Input/Output Mapping; Set Input Filter Times - Allen-Bradley 1797-IBN16 Installation Instructions Manual

12 FLEX Ex NAMUR Input Module

Input/Output Mapping

Dec. Bit 15 14
Oct. Bit 17 16
Read 0 I15 I14
Read 1 F15 F14
Read 1 Input 15 Counter
Write 0
Where:I = Input
F = Fault Alarm for an individual channel
CF = Counter Fast - Filter time constant or bypass, depending on setting (when input 15 is in counter mode) -
CR = Counter Reset- Resets the counter value in read word 1 when input 15 is in counter mode.
FC = Fault mode or Counter mode - determines content of read word 1 (counter value of input 15, or

Set Input Filter Times

You can select the input filter time constant for each group of channels
(channels 00 to 11 or channels 12 to 15).
For example, to set a filter time constant of 5 ms for a dc input module, set
bits 05, 04, 03, 02, 01, and 00 as shown below.
15 14 13
Dec.
(Octal)
17 16 15
O:010
Publication
1797-IN007H-EN-P - August 2017
13 12 11 10
15 14 13 12
I13 I12 I11 I10
F13 F12 F11 F10
CF CR
0 = normal, 1 = fast
0 = normal, 1 = reset
fault data of individual channel). 0 = counter, 1 = fault data - wire off or short
circuit detect
12 11 10 09 08 07
14 13 12 11 10 07
09 08 07 06
11 10 07 06
I9 I8 I7 I6
F9 F8 F7 F6
FC
06 05 04 03 02 01 00
06 05 04 03 02 01 00
1 0 0 1
FT = 00 to 11
FT = 12 to 15
(00 to 13)
(14 to 17)
05 04 03 02
05 04 03 02
I5 I4 I3 I2
F5 F4 F3 F2
Input Filter - Ch Input/Alarm
12...15 Filter - Ch
0...11
=44 Octal
0 0
or 36 Decimal
40154
01 00
01 00
I1 I0
F1 F0