Dear Experts,

I use SIMOTION D425-2DP/PN with SIMOTION SCOUT TIA V15.

I use LMCBasic FB library https://support.industry.siemens.com/cs/document/48816191.

I have 2 Axis which have to synchronize but I don't know the way to use GearIN command in this block.

How to use GearingIN  (relative / absolute) command of LMCBasic library ?

Can anyone help me please ?

Best Regards,

Vorapob

Depends what you need to do.

THe gear command is quite simple but can offer you a wide range of possibilities.

Tell us more like : when you gear the axes , the master is stopped or os already running ? The slave is stopped or is running ? THe gearing you need is a position gear (where the reciprocal positions are important) or is just a "speed" gear (where the relative positions are irrelevant but you want only to have the same speeds ) ?

Davinator

Depends what you need to do.

THe gear command is quite simple but can offer you a wide range of possibilities.

Tell us more like : when you gear the axes , the master is stopped or os already running ? The slave is stopped or is running ? THe gearing you need is a position gear (where the reciprocal positions are important) or is just a "speed" gear (where the relative positions are irrelevant but you want only to have the same speeds ) ?

 Dear Davinator,

I try to use Axis GearIN command but it not work.

I would like to sync speed and position of 2 Axis by Axis 1 is master when Axis_GearIN command active 1 trigger. 

How can I do help me please ?

Best Regards,

Vorapob

Dear Experts,

What is the meaning of Error ?

"PLC_1 : Axis_2_SYNCHRONOUS_OPERATION 20002 50107 : Specified synchronization or desynchronization length is less than or equal to zero"

How can to fix it ?

Best Regards,

Vorapob

Isn't it self-explaining? Set sync/desync length parameters to positive value.

Or change type of synchronization.

jacek d

Isn't it self-explaining? Set sync/desync length parameters to positive value.

Or change type of synchronization.

 Dear Jacek,

How to set sync/desync length parameters to positive value or change type of synchronization in this FBAxis Block ?

Best Regards,

Vorapob

vorapob

How to set sync/desync length parameters to positive value or change type of synchronization in this FBAxis Block ?

Manual for the FB says:

Time related or USER_DEFAULT can be selected as synchronization criterion. All synchronization conditions can be executed in SIMOTION with USER_DEFAULT by assigning the appropriate axis default values.

And in another place of the same manual:

Specification for synchronization mode Default: IMMEDIATELY_BY_TIME_PROFILE

The RELATE_SYNC_PROFILE_TO_TIME, IMMEDIATELY, SYSTEM_DE‐ FINED settings can only be specified via the userDefault.syncProfile.syncProfileReference variable.

So, in general - RTFM.

Dear Jacek,

Thank you very much for your helping.

It's so hard to use this FB.

Best Regards,

Vorapob

Well, this FB pretends that the topic is easy as it exposes to a user simple binary inputs. But all the important things (parameters) are hidden in this big data structure passed to it. Additionally some of parameters are taken directly form a TO axis/synchronous object settings. And finally most of parameters is needed or not depending on selected mode of operation.

Starting from the beginning I'd go for the MCC commands. Then you can learn what parameters are needed for which mode as MCC command mask change dynamically when selecting mode of operation. Also help for MCC is quite extensive so one can learn a lot. 

Hoping this would be helpful to some others. I am pretty new to simotion and I made this mistake.

While gear locking, ensure that you define the follower as a synchronous axis. I had gear-locked my axis to a previously defined position axis, which was throwing a lot of errors.