Input does not work in program

[Elya97]

Hi ALL. I come back with a weird problem

CPU: 1769-L32E CompacLogix
input : 1769-IQ16
output: 1769-OB16
Communication type : ETHERNET
program : RSLOGIX5000

i make a simple program in rslogix, and i donwload it in CPU, i go online , and i switch to RUN mode .
but... when i want to change Toggle bit or force on the input, Does not change, it still 0 and no led show up in addresses
but... the output work correctly

i don't know why . maybe someone can help .

[georg_demmler]

Hello,

some questions

- did you measure the voltage on your input channel - 24VDC whan signal is active
- did you take another input channel
- did you connect DCCOM1 and DCCOM2 with - (minus) of your power supply.

Thanks

[Elya97]

Hello,

some questions

- did you measure the voltage on your input channel - 24VDC whan signal is active
- did you take another input channel
- did you connect DCCOM1 and DCCOM2 with - (minus) of your power supply.

Thanks

Hello freind

I connect DCCOM1 and DCCOM2 with (minus) of power supply , and i give the input 24VDC, He worked , the leds turn on and the input in program (RSLOGIX5000) become 1 "green"

but the problem is , when i want to simulate my program in RSLOGIX5000 i always need to give the input 24VDC ?

what i want is to just toggle bit the input and see the input led turn on

because when i toggle bit in input nothing happen in program and the leds don't turn on


REPLY TO YOUR QUESTION :
- did you measure the voltage on your input channel - 24VDC whan signal is active : YES IT's works
- did you take another input channel : NO
- did you connect DCCOM1 and DCCOM2 with - (minus) of your power supply. : YES

[georg_demmler]

Hello,

now I understand - but it's not working.

Look the LED of the input channel need 24V DC power. I think it's not working. LED need power and there is power if the input is active.

Thanks

[h4rdw4re]

Hi ALL. I come back with a weird problem

CPU: 1769-L32E CompacLogix
input : 1769-IQ16
output: 1769-OB16
Communication type : ETHERNET
program : RSLOGIX5000

i make a simple program in rslogix, and i donwload it in CPU, i go online , and i switch to RUN mode .
but... when i want to change Toggle bit or force on the input, Does not change, it still 0 and no led show up in addresses
but... the output work correctly

i don't know why . maybe someone can help .

If I understood well you want to force input bits and turn on led on input card by that way?
Can you upload your program somewhere so we can see how did you write that routine?

[Elya97]

Hello,

now I understand - but it's not working.

Look the LED of the input channel need 24V DC power. I think it's not working. LED need power and there is power if the input is active.

Thanks

hello
Sorry for late reply
Yes georg, your right input need 24V for activation

thank you.

[Elya97]

Hi ALL. I come back with a weird problem

CPU: 1769-L32E CompacLogix
input : 1769-IQ16
output: 1769-OB16
Communication type : ETHERNET
program : RSLOGIX5000

i make a simple program in rslogix, and i donwload it in CPU, i go online , and i switch to RUN mode .
but... when i want to change Toggle bit or force on the input, Does not change, it still 0 and no led show up in addresses
but... the output work correctly

i don't know why . maybe someone can help .

If I understood well you want to force input bits and turn on led on input card by that way?
Can you upload your program somewhere so we can see how did you write that routine?

thank you for your reply . now i understand how it works,