hello

I need to stop , as fast as possible my motor , which controlled by pulse direction from  s7-1214.

is there any  system bit which clear the pulse  outputs to the drive ?

thanks

lio5

hello

I need to stop , as fast as possible my motor , which controlled by pulse direction from  s7-1214.

is there any  system bit which clear the pulse  outputs to the drive ?

thanks

 Hello lio5,

There is not that much info in your post, I will try to read between the lines.

If you use the instruction CTRL_PWM to send this pulse output, you just have to disable the input enable.

Best regards,

Hugo

If you are using the standard TO's and the MC_ commands for Pulse/Direction control, then simply remove the MC_Power Enable.  From the S7-1200 Motion Control Function Manual,

Configure the emergency stop deceleration of the axis in the "Dynamics emergency stop"

configuration window. When an error occurs and when the axis is disabled with motion

control instruction "MC_Power" (input parameter StopMode = 0), the axis is brought to a

standstill with this deceleration.

hello hugoD

Thanks for the answer.

I am looking for system bit which will stop my PTO  pulse train output from the s71200 to the drive , in order to stop it in interrupt .

do you know of  what is this bit ?

lio5

hello hugoD

Thanks for the answer.

I am looking for system bit which will stop my PTO  pulse train output from the s71200 to the drive , in order to stop it in interrupt .

do you know of  what is this bit ?

The S7-1200 does not have what you are looking for (..or it is kept secret from us users). We are forced to use the motion functions that are available.

Firmware V4.1.3. with motion control version 5 allows to use the motion control blocks in interrupts - it was a problem before. I however have not yet used the motion control inside the interrupts yet (for the versions mentioned) to be able to tell you more. Also I have not seen formal documents to expand on this information.

A work around is to have the motion control trigger a memory bit for the enable instead of the output bit which you would do normally. Then you can have your user program read the memory bit and trigger the output when you choose to. In this way you can have an interrupt force the output off regardless of the enable memory bit.

This method's negative - your (open loop) motion control will have wrong positioning information and you will need to do homing. If however you only do [relative] motions with some position trigger sensor, this method may not have a negative side. Alternatively use an external encoder to keep track of the movement.

Also see the following information in the FAQ...
{https://support.industry.siemens.com/cs/ww/en/view/109477583}

What are your thoughts on this matter?
w

Hello all

I will try  the all methods ,  and will inform  you .

regarding mc command at interrupt - from where this info came to you , because support center   , told me that it is not possible .

support center in china suggested me  to use the same mc block with the same DB , and bit for execution ( copy and paste ) in OB1  than in OB40 ,

thanks

hi

regarding the FAQ , stopping an axis with position accuracy after product identification .

since I am simotion fan , it is called there latch and registration with measuring input .

but  I am in doubt that it can work very fast .

I will check it

lio5

Hello all

I will try  the all methods ,  and will inform  you .

regarding mc command at interrupt - from where this info came to you , because support center   , told me that it is not possible .

support center in china suggested me  to use the same mc block with the same DB , and bit for execution ( copy and paste ) in OB1  than in OB40 ,

thanks

Hi.

I have had issue with an application that did not work right. It was with firmware V4.0.x. (motion V4) I have learnt, that there is a 10ms "scan cycle" for the motion control. That meant that up to 20ms delay to commands may apply. You will have to check what applies for motion V5.

As to your question - please review
{https://support.industry.siemens.com/cs/ww/en/view/107539750}

107539750

Update V4.1.3

CPU Firmware update V4.1.3 replaces CPU Firmware update V4.1.2.
S7-1200 FW V4.1.3 allows to execute motion function blocks in any OB.

 

Update V4.1.2

Notice:
To ensure proper operation of motion control programs with S7-1200 FW V4.1.2, it must execute all motion function blocks from OB 1 or from blocks that OB 1 calls. To use motion control without this restriction, use FW V4.1.1.
If it isn't used motion control in the project, it can used FW V4.1.2.

S7-1200 CPU Firmware update V4.1.2 improves CPU program execution time of some instructions through targeted instruction optimization.

 Highlighted: S7-1200 FW V4.1.3 allows to execute motion function blocks in any OB.

Please let us know the result.

Go well.
w