Technical data

ManualsBrandsDanfoss ManualsMedia ConverterVLT 5000 FLUX

VLT 5000/5000 FLUX SyncPos Quick-Setup

MG.10.Q1.5B – VLT is a registered Danfoss trade mark10

drive forward for example in local mode (Parameter

002 = ”Local”) then the position must count positive. If

the position is counting negative you must swap A and

B channels from the encoder or two motor phases.

You can also turn the encoder by hand (the motor

should not be connected!). The position is

continuously registered in the communications

window.

For a full rotation you should receive 4

times the value of the resolution of the encoder, that

means 2000 if the Encoder pulses per revolution is

500.

Ending the encoder check

End the test of the encoder with the

[ESC] key and

close the test program with "FILE"

→→

→ "CLOSE".

successful test of the encoder is a requirement for

further starting up of operations.

If the encoder doesn’t work

If the VLT parameter 002 is "LOCAL" please change

it = "REMOTE". Click on "DEVELOPMENT" and

start the test program with "EXECUTE"

[F5].

The test is successful if the motor runs slowly back

and forth and position 500 is registered.

End the test with [ESC] and "CLOSE" the "FILE".

If the motor doesn’t move

This could be a result of incorrect cable installa-

tion.

Measure the signals coming from the

encoder and compare them to the values listed in

the specifications.

Check whether the connection

was made according to the application.

If the motor doesn’t move at all, then the propor-

tional factor of the PID filter is probably too low or

the VLT has not been enabled.

Another possibility

is that the encoder resolution is high. Therefore

we recommend to change line 17 "POSA500" to

be half the encoder resolution in quadcounts.

E.g. encoder ppr is 4096. Line 17 should be

changed to (4096 x 4/2) "POSA 8192".

Check the VLT enable (terminal 27 = 24 V) and

check that the VLT wasn't stopped via the LCP

(flashing display). Then increase the

ProportionalProportional

Proportional

factor factor

factor (parameter 702). (See following chart).

■■

■ Execute the test run program

Now connect the motor to the VLT, make sure

that the motor can turn completely freely.

NB!

The motor must be provided with an

[EMERGENCY STOP] button.

NB!

Turn off the motor immediately with

the EMERGENCY STOP button if it

vibrates heavily or sets off uncontrolled.

Click on "FILE" and "OPEN"

the file

Move-S.m Move-S.m

Move-S.m.

Encoder ppr (ENCODER) Proportional (KPROP) par 702

500 200

512 200

1000 100

1024 100

2000 50

2048 50

2500 50

3600 25

4096 25

5000 25

If the encoder is not mounted on the motor please

note the gear-ratio between motor and encoder.

Use this ratio to multiply the Proportional factor. E.g.

motor turns 2 rev. encoder turns 1 rev. ratio is 1:2.

Multiply the Proportional factor with 2.

If the motor vibrates heavily...

… then you have to: reduce the

ProportionalProportional

Proportional

factor factor

factor KPROP (11). If the drive stops due to a “O.

Err. 8 in the LCP" then it is necessary to increase

the

olerated position error olerated position error

olerated position error POSERR (15). (See 10

steps to optimise the PID loop).

Checking encoder connections