invert er manuals

———————— NOTICE ————————

1. Always read this manual and the "Meiden Speed Control Equipment VT240S Series Instruction Manual" before starting use. Store this manual in a safe place for reference.

2. Make sure that this manual is delivered to the final user.

MEIDENSHA CORPORATION

MEIDEN AC SPEED CONTROL EQUIPMENT

THYFREC-VT240S V24-DN4

Speed Detection 4 Option PCB

INSTRUCTION MANUAL

Oct. 2007 ST-3483

Speed Detection Option PCB V24-DN4 Instruction Manual

– 1 –

Contents Preface ......................................................................................................................................................... 2 1. Specifications ........................................................................................................................................ 2 2. Methods and precautions for mounting onto VT240S........................................................................... 2 3. Wiring example...................................................................................................................................... 7


– 2 –

Preface Thank you for purchasing the "Meiden AC variable speed device THYFREC-VT240S". This manual explains the speed detection 4 option PCB V24-DN4 mounted on the THYFREC-VT240S. Always read this manual and the THYFREC-VT240S Series Instruction Manual (Document NO. ST-3450) before using this PCB. After reading, keep this manual with the THYFREC-VT240S Series instruction manual where they can be easily accessed for reference. Make sure that this manual is delivered to the end user.

1. Specifications 1-1. Compatible encoder specifications

This V24-DN4 is a speed detection option PCB compatible with the Heidenhain encoder (ERN1387) which outputs sine wave voltage signals.

Item Specifications

Supply voltage 5VDC ± 0.25V

Interface Sine wave voltage signal

Signal • A and B sine wave voltage signal 1Vpp (incremental signal) • Zero point signal 0.5Vpp (reference mark signal) • C and D sine wave voltage signal 1Vpp (absolute signal)

Supply current 200mA

Maximum frequency 100kHz

Select sine wave signal (=4) with the encoder selection parameter (C51-0). 2. Methods and precautions for mounting onto VT240S

The mounting procedures and precautions are given below.

(1) Remove the front cover of the VT240S unit.

CAUTION

Risk of electric shock. Observe the following cautions. • Wait at least 10 minutes after turning the power OFF. Confirm that all displays on the operation

panel have turned OFF, and then remove the front cover. • After removing the front cover, confirm that the “CHARGE” LED in the unit is turned OFF. Also

confirm that the voltage between the L+1 or L+2 and L- terminals is 15V or less before starting wiring work. (If the unit is not provided with the L- terminal, check with the "CHARGE" LED.)


– 3 –

(2) Mount onto the control PCB cover option I position.

Jaw

(1)

(2)

Option I mounting position

V24-DN4

Option I fixing jaw

Enlarged view

Mounting method 1. Insert the option PCB into the two jaws in the (1) direction. 2. Confirm that the PCB is mounted, and then press the PCB in the (2) (control PCB cover)

direction. Fix with the option I fixing jaws. 3. Finally, confirm that the PCB is mounted correctly.

V24-DN4 PCB shape

(3) Connect the wires to the option PCB. Use 0.75mm2 (3m or less) shielded twisted pair wire strands for the wire. Connect the shielded wire to the terminal TB2.

(Note 1) If the inverter operates incorrectly when the shielded wire is connected to terminal TB2,

disconnect the shielded wire from TB2, and connect the encoder side shielded wire to the encoder's grounding terminal. The state may be improved.


– 4 –

Treat the end of the connected wire as shown below. 5mm

Shielded

To TB2

CAUTION

Since the sensor's faint signals are handled, keep this wire as far away from the inverter's input/output cable to prevent malfunctioning caused by noise.

Terminal block (TB1) layout

Pin No. Symbol Function

1 0RP 5VDC power supply common

2 PAN Encoder A phase -not input signal

3 PBN Encoder B phase -not input signal

4 PZN Encoder Z phase -not input signal

5 PCN Encoder C phase -not input signal

6 PDN Encoder D phase -not input signal

7 0RP 5VDC power supply common

8 5RP 5VDC power supply

9 PA Encoder A phase input signal

10 PB Encoder B phase input signal

11 PZ Encoder Z phase input signal

12 PC Encoder C phase input signal

13 PD Encoder D phase input signal

14 5RP 5VDC power supply

(Note) This is indicated as the R phase with the Heidenhain encoder. When using the VT240S, input to the zero point signal Z phase.

No. 1 pin No. 7 pin

No. 8 pin No. 14 pin

No. 8 pin from left on upper level → No. 14 pinNo. 1 pin from left on lower level → No. 7 pin


– 5 –

(Note 2) This PCB cannot be used where the encoder supply current (including signal supply current) exceeds 200mA.

(Note 3) The 24-DN4 A, B, Z, C and D phase pulses are as shown below when the motor is rotating

in the forward direction. The A, B, Z, C and D phases indicate the A, B, Z, C and D differential voltage in respect to A, B, Z, C and D.

The A and B phase are output at a multi-cycle (i.e., 2048) in one motor rotation.

The sine wave is converted into a pulse. In the waveform which has been pulse-converted, the B phase is Low, the Z phase is High and the A phase rising edge is required.

The sine wave is converted into a pulse. In the waveform which has been pulse-converted, the B phase is Low, the Z phase is High and the A phase edge is required.

C and D complete one cycle per zero point signal pulse (One cycle in one motor rotation)

360°

90°

A

Z

B

360°

90°

A

Z

B

C

D

Z

360 °

90 °


– 6 –

With the VT240S, the counterclockwise rotation (CCW) looking from the motor shaft is defined as forward run, and clockwise rotation (CW) is defined as reverse run.

Forward run (CCW) Reverse run (CW)

Definition of VT240S motor rotation direction

Note) The definition for Heidenhain (ERN1387) is the opposite of VT240S, so set the encoder advance so that it is opposite (C50-2=2).


– 7 –

3. Wiring example

A/D Converter

-9 [PA]

-2 [PAN]

-10 [PB]

-4 [PZN]

-3 [PBN]

-5 [PCN]

-11 [PZ]

-12 [PC]

-6 [PDN]

-13 [PD]

-8,14 [5RP]

-1,7 [0RP]

Encoder ERN1387

Option PCB V24-DN4

TB2

0.75mm2 (10m or less) Twisted, shielded strands

Polyethylene insulated instrument cable Reference type KPEV-SCF (FURUKAWA ELECTRIC)

A+

A-

B+

R+

R-

B-

C+

C-

D+

D-

5V

0V

TB1

5VDC MAX.200mA

Shield

Documents

invert er manuals