Rockwell Automation 1797-IBN16 FLEX Ex NAMUR Input Module - Manual (Page 12)

12 FLEX Ex NAMUR Input Module
Publication 1797-5.7 - March 2010
Input Filter Times
Set the Fault Detect Switch
A switch, located on the backside of the module, lets you select the action of
the module when a fault (wire off or short circuit) is detected. Switch position
1 determines the action for channels 0 to 3, position 2 for channels 4 to 7,
position 3 for channels 8 to 11, and position 4 for channels 12 to 15.
Set the switch:
• OFF to disable fault detection for the selected channels.
• ON to enable fault detection for the selected channels.
Bits Description Maximum
Filter Time
02 01 00 Filter Times 00…11 (00…13)
05 04 03 Filter Times 12…15 (14…17)
0 0 0 Filter Time 0 (default) 1 ms
0 0 1 Filter Time 1 1 ms
0 1 0 Filter Time 2 2 ms
0 1 1 Filter Time 3 3 ms
1 0 0 Filter Time 4 5 ms
1 0 1 Filter Time 5 9 ms
1 1 0 Filter Time 6 17 ms
1 1 1 Filter Time 7 33 ms
Bits 00 … 02 also control the filter times of all 16 fault alarm bits of read word 1 when
module is in fault mode .
OFF
1 2 3 4
OFF
1 2 3 4