40mpg
Member
Hello,
Can someone clarify and correct my understanding of two controllers sharing an I/O card.
I read through the Logix 5000 I/O document and as I understand it:
1. For an input card, as soon as the first controller establish an ownership, the second controller can only receive data from the input card if the first owner breaks its connection to the input card. However, if the second controller sets the input card to "Listen Only Data" mode, then both controllers can receive input data from the same input card. TLDR: two controllers can receive data from one input card.
2. For an output card, only one controller can be an owner, and any other controller configured to claim ownership of the output card will be rejected. If the second controller configures the shared output card as " Listen Only Data" it can receive status of the output channels.
TLDR: two controllers CANNOT command one output card what to do?
Can someone clarify and correct my understanding of two controllers sharing an I/O card.
I read through the Logix 5000 I/O document and as I understand it:
1. For an input card, as soon as the first controller establish an ownership, the second controller can only receive data from the input card if the first owner breaks its connection to the input card. However, if the second controller sets the input card to "Listen Only Data" mode, then both controllers can receive input data from the same input card. TLDR: two controllers can receive data from one input card.
2. For an output card, only one controller can be an owner, and any other controller configured to claim ownership of the output card will be rejected. If the second controller configures the shared output card as " Listen Only Data" it can receive status of the output channels.
TLDR: two controllers CANNOT command one output card what to do?