Rockwell Automation 1746-XXXX SLC 500 4-Channel Analog I/O Modules User Manual - Manual (Page 68)

Publication 1746-UM005B-EN-P - June 2004
6-6 Programming Examples
Using the Scale (SCL) Instruction
Rung 2:0
Check for below allowable range.
| Below |
| range flag |
| +LES–––––––––––––––+ B3 |
|–+LESS THAN +–––––––––––––––––––––––––––––––––––––––––––––––––( )–––––|
| |Source A I:1.1| 0 |
| | 0| |
| |Source B 14344| |
| | | |
| +––––––––––––––––––+ |
Rung 2:1
Check for above allowable range.
| Above |
| range flag |
| +GRT–––––––––––––––+ B3 |
|–+GREATER THAN +–––––––––––––––––––––––––––––––––––––––––––––––––( )–––––|
| |Source A I:1.1| 1 |
| | 0| |
| |Source B 16383| |
| | | |
| +––––––––––––––––––+ |
Rung 2:2
Turn on the below range alarm output when the analog
input is below the acceptible range.
| Below Below |
| range flag range alarm |
| B3 O:2 |
|––––] [––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––( )––|
| 0 0 |
Rung 2:3
Turn on the above range alarm output when the analog
input is above the acceptible range.
| Above Above |
| range flag range alarm |
| B3 O:2 |
|––––] [––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––( )––|
| 1 1 |
Rung 2:4
Scale analog input value and process the result only
when it is within acceptible range.
| Below |Above Scale |
| range flag |range flag analog input |
| B3 B3 +SCL–––––––––––––––+ |
|––––]/[––––––––]/[–––––––––––––––––––––––––––––––––––––––+SCALE +–|
| 0 1 |Source I:1.1| |
| (2:0) (2:1) | 0| |
| |Rate [/10000] 122| |
| | | |
| |Offset 100| |
| | | |
| |Dest N7:0| |
| | 0| |
| +––––––––––––––––––+ |
| |
Rung 2:5
| |
|–––––––––––––––––––––––––––––––––––––+END+––––––––––––––––––––––––––––––––––––|
| |