HELLO EVERY ONE ,

I CONTROL SERVO MOTOR BY S110 DRIVE, I SELECT IN CONFIGURATION AND IN MC_HOME PASSIVE HOME BY DIGITAL INPUT ,WHEN I ENABLE EXECUTE BIT THE MOTOR DID NOT START MOTION TO HOME POSITION , PLEASE CAN YOU HELP ME HOW TO LET MOTOR GO TO HOME POSITION EVEN THAT WITH ANY HOMING MODE (ACTIVE OR PASSIVE).  

*I ENABLE MC_POWER

THANKS Mr. Technology Team FOR YOUR USEFUL REPLY,

IT'S GIVE ME ERROR AS IN PICTURE BECAUSE I HAVE ABSOLUTE ENCODER AND HOMING MODE No. 10 NOT ACCEPTED BY ABSOLUTE ENCODER,

NOW I CHANGE HOMING MODE TO No. 7, TO BE OK FOR ABSOLUTE ENCODER BUT NOW I FACE PROBLEM BEFORE POWER OFF I HAVE POSITION 142 AFTER POWER ON I HAVE RANDOM POSITION LIKE 6.2 OR 2.9 , WHAT I KNOW WHEN POWER OFF AND ON WITH  ABSOLUTE ENCODER ,IT SAVE CURRENT POSITION (SHOULD GIVE SAME POSITION BEFORE POWER OFF).

*WHEN ENABLE EXECUTE MC_HOME IT IS GIVE ME DIRECTLY ZERO POSITION (0.0) WITHOUT MOTOR RUN TO 0.0 POSITION.

WHAT I NEED TO KNOW HOW MOTOR TO RUN AND GO ACTUAL TO 0.0 POSITION OR SAVE CURRENT POSITION AFTER POWER OFF AND ON.

THANK YOU.

Hi,

when you have a absolute encoder you should use mode 6 or 7.

And you should select "cyclic absolute" in the TO configuration as encoder setting.

THe reason why you have small random values after the homing and not exact 0.0 is that the axis simply moves a little bit after the homing command. In the exact moment of homing the axis position is set to 0.0. If then the encoder data is jittering a little bit, the position will slightly change. Does the motor have a holding brake? If not it is normal that the position changes a little in uncontrolled standstill - depending on the load of course.

THANKS Mr. Robert for USEFUL REPLY,

I HAVE RANDOM VALUES AFTER POWER OFF AND ON NOT AFTER HOMING , THE PROBLEM IS ENCODER DID NO SAVE LAST POSITION BEFORE POWER OFF.

I NEED TO KNOW HOW LET ENCODER SAVE LAST POSITION BEFORE OFF , OR IF CAN NOT DO IT HOW MOTOR WILL GO TO PHYSICALLY HOME POSITION NOT CHANGE VALUE TO HOME POSITION WITHOUT MOVING.

Ahh okay, understood now. 

Please go to your TO configuration and check the encoder setting. I guess your setting is "absolute". You should change it to "cyclic absolut" if not done so far. Maybe this solves your problem.

In general with homing mode 6 or 7 the PLC should automatically store the encoder offset remanently in its memory so that it can reproduce the absolute position of the encoder also after a power off/on.