion card in this application, set switch SW1 to PR.
Figure 6.2.18
MOTOR
FRENIC-VG
OPC-VG1-PG(LD)
U
V
W
M
PG
[PGP]
[PGM]
[PA]
[PB]
SS,E
Main power supply
3-phase power supply
50/60Hz
Gears
[PGP]
[PGM]
[PA]
[*PA]
[PB]
[*PB]
PE
Winding
Direction of line
operation
[TH1]
[THC]
NTC thermistor
L1/R
L2/S
L3/T
E
E
OFF
1
2
MODE
PD
LD
PR
SD
ON
OFF
OFF
1
2
MODE
PD
LD
PR
SD
ON
OFF
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