ProSoft Technology 3170-PDP - Manual (Page 21)

How Communication Takes Place and I/O Image Table Mapping 3170-PDP ♦ FLEX Platform
FLEX I/O™ PROFIBUS Adapter
ProSoft Technology, Inc. Page 21 of 152
August 23, 2007
ƒ node address changed – 1 bit
The adapter input status word bit descriptions are shown in the following table.
Bit Description Bit Explanation
I/O Module
Fault 8 This bit is set (1) when an error is detected in slot position 1.
9 This bit is set (1) when an error is detected in slot position 2.
10 This bit is set (1) when an error is detected in slot position 3.
11 This bit is set (1) when an error is detected in slot position 4.
12 This bit is set (1) when an error is detected in slot position 5.
13 This bit is set (1) when an error is detected in slot position 6.
14 This bit is set (1) when an error is detected in slot position 7.
15 This bit is set (1) when an error is detected in slot position 8.
Reserved 1 to 7 Reserved
Node Address
Changed 0 This bit is set (1) when the node address switch setting has been
changed since power up.
Possible causes for an I/O module fault are:
ƒ
transmission errors on the FLEX I/O backplane
ƒ a failed module
ƒ a module removed from its terminal base
ƒ incorrect module inserted in a slot position
ƒ the slot is empty
The node address changed bit is set when the node address switch setting has
been changed since power up. The new node address does not take affect until
the adapter has been powered down and then powered back up. Until this power
cycling occurs, the node address switches will not match the actual node
address.