Rockwell Automation 1770,D17706.5.21 SMART TRANSMITTER TOOLKI - Manual (Page 27)

Chapter 3
Using The Smart Tranmsitter Toolkit
3-8
Example 1 (continued)
Rung 2:0
STT 1.00 Programming Example 1.
This example reads the primary variable from 1 HART field device wired to 1
1770-HT1.
When the STT subroutine is not enabled, set the STT subroutine trigger bit.
| STT enable STT 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 | |
| +––––––––––––––––––+ |
Rung 2:2
Only process when the STT subroutine is done. If the Hart command is 0, copy
the Hart address to the input area and request Hart command 1. If the device
does not respond (error 33), try getting a new Hart address for the device by
requesting Hart command 0.
| Hart Hart |
| STT Done Command # Address |
| N10:30 +EQU–––––––––––––––+ +COP–––––––––––––––+ |
+––––] [––––––––––––––––––––––––––++EQUAL +++COPY FILE +++–+
| 2 ||Source A N10:5|||Source #N10:40||| |
| || 1|||Dest #N10:6||| |
| ||Source B 0|||Length 3||| |
| || ||+––––––––––––––––––+|| |
| |+––––––––––––––––––+| Hart || |
| | | Command # || |
| | |+MOV–––––––––––––––+|| |
| | ++MOVE ++| |
| | |Source 1| | |
| | | | | |
| | |Dest N10:5| | |
| | | 1| | |
| | +––––––––––––––––––+ | |
| | Device Not Hart | |
| | Responding Command # | |
| |+EQU–––––––––––––––+ +MOV–––––––––––––––+| |
| ++EQUAL +––+MOVE ++ |
| |Source A N10:33| |Source 0| |
| | 0| | | |
| |Source B 33| |Dest N10:5| |
| | | | 1| |
| +––––––––––––––––––+ +––––––––––––––––––+ |
Rung 2:3
| |
+––––––––––––––––––––––––––––––––[END OF FILE]–––––––––––––––––––––––––––––––––+
| |