Pls help

sree46

Member
Join Date
Oct 2008
Location
Cochin
Posts
7
I'm working a project with AB RSLogix 5000. I need help in Analog I/O Card setting.Card type is AB 1794-1F4 I/A 1.1.
How to set the engineering unit High and low set points in this card.
:eek:
 
The newer Analog cards can be set by writing a number to an Output Address for that particular module. You really need to download the Allen Bradley analog I/O instruction manual, available at ab.com. Here is an example for a NI16 Analog Input Card. Notice that the basic method is to COPY a 16-bit word value to an address that is the addrress of the INPUTS, except it is written to as an OUTPUT.

1746-NI16 Analog Input Module "Output" Image - Channel Configuration
Class 1 Class 3


O:1.0 channel 0 configuration word bit-mapped field • •
O:1.1 channel 1 configuration word bit-mapped field • •
O:1.2 channel 2 configuration word bit-mapped field • •
O:1.3 channel 3 configuration word bit-mapped field • •
O:1.4 channel 4 configuration word bit-mapped field • •
O:1.5 channel 5 configuration word bit-mapped field • •
O:1.6 channel 6 configuration word bit-mapped field • •
O:1.7 channel 7 configuration word bit-mapped field • •
O:1.8 channel 8 configuration word bit-mapped field •
O:1.9 channel 9 configuration word bit-mapped field •
O:1.10 channel 10 configuration word bit-mapped field •
O:1.11 channel 11 configuration word bit-mapped field •
O:1.12 channel 12 configuration word bit-mapped field •
O:1.13 channel 13 configuration word bit-mapped field •
O:1.14 channel 14 configuration word bit-mapped field •
O:1.15 channel 15 configuration word bit-mapped field •
O:1.16 lower scale limit range 0 16-bit integer •
O:1.17 upper scale limit range 0 16-bit integer •
O:1.18 lower scale limit range 1 16-bit integer •
O:1.19 upper scale limit range 1 16-bit integer •
O:1.20 lower scale limit range 2 16-bit integer •
O:1.21 upper scale limit range 2 16-bit integer •
O:1.22 lower scale limit range 3 16-bit integer •
O:1.23 upper scale limit range 3 16-bit integer •

2-6 Quick Start for Experienced Users

7. Program the configuration. Reference

Do the programming necessary to establish the new configuration word setting in the previous step.
1. Create integer file N10. Integer file N10 should contain one element for each channel used.
(For this example we only need one, N10:0.)
2. Enter the configuration parameters from step 6 for channel 0 into integer N10:0.
3. Program an instruction in your ladder logic to copy the contents of N10:0 to output word O:1.0.

Chapter 7
(Application Examples)

Bit Definitions:
Bit 15​
Channel Enable 0 = channel disabled 1 = channel enabled

Bits 14-12​
Filter Frequency 000 = 6 Hz
001 = 10 Hz
010 = 20 Hz
011 = 40 Hz
100 = 60 Hz
101 = 80 Hz
110 = 100 Hz
111 = 250 Hz

Bits 11-9​
Calibration 000 = exit calibration
(normal run mode)
001 = enter calibration 011 = perform zero
calibration
101 = perform full scale
calibration

Bits 8-6​
Data Format Class 1 and Class 3 Class 3 Only
000 = engineering units
001 = scaled-for-PID
010 = proportional counts
011 = 1746-NI4 data format
100 = user-defined scaling 0
101 = user-defined scaling 1
110 = user-defined scaling 2
111 = user-defined scaling 3

Bits 5-4​
Input Type 000 = ±10V dc or ±20 mA
001 = 1-5V dc or 4-20 mA
010 = 0 to 5V dc or 0 to 1 mA
011 = 0 to 10V dc or 0 to 20 mA

Bits 3​
Not Used

Bit 2​
Class 1
Handshaking
0 = to reset status bit 6 1 = transmit channel configuration

Bits 1-0​
Class 1 Data or
Status
Configuration
00 = read data for channels 0 to 7
01 = read data for channels 8 to 15
10 = read status for channels 0 to 7

11 = read status for channels 8 to 15
 
Last edited:

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