Connecting And Testing The Encoder(S); Execute The Encoder Test Program; Checking Master Encoder For Synchronizing Applications; Ending The Encoder Check - Danfoss MCO 305 Operating Instructions Manual

How to Install
33-1* Synchronization
33-10 Sync Factor Master
33-11 Sync Factor Slave
33-15 Marker Number for Master
33-16 Marker Number for Slave
3 3
33-17 Master Marker Distance
33-18 Slave Marker Distance
33-19 Master Marker Type
33-20 Slave Marker Type
•
33-17 Master Marker Distance
•
33-18 Slave Marker Distance
When using the encoder zero pulse as marker signal the
distance between 2 markers is the resolution (qc) of the
encoder.
When external marker signals are used, the marker
distance can be measured by means of the program
sample "Marker count".
•
33-19 Master Marker Type
•
33-20 Slave Marker Type
Master marker signal: Input 5
Slave marker signal: Input 6
Marker signal type must be selected for master and slave:
Default setting is [0] Encoder Z positive flank for both.

3.5 Connecting and Testing the Encoder(s)

NOTE
The controller and the motor must be able to be switched
off at any time with an EMERGENCY STOP button.
The motor must be able to turn completely freely so that a
sudden jolt can not cause damage.
NOTE
If not yet connected, now is the time to connect and test
the encoder. When using an absolute encoder, enter [0] in
32-00 Incremental Signal Type and in 32-02 Absolute Protocol
the used type of encoder. Then enter the resolution in
32-03 Absolute Resolution.
WARNING
Turn off the power before connecting the encoder.
Each encoder channel (A, B, Z, and D) is monitored, open
circuit as well as short circuit is detected. A green LED
shows the status of each active channel, LED on means
that the channel is ok. Monitoring if the channels are
automatically enabled/disabled depending on the selected
encoder type, e.g. A, B, and Z is monitored when an
incremental encoder is selected. Additionally an alarm will
be triggered if encoder monitoring is activated in
32-09 Encoder Monitoring and 32-39 Encoder Monitoring.
16
MCO 305 Operating Instructions
Check the encoder connections by means of the test
Default
program: Select the file "Enc-S.m" via the MCT 10. APOSS
1
and with that the file is opened automatically .
1
1

3.5.1 Execute the Encoder Test Program

1
4096
In the Development menu click on→ Execute to start the
4096
test program. Run the frequency converter forward for
[0] Enc. Z pos.
example in hand mode – [Hand on] key – then the
[0] Enc. Z pos.
position must count positive. If the position is counting
negative, swap A and B channels from the encoder or two
motor phases. If the motor is turned on by hand (the
motor should not be connected!), test whether the
encoder functions: 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 Counts per
Revolution is 500.
3.5.2 Checking Master Encoder for
To check the master encoder change the test program:
replace the command APOS by MAPOS in "Enc-S.m" and
run the master forward then the master position must
count positive as well. If the position is counting negative,
swap A and B channels from the master encoder.

3.5.3 Ending the Encoder Check

End the test of the encoder with the [Esc]-key and close
the test program with File Close. A successful test of the
encoder is a requirement for further starting up of
operations. Repeat the test when using other encoders.
What to do, if ... ?
....the encoder does not work?
This could be a result of incorrect cable installation.
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
specification.
....the count is descending?
If the Count is Descending with an incremental encoder,
exchange the feedback encoder track A by B and A/ by B/.
If there is no counting in the display then check the wiring
of the encoder.

3.6 PID Controller Settings

This is a quick guide to set-up the PID controller, further
details can be found in the chapter "Optimizing the PID
controller".
®
MG.33.K3.02 - VLT is a registered Danfoss trademark
Synchronizing Applications