The Industrial Raspberry Pi Forum

Hi.
I'm currently testing out fault scenarios regarding RevPi IO to make sure our software will correctly capture and present IO errors to the user.
I have some questions, hope you find time to answer:

1. The DI card (also DI part of DIO) has L (bit UV2) and LL (bit UV1) voltage detection on X2-I terminal. Why are these bit's not available for the DO part, hence the X2-O terminal?
2. OutputOpenLoadDetection for a DO card, as I understand enables monitoring of the loop load - and shall alert if loop is broken (open). Correct?
Then, following is stated:
In case of an error, the corresponding bits are set in the variable “Output Status” (Offset 2). As a result, all outputs are switched off and the status LED on the DIO/DO module flashes permanently red, as in all error cases.
So, is it really so that if one single loop on a DO card is broken(open) - all outputs are switched off?

Thanks,
Wbr Torbjørn

I did a test, and all outputs will deenergize if only one "open loop" is detected. I find this strange, as the other loops should not be affected?

Hi again, anyone able to answer these questions? Thanks.

Hi, we are currently working on this topic.
1) we are analyzing it
2) Yes, it is so, we have recreated the setup, at O_2 hangs a relay with 24V coil, at O_4 a lamp with 5Watt, O_2 is monitored for open loop. When we open O_2 the lamp at O_4 goes off.

Hi Both UV1 & UV2, are only available on DI and DIO, as these come from the input IC (MAX31913 - datasheet S10).