Bit Drives of the Joint

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1.) Start-Stop

This is a motor that has only got one speed and can only run into one direction. Naturally it cannot be used with one limiting meaningfully.

 

2.) 4/2-way valve

This motor never stands still. Either it will run forward (if the output is ‘1’) or backward (if the output is ‘0’). In most cases it will be a good idea to use it with limitation of the turning angle.

 

3.) For- Backward

This motor will run forward if the first bit is set and backward if the second bit is set, but always with the same speed. If no bit is set it will slow down with the stop slope. It can be used with as well as without limitation.

 

4.) Slow / Fast

This motor just runs forward but with two speeds. If the ‘fast’ bit is set it will run fast, independent of the stage of the ‘slow’ bit. (Remark: This is possibly different to your real connection: there it might be that the motor only runs fast if both outputs are set.)

A specification of limits is not useful because you will never get back the joint.

 

5.) For / Back / Fast

For the control of this motor you need three bits. The first and the second one adjust the direction of speed. With the third one you adjust the speed. If the ‘fast’ bit is ‘0’ the joint will turn slowly, is it ‘1’ the joint will turn correspondingly fast. This drive can be used with as well as without limitation.

 

6.) For / Back  /  Slow / Fast

This drive is nearly the same as the previous one (No.5), but here the small speed has to be set explicitly as well.

 

7.) Slow For / Fast For / Slow Back / Fast Back

This drive corresponds also to the drives 5.) and 6.) fundamentally. It needs 4 control bits whose meaning is self-explanatory. Take care that only one of the bits is active. There are mainly frequently converters which are set like this, although this could also be realized with conventional circuit engineering, but that is quite unusual in connection with a PLC.

 

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