Rockwell Automation 1770,D17706.5.21 SMART TRANSMITTER TOOLKI - Manual (Page 33)

Chapter 3
Using The Smart Tranmsitter Toolkit
3-14
Example 3 (continued)
Rung 2:0
STT 1.00 Programming Example 3.
This example reads the primary variable from 2 HART field devices wired to 2
1770-HT1s.
When the STT subroutine is not enabled, set the STT subroutine trigger bit.
| Device 1 |
| Device 1 STT |
| STT enable trigger |
| N10:30 N10:30 |
+––––]/[–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––(L)–––––+
| 1 3 |
Rung 2:1
Call the STT subroutine unconditionally.
| STT |
| Subroutine |
| +JSR–––––––––––––––+ |
+–––––––––––––––––––––––––––––––––––––––––––––––––––––––––+JUMP TO SUBROUTINE+–+
| |Prog file number 5| |
| |Input par 10| |
| |Return par | |
| +––––––––––––––––––+ |