Safe state data, Device actions, Safe state data device actions – Rockwell Automation 1794-VHSC 1794 FLEX I/O Very High Speed Counter Module User Manual User Manual
Page 40: Input status word bits
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Rockwell Automation Publication 1794-UM010D-EN-E - July 2013
Communicate With Your Module
The adapter input status word bit descriptions are show in Table
Possible causes for an I/O module fault are:
• transmission errors on the FLEX I/O backplane
• a failed module
• a module removed from its terminal base
• an incorrect module inserted in a slot position
• an empty slot
• a non-discrete module in the slot
Safe State Data
The EtherNet/IP adapter does not provide storage for alternate module output
data during communication faults or processor idle state. This safe state data is
stored in the 1794-VHSC module and may be defined using configuration
software. Safe state data assures that a known output will be applied to the output
devices to maintain a previously designated safe operating condition during the
previously mentioned failure modes. This data is sent in the configuration block.
For more information, Table
1794-VHSC — High Speed Counter Module
Image Table Mapping on page 35
.
Device Actions
Device actions include:
• communication fault behavior
• idle state behavior
• input data behavior upon module removal
Input Status Word Bits
Bit Description
Bit
Explanation
I/O Module Fault
0
This bit is set (1) when an error is detected in slot position 0.
1
This bit is set (1) when an error is detected in slot position 1.
2
This bit is set (1) when an error is detected in slot position 2.
3
This bit is set (1) when an error is detected in slot position 3.
4
This bit is set (1) when an error is detected in slot position 4.
5
This bit is set (1) when an error is detected in slot position 5.
6
This bit is set (1) when an error is detected in slot position 6.
7
This bit is set (1) when an error is detected in slot position 7.
Node address
changed
8
This bit is set (1) when the node address switch setting is changed
since power up.
I/O state
9
Bit = 0 – idle
Bit = 1 – run
10…15
Not used – set to 0.