Toshiba TOSVERT VF-AS1 Series User manual

E6581319
TOSVERT VF-AS1/PS1
PG FEEDBACK BOARD Instruction Manual
1. INTRODUCTION........................................................................................4
2. NAMES OF THE PARTS ON THE BOARD...............................................5
3. CONNECTION TO THE INVERTER .........................................................6
3.1. Installation to the Inverter...................................................................6
3.2. Wiring.................................................................................................8
4. FUNCTIONAL DESCRIPTION ..................................................................9
4.1. Vector control with sensor .................................................................9
4.1.1. PG feedback wiring...................................................................9
4.1.2. Selection of encoder type.......................................................12
4.1.3. Vector control setting parameter ............................................13
4.1.4. Monitoring method for feedback amount................................14
4.1.5. Confirmation of PG's rotational direction................................15
4.1.6. PG disconnection detection function......................................15
4.1.7. Speed abnormality detect function.........................................16
4.1.8. Accuracy of speed control ......................................................16
4.1.9. Stop position control function (VF-AS1 only)..........................17
4.2. Pulse input command (speed command selection).........................19
4.2.1. Pulse command connection method ......................................19
4.2.2. Pulse input setting parameter.................................................21
4.2.3. Monitoring method of pulse input command ..........................22
5. EXTERNAL VIEW....................................................................................22
6. SPECIFICATION......................................................................................23
7. OPTION CABLE.......................................................................................24
8. WARRANTY.............................................................................................26
NOTE
1. Make sure that this instruction manual is delivered to the end user of the PG feed-
back board.
2. Read this manual before installing or operating the inverter unit, and store it in a
safe place for reference.
* The data given in this manual are subject to change without notice.
© Toshiba Schneider Inverter Corporation 2005
All rights reserved.

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Safety Precautions
On the inverter and in its instruction manual, important information is contained for pre-
venting injuries to users and damages to assets and for proper use of the device. Read
the instruction manual attached to the inverter along with this instruction manual for com-
pletely understanding the safety precautions and adhere to the contents of these manu-
als.
Explanation of markings
Marking Meaning of marking
Warning Indicates that errors in operation may lead to death or serious injury.
Caution Indicates that errors in operation may lead to injury (*1) to people or that these errors
may cause damage to physical property. (*2)
(*1) Such things as injury, burns or shock that will not require hospitalization or long periods of outpa-
tient treatment.
(*2) Physical property damage refers to wide-ranging damage to assets and materials.
Meanings of symbols
Marking Meaning of marking
Indicates prohibition (Don't do it).
What is prohibited will be described in or near the symbol in either text or picture
form.
Indicates something mandatory (must be done).
What is mandatory will be described in or near the symbol in either text or picture form.
Indicates warning.
What is dangerous will be described in or near the symbol in either text or picture form.
Indicates caution.
What the caution should be applied to will be described in or near the symbol in ei-
ther text or picture form.
1

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Handling in general
Warning
Never
Disassemble
▼ Never disassemble, modify or repair the inverter.
Disassembling the inverter could cause electric shocks, fire or injuries.
Request your TOSHIBA distributor for repairs.
Prohibited
▼ Do not remove connectors when the power is on.
It could lead to electric shocks.
▼Do not put or insert foreign objects such as waste cable, bars, or wires into the in-
verter.
It could lead to electric shocks or fire.
▼ Do not splash water over the inverter.
It could lead to electric shocks or fire.
Mandatory
▼ Wiring should be conducted after turning the inverter power off.
▼ Turn off the power immediately in case any abnormalities such as smokes, smells or
abnormal noise are found.
Neglect of these conditions could lead to fire.
Ask your TOSHIBA distributor for repairs.
Transportation and Installation
Warning
Prohibited
▼Do not install or operate the inverter if it is damaged or any part is missing from it.
Operating the inverter in a defective condition could lead to electric shocks or fire.
Ask your TOSHIBA distributor for repairs.
▼ Do not put any inflammable material near the inverter.
It could catch fire if the inverter sparks because of a breakdown and the like.
▼ Do not install the inverter where it could be splashed with water and the like.
It could lead to electric shocks or fire.
▼ When installing this option, be careful not to touch the leads from parts on the circuit
board.
Doing so could result in injury.
Mandatory
▼ Inverter must be used under environmental conditions prescribed in this instruction
manual.
Using the inverter under conditions not specified by the instruction manual could lead
to breakdown.

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Wiring
Warning
Mandatory
▼Be sure to perform the following preparatory work before proceeding to wiring.
Turn the power off.
Wait 15 minutes or more after turning the power off and confirm that the charge
lamp (on the inverter) is extinct.
Using a circuit tester that has a D.C. voltage measuring capacity of more than 800V,
check to see that the voltage remaining in the D.C. main circuit (between PC and
PA) is below 45V.
Failure to do this preparation could lead to electric shocks.
▼Tighten the terminal board fixing screws at the specified torque.
Failure to do this could lead to fire.
About operation
Warning
Prohibited
▼Do not touch inverter terminals when they are energized even if the motor is halted.
Touching terminals while the power is energized could lead to electric shocks.
▼Do not wipe the body with a wet cloth.
It could lead to electric shocks.
▼Do not pull on the cable
It could cause damage or error.
About disposal of Inverter
Caution
Mandatory
▼ Dispose of the inverter as an industrial waste.
Unless it is disposed of as an industrial waste, it will become risks for human injury.
Notes on use
Notes
▼ Do not install the inverter where the temperature or the humidity will change rapidly.
▼ Keep a distance of 20cm or more between the inverter's power cable and the encoder
cable.
Or the inverter might malfunction because of noise.

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1. Introduction
Thank you for purchasing the PG Feedback Board (PGFB board) for Industrial Inverter,
TOSVERT VF-AS1/PS1 series.
By the use of this optional board, it is possible for the VF-AS1/PS1 series inverters to con-
duct pulse row speed command and vector control with sensor. This instruction manual
describes installation and application of “PGFB board”. Read this manual carefully before
using the board.
Keep this manual near at hand of the operator who uses the “PGFB Board” for future ref-
erence in the maintenance and inspection.
* Please use this option for VF-AS1 that the software version (CPU version 1) is V124 or succes-
sor.
When it is used with the V106 or earlier software and the number of pulse inputs except
1024, the motor rotation may become unstable.
Refer to the instruction manual of the inverter for the check method of the version.
＜Description of the PGFB Board type＞
ＶＥＣ ００４ Ｚ －０
＜Confirmation on Accessories＞
Following accessories are the options to the PGFB Board.
Upon unpacking, confirm on the following items:
◎Instruction Manual: E6581319(English)
◎PGFB Board (printed circuit board), Detachable TB
Revision number
Without cable
Vector compatible type number
004: For 12V push-pull / open collector type encoder
005: For 15V push-pull / open collector type encoder
006: For 24V push-pull / open collector type encoder
007: For 5V line driver type encoder
Vector control with sensor compatible
Manual

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2. Names of the Parts on the Board
External views of the PGFB Board are described in this section together with the names of
parts on the board.
External views and names of parts on the board (terminals)
Holes for tighten board
6 ..............
5 ..............
4 ..............
3 ..............
2 ..............
1 ..............
Option connector
The detachable terminal block connector
The detachable terminal block
Terminal
Name Terminal Function
PGCC Encoder common terminal
PGVC Encoder power terminal
NB Phase B PG feedback cathode side
B Phase B PG feedback anode side
NA Phase A PG feedback cathode side
A Phase A PG feedback anode side

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3. Connection to the Inverter
Install the PGFB to the inverter according to the procedures below.
3.1.Installation to the Inverter
(1) Confirm that the all power of the inverter are turned off beforehand.
(2) Fastening the board on the inverter
(A) For VFAS1/VFPS1 200V 45kW or less, 400V 75kW or less
1. Inset the minus screw driver into the upper left hole of the front cover. And pull down and
unlock the hook.
2. Pull down and unlock the right hook of the front cover like the left hook.
3. Pull the front cover upper side, and remove the front cover.
4. Using encoder wiring terminal as the front side, push the PGFB board along with the
guide of the board. Make sure the optional circuit board connects firmly with the inverter
and the plastic bosses on the inverter case have securely fitted in the holes for fixation at
the upper and lower parts of the option board.
5. Insert the tabs at the lower part of the front cover into the slots at the lower part of the
inverter to attach the front cover to the inverter.
Note: Wait 15 minutes or more after turning the power off and confirm that the
charge lamp on the inverter is unlit.
1. 2. 3.
Detach the
front cover
5.
4.
Attach the board Attach the front cover

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(B) For VFAS1/VFPS1 200V 55kW or more, 400V 90kW or more
1. Inset the minus screw driver into the upper left hole of the front cover. And pull down and
unlock the hook.
2. Pull down and unlock the right hook of the front cover like the left hook.
3. Pull the front cover upper side, and remove the front cover.
4. Push the hooks pointed by the arrows and remove the standard option case.
5. Using encoder wiring terminal as the front side, push the PGFB board along with the guide
of the board. Make sure the optional circuit board connects firmly with the inverter and the
plastic bosses on the inverter case have securely fitted in the holes for fixation at the upper
and lower part of the option board.
6. Install the standard option case by fitting the tabs on the lower side of the option case into
the slots at the lower part of the inverter front panel.
7. Make sure the option case is securely attached to the inverter. Then, check if the plastic
bosses on the inverter case have fitted in the holes at the upper part of the option case.
8. Insert the tabs at the lower part of the front cover into the slots at the lower part of standard
option case and then attach the front cover to the option case.
3.2.
① ② ③
⑤
④
⑧
⑦
⑥
Detach the
front cover
Attach the board
Attach the front cover
Detach the standard option case
Attach the standard option case

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Wiring
When conducting wiring, follow the instructions bellow.
- Use twisted pair shield wire for signal lines.
- Applicable wire size is 0.2 to 0.75 mm².
- Peel the wire end for about 5 mm.
- When wiring, use a screw driver with the blade thickness of about 0.4 mm and width of
about 2.5 mm.
- Tightening torque for terminal base should be about 0.22 to 0.25 N・m.
- Never bind the signal lines and main circuit wiring.
<Encoder output format and PGFB board interface>
Encoder output format PGFB board wiring PGFB board interface
Complementary
Vcc
0 V
A
･B
NA･NB
A
･B
A
･B
Note:
･In case of the two-phase input,
the disconnection detection by
the hardware is valid.
(f376=2, f377=2)
･In case of the single-phase
input, the disconnection detec-
tion only by the software is
valid.
(f376=1, f377=1)
Vcc
0 V
A
･B
A
･B
A
･B
NA･NB
Note:
･The disconnection detection
only by the software is valid.
(f377=1)
Open collector
Vcc
0 V
A･BNA
･NB
A
･B
Note: The disconnection detection only by the software is valid.
(f377=1)
470 ohm
470 ohm
A
B
NA
NB
Photo-coupler
VF：1.2 - 1.7V
1k ohm
VEC004Z（12V）
VEC005Z（15V）
VEC006Z（24V）
Line driver
A
･B
A
･B
26LS31 equivalent
A･B
NA･NB
Note:
･In case of the two-phase input, the disconnection detection by the
hardware is valid. (f376=2, f377=2)
･In case of the single-phase input, the disconnection detection is
invalid. (f376=1, f377=0)
A
B
NA
NB
1k
220
220
LTC485 equivalent
VEC007Z（5V）

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4. Functional Description
In this section, functions added by the installation of the PGFB board, on top of the stan-
dard inverter functions, are described.
4.1.Vector control with sensor
Using the pulse-row feedback signal from the encoder installed on the motor shaft or load
rotation shaft, vector control with sensor can be conducted.
Speed control operation :0 speed to 150% torque, speed control range 1:1000 (1000 ppr-PG)
speed accuracy ±0.02% (50Hz base digital input)
Torque control operation :Torque control accuracy: ±10% (torque control range: –100% to 100%)
4.1.1.PG feedback wiring
In case of VEC004,VEC005Z,VEC006Z (complementary/open collector)
As for the pulse input signals, A and NA are connected for Phase A, B and NB are con-
nected for Phase B.
The polarity of the pulse input signals should be as follows:
+ side: A, B
- side: NA, NB
The encoder installation direction and signal line wiring should be determined so
that the signal that are fed back from the encoder will show the waveform shown in
Figure 4-1 in terms of the motor rotation direction.
* Forward rotation or reverse rotation is judged from the feedback pulses of Phase A
and Phase B (2-phase pulse that have 90 degrees of phase difference). Therefore, it
should be noted that, when connections are wrong, there is possibility for abnor-
mal rotation of the motor.
A
NA
B
NB
A
A
B
B
PG
V
A
VＢ
Phase A(VA)
Reverse rotation
Phase B(VB)
Phase A(VA)
Forward rotation
Phase B(VB)
X2 X1X3X4
T
Phase difference : Xn >= 0.15T(n = 1,2,3,4)
Figure 4-1 Judgement on normal and reverse rotations by the PG feedback
of two phases (Phases A and B)
<When PG feedback signal is single phase>
1. For PG feedback signal, connect terminals A and NA.
2. The judgement on forward rotation and reverse rotation is impossible.
Only the speed control mode is applicable.

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Figure 4-2 Example of complementary encoder connection
Figure 4-3 Example of open collector encoder connection
A
A
B
B
Vcc
0V
Inverter
I M
R
S
T
When single phase, connect
terminals A and NA only.
U
V
W
ST *
F
R
CC
A
N
A
B
NB
PGVC
PGCC
VEC004Z
VEC005Z
VEC006Z
E
Free run is stopped when OFF.
Forward rotation with ON and
reduce speed and stop with OFF.
Reverse rotation with ON and
reduce speed and stop with OFF.
When both forward and reverse
rotation is ON, reverse rotation.
PG
(In case of standard shipment setting.)
*In VF-PS1, please assign ST (standby)
function to arbitrary terminals.
A
B
Vcc
0V
Vcc
Vcc
Inverter
I M
R
S
T
When single phase, connect
terminals A and NA only.
U
V
W
ST *
F
R
CC
A
NA
B
NB
PGVC
PGCC
VEC004Z
VEC005Z
VEC006Z
E
With OFF, free-run stop
Forward rotation with ON and
reduce speed and stop with OFF.
Reverse rotation with ON and
reduce speed and stop with OFF.
When both forward and reverse
rotation is ON, reverse rotation.
PG
(In case of standard shipment setting.)
*In VF-PS1, please assign ST (standby)
function to arbitrary terminals.

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* Caution in case of using open collector encoder connection
In case using pulse command oscillator and open collector encoder, the rise time of the
voltage when the transistor is OFF tends to be longer than the fall time at the time when
the transistor is ON. Therefore, if the maximum input frequency becomes higher, the
pulse duty cannot maintain the 50±10% specification. Conduct derating on the maxi-
mum input frequency so that the pulse duty will be within the following specification
range.
<Derating computation formulae of open collector’s maximum input pulse frequency >
0.8 / (Maximum input frequency x A) – Voltage rise time >= 3 x 10 –6 …..(1)
A : (single phase input: 2) (two-phase input: 4)
Voltage rise time : Encoder exclusive pulse rise time + R x C
Encoder exclusive pulse rise time (s) : Please inquire at the encoder manufacturer.
R (ohm) (Input resistance) : Internal resistance 1000 (ohm) + external resistance
value (in case there is external resistance)
C (F) (Cable static capacity) : Please inquire at the cable manufacturer.
<Example>
Encoder : IRS350-500 (SUMTAK), 2-phase input
Encoder pulse rise time: 0.35 x 10-6(s)
Cable : ROVV-SB-0.2-5P-10m (Furukawa Electric)
Static capacity: 120 x 10–12 (F/m) x 10 (m)
From Formulae (1)
0.8 / (Maximum input frequency x A) – Voltage rise time >= 3 x 10 –6
Voltage rise time = (0.35 x 10–6) + 1000 x (120 x 10-12 x 10) = 1.55 x 10-6
[Maximum input frequency] <= 87912 (Pulse/s) [Single phase input]
<= 43956 (Pulse/s) [Two-phase input]
The case of VEC007(Line Driver)
As for the PG feedback signals, Terminal A and NA are connected for Phase A, Terminal B
and NB are connected for Phase B.
The polarity of the pulse input signal should be as follows.
Non-inverting input side: A, B
Inverting input side: NA, NB
The signal feedback from the encoder should have the waveform shown in Figure
4-1 in terms of the motor rotation direction. The encoder installation direction and
signal wiring should be done accordingly.
* Forward rotation or reverse rotation is judged from the feedback pulses of Phase A
and Phase B (2-phase pulse that have 90 degrees of phase difference). Therefore, it
should be noted that, when connections are wrong, there is possibility for abnor-
mal rotation of the motor.

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Figure 4-4 Example of wiring for line driver encoder (Speed/Torque switching operation)
* When using two-phase PG, motor forward and reverse rotation can be judged by PG.
When prohibition on reverse rotation is set by the inverter parameter (
f311 = 1 ) and
when the motor is rotating to reverse direction due to an external force, the inverter
starts with reverse operation in accordance with the motor’s direction for a time and
the motor will be able to shift to the forward rotation and the smooth startup be-
comes possible.
4.1.2.Selection of encoder type
The encoder type should be selected, following the table below.
Encoder Type Characteristics Maximum Wiring
Length
PG Compatible
Board
Complementary
Rated voltage output with emitter/follower combination.
High anti-nose characteristics. High-speed response.
Long-distance transmission capability.
Need to pay attention to waveform irregularity.
100m
Open Collector
The collector of the transistor is output directly.
Low anti-noise characteristics. Low-cost.
Need to pay attention to waveform irregularity and dis-
tortion.
10m
VEC004Z
VEC005Z
VEC006Z
Line Driver
IC output for high-speed transmission.
High anti-noise characteristics. High-speed response.
When transmitting over a long-distance, need to pay
attention to power voltage drop.
30m VEC007Z
A
A
B
B
Vcc
0V
Inverter
I M
R
S
T
U
V
W
ST *
F
S1
CC
A
N
A
B
NB
PGVC
PGCC
VEC007Z
E
With OFF, free-run stop
Forward rotation with ON and
reduce speed and stop with OFF
Torque control with ON and
reduce speed and stop with OFF.
F115(S1 terminal) : Set to 112.
PG
*In VF-PS1, please assign ST (standby)
function to arbitrary terminals.

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4.1.3.Vector control setting parameter
During operation with vector control with sensor, it would be necessary to set the following
parameters shown in the table below.
Table 4-1 <Basic parameters>
Title Function
Name Parameter Setting Setting at Shipment
pt 
V/F
Selection
0: Constant torque characteristics
1: Voltage decrease curve
2: Automatic torque boost
3: Sensorless vector control 1 (speed)
4: Sensorless vector control 2 (speed/torque) *
5: V/f 5-point setting
6: PM control
7: PG feedback vector control 1 (speed)
8: Sensorless vector control 2 (speed/torque) *
0
* These functions are reserved in VF-PS1 (torque control is impossible).
When conducting vector control with sensor (speed/torque control) with this board option,
pt = 8should be set.
For torque control operation, it is necessary to allocate control switching (torque/position) to
one of the terminal function selection
f110 to f118 (input terminal function selection 1 to
8) (when cmod=0) or to allocate to communication control switching (when cmod=2,
3or 4), in addition to the above parameters.
For details of adjustment methods by the speed control command and torque control com-
mand, refer to the inverter manual.
Table 4-2 Extended Parameter
Title Function Name Parameter Setting Setting at
Shipment
f375 
Number of PG input pulses 1 - 9999 500
f376 
Selection of number of PG input phases 1: Single phase input
2: 2-phase input 2
f377 
PG disconnection detection 0: Deselect
1: Select (with filter)
2: Select (Detection of momentary
power failure)
0
f400 
Auto tuning 1 0: No auto-tuning
1: Initialize motor constant (0 after
execution)
2: Continue operation continued after
auto-tuning (0 after execution)
3: Auto-tuning by input terminal signal
4: Motor constant auto calculation (0
after execution)
0
f401 
Slip frequency gain 0 - 100% 70
f402 
Auto-tuning 2 0: No tuning
1: Self-cooled motor tuning
2: Forced air-cooled motor tuning 0
f405 
Motor rated capacity (motor name plate) 0.10 - 500.0kW
f406 
Motor rated current (motor name plate) 0.1 - 2000A
f407 
Motor rated revolutions (motor name plate) 100 - 60000min-1
f410 
Motor constant 1 (torque boost) 0.0 - 30.0%
f411 
Motor constant 2 (no load current) 10 - 90%
f412 
Motor constant 3 (leak inductance) 0 - 250%
f413 
Motor constant 4 (rated slip) 0.1 - 25.0%
Depends
on type.

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The motor constant parameter (
f405 to f413 ) requires setting according to the motor
used.
For details, refer to the inverter manual.
(1) The PG number of input pulses (
f375 ) is the number of encoder output pulses per
one motor rotation.
(2) For PG input phase number selection (
f376 ), set as follows:
If the encoder pulse is single-phase: 1
If the encoder pulse is two-phase (Phase A and Phase B signal):
2
When the settings for the above (1) and (2) are wrong, the motor rotation will become
abnormal.
(3) Even though when setting up the PG disconnection detection f377=2(Select (De-
tection of momentary power failure, hardware detection)), if the Selection of number of
PG input phases f376=1(single phase), the detection method is same as
f377=1(software detection).
When f377 parameter is changed, it is necessary to turn off the power.
(Keep the inverter off until the LED turns off.)
4.1.4.Monitoring method for feedback amount
Motor rotation speed can be monitored.
The motor is equipped with status monitor which is displayed on the panel and analog
monitor which used analog output terminals (FM, AM terminals)
Set items (1) and (2) for motor speed monitoring.
(1) Speed feedback (real-time value) (Unit: Hz/free unit)
The real-time display of motor speed can be made (Monitor display setting:
53 ).
(2) Speed feedback (one-second filter) (Unit: Hz/free unit)
The filtered motor speed (feedback value) is displayed. (Monitor display setting:
54 ).
The monitoring for the above (1) and (2) is possible also in cases except for
pt = 7, 8*(PG
feedback vector control operation). For example, the monitoring can be used for confirmation
of the initial PG feedback amount in open loop (V/F operation and the like).
* This function is reserved in VF-PS1.
<Setting method for status monitoring>
In order to monitor motor rotation speed in condition monitoring, it is necessary to
change the setting for extended parameters (
f710 to f718 ).
Refer to Monitoring Operating Condition section of the inverter manual.
<Setting method for analog monitoring>
In order to monitor motor rotation speed by the analog output terminal, it is necessary to
change the setting for basic parameter (
fmsl , fm ).
Refer to Meter Setting and Calibration section of the inverter manual.

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4.1.5.Confirmation of PG's rotational direction
PG's connection in A and B phases and rotational direction of motor can be confirmed as fol-
lows.
Set the parameters changed back to the original values following confirming the rotational
direction.
(1) Set parameter pt (V/F control selected) = 0(constant torque characteristics).
(2) Set parameter f711 (status monitor 1 display selected) = 53 (Signed speed feedback
(real-time value)).
(3) Enter an operating command for positive rotation and command frequency of 1-10Hz to
the inverter.
(4) Confirm the motor be turning in the positive direction.
(5) Display status monitor 1 by using the status monitor indication of inverter.
(6) Monitor display, when PG input is determined positive turn 3Hz, “ 3.0” is displayed.
When it is determined negative turn 3.0Hz, “-3.0” is displayed. When determined nega-
tive rotation, PG's A/B phase connections and motor wiring are not correct. They must be
corrected.
4.1.6. PG disconnection detection function
* Parameter
Title Function Name Adjustment Range Setting at
Shipment
f376 
Selection of number of PG input phases 1: Single phase input
2: 2-phase input
2
f377 
PG disconnection detection
0: Deselect
1: Select (with filter)
2: Select (Detection of momen-
tary power failure)
0
* Functions
PG wiring disconnection detection can be confirmed as follows. But the disconnection de-
tection method (f377) is depended on the using encoder type and the wiring method
(f376). Please refer to the table of “Encoder output format and PGFB board interface” of
chapter 3.2 Wiring
Note1) When f377 parameter is changed, it is necessary to turn off the power.
(Keep the inverter off until the LED turns off.)
Note2) Even if f377 =1is set, PG disconnection detection do not work in the following
condition.
>When the drive is stop, it does not work.
>When the operation frequency is less than 4 Hz, it does not work.
>When the drive is deceleration operation, it may not work.

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4.1.7.Speed abnormality detect function
* Parameter
Title Function Name Adjustment Range Setting at
Shipment
f622 
Abnormal speed detection time 0.01 - 100.00sec 0.01
f623 
Overspeed detection frequency upper band 0.0: Disabled, 0.1 - 30Hz 0.0
f624 
Overspeed detection frequency lower band 0.0: Disabled, 0.1 - 30Hz 0.0
* Functions When operating the speed control with sensor (pt = 7, 8*), include during stop condition,
the feedback speed is observed. When the timer count of speed error is over the setting time,
the system trips by a speed error (e-13).
* This function is reserved in VF-PS1.
4.1.8.Accuracy of speed control
The accuracy of speed control with the PG feedback can be obtained by the following for-
mulae.
Accuracy of speed control = Command frequency accuracy + feedback detection accuracy
Command frequency accuracy = ±0.01(Hz)
F(Hz)
c x 100 x 1
2［%］
(using digital command)
Feedback detection accuracy = ±)/1())2(( 1
T
RPHPGPFC××× X 100 X 1
2［%］
FC : Inverter output frequency
P : Number of motor poles
PG : Number of PG pulses/rotation
PH : Single Phase = 1, Two-Phase = 4
RT: Refer to below table
Output frequency［Hz］
Time［s］
０
Output frequency
Feedback speed
e-13 trip (speed error)
f622 f622
f623
f624
Inverter capacity Speed response RT
- 2.2kW 300 rad/s
3.7kW - 7.5kW 180 rad/s
11kW - 90 rad/s

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4.1.9.Stop position control function (VF-AS1 only)
* Parameter
Title Function Adjustment range Example of
setting
pt V/f control mode selection
0: Constant torque characteristics
1: Voltage decrease curve
2: Automatic torque boost
3: Sensorless vector control 1 (speed)
4: Sensorless vector control 2 (speed/torque)
5: V/f 5-point setting
6: PM control
7: PG feedback vector control 1
(speed)
8: PG feedback vector control 2
(speed/torque)
0
f359 PID control switching
0: No PID control
1: Process type PID control
(temp./pressure, etc.) operation
2: Speed type PID control
(potentiometer, etc.) operation
3: Stop retaining P control
3
f360 PID control feedback control
signal selection
0: Deviation input (no feedback input)
1: VI/II (voltage/current input)
2: RR/S4 (potentiometer/voltage input)
3: RX (voltage input)
4: Optional AI1 (differential current input)
5: Optional AI2 (voltage/current input)
6: PG feedback option
6
f362 Proportional (P) gain 0.01 - 100.0 0.01
f375 Number of PG input pulses 1 - 9999 pulses/revolution 500
f376 Number of PG input phases 1: Single-phase input
2: Two-phase input 2
f381 Simple positioning completion
range 1 - 4000 100
Note: This function will not be performed if f240 (starting frequency), f241 (operation start-
ing frequency) and f243 (stop frequency) are not set at 0Hz, because a 0 Hz command
is not issued in that case.
* Functions This function, which is aimed at a retaining the load at standstill at its normal stop position, is
used along with the speed sensor vector control function to prevent the position of an ele-
vator at standstill from shifting.
Switching to position control takes place when the load is at a standstill.
The settings of these parameters take effect only in sensor speed control mode.
In speed control mode 7or 8specified with the V/f control mode section parameter (pt),
simple positioning control is performed upon receipt of a simple positioning signal, with the
position at that time used as the reference point (positional deviation: 0).
If the number of PG pulses is smaller than the area of f381, that signal can be output on
a terminal block that is set to the 118 as output terminal function.

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Ex.) When using the RR/S4 terminal as the simple positioning signal input terminal
Title Function Adjustment range Default setting
f118 Input terminal function selection 8 (RR/S4) 0 – 155 72
*1
Stop position
control mode
Run command (F)
Preset speed 1 (S1)
Preset speed 2 (S2)
Stop position command signal (RR/S4)
Preset-speed operation frequency 1 Preset speed operation frequency 2
0Time [s]
Output frequency [Hz]
f381
Positioning completion range
*1
Preset speed
operation frequency 2
If the stop position control command is entered during high-speed operation, a trip may oc-
cur because of overcurrent or overvoltage. To avoid this, do not enter the stop position con-
trol command before the motor enters into low-speed operation.
If a trip occurs because of overvoltage when stop position control is performed
If a trip due to overvoltage (op2 or op3) occurs when the motor is decelerated by stop
position control, reduce the proportional (P) gain with f362 to prolong the deceleration
time.
Note: The deceleration time setting (dec) has no effect during stop position control.
Proportional (P) gain (f362)
During deceleration
Overvoltage trip
(op2 or op3)
Time [s]
Output frequency [Hz]
Time [s]
Output frequency [Hz]
A
cceleration
Deceleration
A
cceleration

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4.2.Pulse input command (speed command selection)
It is possible to input inverter operation frequency command by pulse signals.
This command cannot be used when vector control operation with sensor is effective.
- Inverter output frequency can be controlled in ratio with the pulse output signal from the
pulse oscillator.
- By inputting two-phase pulse with 90 degrees phase difference, it is possible to input for-
ward and reverse rotation commands.
4.2.1.Pulse command connection method
Two-phase pulse input command
1. Connect pulse input signal to the point between terminals A and NA on phase A and for
between terminals B and NB on phase B
2. The polarity of the pulse input signals should be as follows:
+ side: A and B
- side: NA and NB
3. Forward and reverse operation can be judged by the pulse from the phase A and B by
using a judgement circuit together with the operational frequency command.
4. The judgement on forward and reverse rotation is made as shown in Figure 4-5.
A
NA
B
NB
A
A
B
B
PG
V
A
VＢ
Phase A(VA)
Reverse rotation
Phase B(VB)
Phase A(VA)
Forward rotation
Phase B(VB)
X2 X1X3X4
T
Phase difference : Xn >= 0.15T(n = 1,2,3,4)
Figure 4-5 Judgement on forward and reverse rotation by the two-phase (Phase A and
Phase B) pulse rows
<Caution when using open collector method>
When using open collector method in 4.1.1, the maximum frequency should be derated
by referring to the caution item.