Hello Stephan:

First of all I want to thank you for your quick response, I do appreciate.

I am going to give you the Electrical Characteristics of both switches (NO & NC) I could use, they are as follows:

- Max. current/voltage rating with resistive load: 100mA/50VDC

- Initial contact resistance: 50 mOhm max.

- Insulation resistance: 1 GOhm min. at 500VDC

- Dielectric strength: 1.000 Vrms

Both have the same Electrical Specs.. The hardware manual  of the TMCM-1110 says that the ports are 5V compatible and that the board has switching and linear regulators for supply of on board digital circuits, that makes me think that the max. signal when the switch is closed would be 5V. Thus, I believe the characteristics of the  switches might be OK. Do you agree?.

I was told that switches to be used with the reference switch connector had to be NC type. For the GPIO could I use either one?, because I'd rather use the NO type as they are better in quality and have the best feeling when pressed. 

I do not see how I can relate the state of the switches connected to the GPIO to the events the WAIT command considers, can you give me a hint?. Else, I'll have to use different programming technics that I believe will be much more energy consuming, like looping until the GIO command gets the desired value. Maybe you know the alternative and efficient way to solve this problem, if you do please let me know where I can find this solution.

I look forward to your quick response. Thanks very much.

Regards

Alberto González García

Hello Stephan,

Seen, I do not get any answer for my limit switches questions, I guess I'm asking incorrect questions. Let me say I am a Mechanical Engineer and not Electrical and I just do what I can. Sorry to bother.

I'll try to use the GPIO pins to make work my system. My system will have two motors for which I'll use 2 switches for each, when a switch is pressed I'd like the status of the corresponding input port to become 1 (high) and when released to become 0 (low), with those values I can make the motors move to the desired positions. My IDE program will also need one additional "Input" and one additional "Output" for each motor.

- Using this GPIO, the switches must be Normally Closed or they could be Normally Open?.

- If I want to set all PWMDs and PWMUs to "Input" what bit vector value must I use for Global Parameter 78, "0"?.

- My switches have two wires, I guess one must be connected to Ground, Pin 1 or Pin 2?, and the other wires to pins "3 & 5" (for motor 0) and "4 & 6" (for motor 1). Would that work?.

- For the additional digital "Inputs" and digital "Outputs" that I need for other processing purposes, could I use pins "7 & 8" for the Inputs and pins "11 & 13" for the "Outputs"?, must these pins also be connected to the ground pins "1 or 2"?.

- In the Firmware V1.03 Manual I read that the GIO command has two related commands SIO & WAIT, but how is it related to the WAIT command. I need to use the WAIT command to wait for a switch to be pressed or released, but using this GPIO pins, what would be the condition to meet so the execution of the program is interrupted?. How are these two commands related?.

I hope my questions today make more sense to you and I can have a quick answer, which it is really urgent for me. If they do not, please tell me what is wrong or make any question to me so I can try to clear things up and I may go ahead.

I will appreciate very much your response. Thanks very much.

Regards

Alberto González García