PCI-6601 for limit switches.

[kohokoho]

I have a PCI 6601 DIO/Counter and a CB-68LP connector board. I am using this to control two 110V motors which currently are controlled by 2 limit switches; one for a shutter motor and the other one for a azumith motor. Each limt switch allows each motor to turn in Forward and reverse directions.

(Please see the attached wiring diagram of the limit switches).

1. Shutter Motor:
For forward direction, lines 3,8,+V,are connected and 5,2,4 are connected.
for reverse Direction, lines 3,+V,2 are connected and 8,5,1 are connected.

2. Azimuth motor
For forward direction, lines 2,1,3 are connected and 4,5,6 are connected.
For Reverse direction, lines 1,2,4 are connected and 3,5,6 are connected

Could you please tell me what woul
d be the easiest way o program this in Labview? what will my block diagram look like? Any help will be appreciated since i am a very beginner in labview.

[Brooks B.]

Hello:

I am sorry but I need more information to provide a good response. The PCi-6601 board you have can output TTL 5 V or 0 V signals (but not drive much current) or be used for counter operations. According to your explanation and the JPG of the limit switches, it looks to me like you need switch or relay module to connect / disconnect different pins - is this correct? This board will not work as a relay. Please let me know exactly what you are trying to do in terms of what signals, what connections, etc and maybe I can help you out or suggest a more appropriate piece of hardware for you.

Sincerely,

Brooks B
Applications Engineer
National Instruments

[kohokoho]

Hello Brooks,

You are right. I would need a mechanical relay to make those connections. However, I would still like to control those relays using labview, and the connecting criteria of the lines remain the same. I am going to get the relays today, and i am wondering what blocks in labview I can use to send signals to the relay.

If you need more info to be able to help, please let me know. Thanks.

[Brooks B.]

Hello:

Please try out the example "Write 1 Pt to Dig Line (E).vi" which can be found using the LabVIEW example finder. You use the DIO VIs located on your DAQ palette.

Good Luck!

Sincerely,

Brooks B