Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 134)

Number of blocks
that make up total
segment.
Sample Programs
Appendix A
A-16
Rung 2:4
THE BTW WILL SEND THE PACKET LENGTH, BLOCK ID AND, WHEN PRIMARY, IT WILL ALSO
SEND DATA. WORD N30:182 IS A USER ADJUSTABLE VALUE THAT DETERMINES THE NUMBER
OF BLOCKS SENT. THIS VALUE SHOULD BE CHANGED AND THE DATA FILES N33 AND N34
ADJUSTED TO MATCH THE PACKET SIZE.
| PACKET |
| LENGTH |
| BTR 1 |BTW 1 STORED IN |
| EN |EN N30:182 |
| N30:0 N30:5 +MOV–––––––––––––––+ |
+––––]/[––––––––]/[–––––––––––––––––––––––––––+––––––––––+MOVE ++–+
| 15 15 | |Source N30:182|| |
| | | 3|| |
| | |Dest N32:1|| |
| | | 3|| |
| | +––––––––––––––––––+| |
| | BTW 1 | |
| | BID=1 | |
| | +MOV–––––––––––––––+| |
| +––––––––––+MOVE ++ |
| | |Source 1|| |
| | | || |
| | |Dest N32:2|| |
| | | 1|| |
| | +––––––––––––––––––+| |
| | BTW 1 | |
| | DATA | |
| | +COP–––––––––––––––+| |
| +––––––––––+COPY FILE ++ |
| | |Source #N34:0|| |
| | |Dest #N32:3|| |
| | |Length 62|| |
| | +––––––––––––––––––+| |
| | BTW 1 | |
| |+BTW––––––––––––––––––––+ | |
| ++BLOCK TRNSFR WRITE +–(EN)+ |
| |Rack 00| |
| |Group 0+–(DN) |
| |Module 0| |
| |Control Block N30:5+–(ER) |
| |Data file N32:1| |
| |Length 0| |
| |Continuous N| |
| +–––––––––––––––––––––––+ |