Hitachi SJ300 Series Manual

SJ300 Closed Loop Vector Control

Electronic Gearing (Master/Slave)

1. Scope

1.1. The scope of this document is to provide a step-by-step procedure for setting up a

SJ300 for closed loop vector control (electronic gearing).

2. Parts

2.1. SJ300-XXXXFU– quantity 2

2.2. DOP-PRO (optional) – quantity 1

2.3. SJ-FB – quantity 2

2.4. 5 vdc quadrature differential encoder – quantity 2

2.5. Drive rated motor – quantity 2

3. Tools

3.1. Flat blade screwdriver

3.2. Philips screwdriver

3.3. Diagonal cutters

3.4. Wire strippers

4. Reference material

4.1. NB613X Hitachi SJ300 manual

4.2. NB616X Hitachi SJ-FB manual

4.3. NEC article 430

4.4. Nation Electrical Installation Standards (NEIS)

4.5. NEMA ICS 2.3

4.6. EASA Understanding Energy Efficient Motors

5. Definitions

5.1. Vector control – the magnitude and phase of the ac motor’s stator current vector

is to be controlled by producing constant magnetic flux while generating the

necessary component of torque producing current.

5.2. Closed loop vector control – vector control using an external feedback device

like an encoder or resolver.

5.3. Open loop control – Any control that does not use a feedback device.

5.4. Velocity – accurate speed regulation through closed loop vector control.

5.5. Electronic Gearing – Master drive controlling slave drive(s) through feedback

loop.

6. Hardware set-up (performed on both master and slave drives)

6.1. Power-up testing procedure should have been performed prior to SJ-FB set-up

reference SJ300 manual page 2-17.

6.2. Gain access to inside front cover of SJ300 following directions on page 9 of SJ-

FB manual.

6.3. Install encoder cable following channel pin-out to terminal one of SJ-FB board.

6.3.1. Pay attention to the torque of the terminals to ensure proper installation.

6.4. The closed loop vector set-up does not require any additional configuration of the

SJ-FB including dipswitches and wiring at this time in the set-up process.

7. Drive parameter set-up (performed on both master and slave drives)

7.1. Preliminary test.

7.1.1. The goal is to set-up both master and slave drive as a standard closed loop

vector drives first before making the minor changes for electronic gearing.

7.1.2. Parameter changes.

A081 00 – AVR Always on

A082 XX – Motor nameplate voltage

A001 00 – Speed reference local control

A002 02 – Run enable local control

7.1.2.1.These parameters will allow the drive to be driven locally to verify the

operation of the system in constant torque mode prior to closed loop

control.

7.2. Run test.

7.2.1. Parameter changes.

A044 05 – closed loop vector control

P010 01 – option card valid

7.2.1.1.The drive is now in closed loop vector mode; and must be tuned prior

to run.

7.2.2. Tuning.

7.2.2.1.Follow auto-tuning procedure on page 4-67 of SJ300 manual.

7.2.2.1.1. It is recommended to perform auto-tune procedure with active

rotation (H001 – 02)

7.2.2.2.H002 must be set to 01 or 02 after tuning is complete.

7.2.3. Run.

7.2.3.1.Ensure speed pot on front of keypad is turned to 0%.

7.2.3.2.Press the run button and see if run indicator in illuminated.

7.2.3.3.Slowly bring up speed reference and verify rotation.

7.2.3.3.1. Note – If the motor acts erratic or trips out (over-current)

quickly, then swap the poles of the B channel on the SJ-FB card.

7.2.4. Test completion.

8. Electronic Gearing

8.1. Feedback set-up.

8.1.1. Hardware

8.1.1.1.Install pulse output cable from last 4 terminal screws on terminal 2 of

master SJ-FB to the first 4 terminal screws on terminal 2 of the slave

SJ-FB (see page 25 of SJ-FB manual).

8.2. Master drive set-up.

8.2.1. It is no different than the standard SJ300 closed loop vector control

scheme for velocity already set-up.

8.2.1.1.The pulse output from the last 4 terminal screws on terminal 2 is

always present regardless of set-up if SJ-FB is plugged in.

8.3. Slave set-up.

8.3.1. Parameter changes.

P012 01 – APR mode (position)

C001-C008 (any single address) 48 – STAT pulse train input valid

C001-C008 (any single address) 47 – PCLR position deviation clear

C001-C008 (any single address) 46 – LAC LAD cancel

A001 04 – pulse speed reference

8.3.2. Switches must be installed for the 3 smart terminals assigned to 46, 47,

and 48.

8.3.2.1. STAT pulse train input valid is the on/off switch that tells the slave to

accept the pulse train from the master source.

8.3.2.2.PCLR pulse train clears the register that holds the count value of

pulses accumulated from the master source.

8.3.2.3.LAC (LAD cancel) this switch eliminates the acceleration and

deceleration time of the slave drive (be very cautious with this

function).

8.4. Electronic gearing fine-tuning.

8.4.1. The initial set-up is for straight 1 to 1 gear ratio.

8.4.1.1.The parameters P020 and P021 allow the user to adjust the ratio to

accommodate the requirements that the process dictates.

8.4.2. The slave gear is a little off adjustment for speed matching.

8.4.2.1.Adjust P022 and P023 for fine tuned speed adjustments.

9. Tips

9.1. When using DOP-PRO and getting “com” errors periodically, instead of cycling

power to the drive, try selecting online monitor. Once online monitor is

established, exit and try to upload/download again.

9.2. If the hertz display (D001) shows increasing hertz, but the motor does not move,

try the following tips:

9.2.1. Cycle power to drive and resume run test.

9.2.2. Connect to Trend on the DOP-PRO software.

9.2.2.1.You may get an E11 alarm, clear and resume run test.

9.2.3. Conduct a second auto-tune and ensure H002 is set to 01 or 02.

TM2 –

second 4

terminals

are pulse

output to

slave

devices

TM1 – encoder wire

connections for closed

loop vector control

TM2 – first 4 terminals

are pulse in control

48, 47, and 46 must be

addressed to 3 intelligent

input terminals on the slave

drive.

A081 – set to 00

A082 – set to value to

motor nameplate

voltage

A001 and A002 set

to local control for

initial testing

urposes

ote: A001 of slave

must be set to 04

after initial testing is

erformed (refer to

art 8.3 of this

document).

A044 – set to 05 for

closed loop vector

control

ote: It is suggested to go

through the local auto-

tune procedure versus

using the software wizard.

After auto-tune is

complete (symbol ___0)

Ensure that H002 is set to

01 or 02

P012 – set to 01 on slave

ONLY! (refer to 8.3 of

this document).

P010 – set to 01 for both

velocity and electronic

gearing.

After initial electronic

gearing tests are performed,

the gearing ratio can be

changed by these

arameters (P20 & P21).

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