Configuring your module – Rockwell Automation 1794-OB8EPXT, 1794-IB16XT, 1794-OB16PXT, 1794-IB10XOB6XT FLEX XT I/O Digital DC Input/Output Modules User Manual

Page 4

Publication 1794-IN124A-EN-P - January 2009

1794-TB3 and -TB3S Terminal Base Wiring for the 1794-IB10XOB6XT

2 and 3-Wire Input Wiring for 1794-IB16XT, -IB10XOB6XT

Configuring Your Module

You configure your output/input module by setting bits in the
configuration word.

Configuration

Setting the Input Filter Time (1794-IB16XT, -IB10XOB6XT)

To set the input filter time, set the associated bits in the output image table
(complementary word) for the module .

As an example for 1794-IB16XT, to increase the off-to-on filter time to 4 ms
for all inputs at address rack 1, module group 0, set bits and program as
shown below .

For 1794-IB10XOB6XT, increase the off-to-on filter time to 8 ms for all
inputs at address rack 1, module group 0, in configuration word 3, by
setting bits as shown below.

Refer to the Input Filter time chart below for other bit settings.

Input Filter Time (1794-IB16XT)

Input Filter Time (1794-IB10XOB6XT)

Dec.

Oct.

1794-OB8EPXT

Read F7

Reserved (see note)

Write Not

used

O1 O0

Write

1794-OB16PXT

Read Not

used

Write O15 O14 O13 O12 O11 O10 O9

O1 O0

Write
1794-OB
32P only

O
31

O
30

O
29

O
28

O
27

O
26

O
25

O
24

O
23

O
22

O
21

O
20

O
19

O
18

O
17

O
16

1794-IB16XT

I15

I14

I13

I12

I11

I10

C = Counter Input value of input 15

Write 1 Not used CF

Not used

Input Filter
12-15

Input Filter
0-11

1794-IB10XOB6XT

Read 1 Not used

I1 I0

Write 2 Not used

O5 O4 O3 O2 O1 0O

Write 3 Not used

Not used

Where: O = Output - O0 corresponds to output 0, O1 corresponds to output 1

F = Overload fault bits - 1 = fault present; 0 = no fault

FR = Fault reset bit - 1 = reset output; 0 = no change

I = Input

C = Counter value for input 15

CR = Counter reset

CF = Counter fast - where 1 = fast input (raw data), 0 = standard input filtered data

FT = Input Filter Time for input channels

1794-OB16PXT uses outputs 0-3

NOTE: C, CR and CF not available when used with any series 1794-ASB or 1794-ASB2 remote I/O
adapter modules.
NOTE: The unused lower byte in read word 1 floats during operation. Do not use this byte for fault
status.

See Programming below.

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Inputs

Commons

(1794-TB3 shown)

-V (Supply Common) = Terminals B-16 and B-33
+V (Supply +Voltage In) = Terminals C-34 and C-51

-V

Voltage
In +V

Voltage
Out +V

Voltage

(Use B-33 and C-51 for daisy-chaining to next terminal base unit)

Common

-V

Common

Outputs

= Sink input

= Common

= +V dc

0-15

16-33

34-51

2-Wire Device

(Sourcing Output)

3-Wire Device

(Sourcing Output)

Bits

Description - Filter Time

Filter Time

Inputs 0 thru 11

1794-IB16XT

Inputs 12 thru 15

Filter time 0 (default)

0.25 ms

Filter time 1

0.5 ms

Filter time 2

1 ms

Filter time 3

2 ms

Filter time 4

4 ms

Filter time 5

8 ms

Filter time 6

16 ms

Filter time 7

32 ms

Bits

Description

Filter Time for Inputs

Off to On/On to Off

Filter Time 0

0.25 ms

Filter Time 1

0.5 ms

Filter Time 2

1.0 ms

Filter Time 3

2.0 ms

Filter Time 4

4.0 ms

Filter Time 5

8.0 ms

Filter Time 6

16.0 ms

Filter Time 7

32.0 ms

15 14 13 12 11 10 9

Dec.

O:010

FT = 12-15

1794-IB16XT

FT = 0-11

44706

15 14 13 12 11 10 9

Dec.

O:010

1794-IB10XOB16XT

FT = 0-9

44708

Fill File
Source
Destination #0:010
Length 1

FLL

1794-IB16XT

I:000

Write filter time on system startup.

Write FT on
complement of
input module.

= 44 Octal or
36

Decimal

44707

Fill File
Source
Destination #0:010
Length 1

FLL

1794-IB10XOB16XT

I:000

Write filter time on system startup.

Write FT on
complement of
input module.

= 5 Octal or
5

Decimal

44709