1. ©Contrinex 2013 - JDC PPT_LF_Fieldbus Fieldbus J.-D. Chatelain

2. Fieldbus Master RWM 2 11 22 33 Interface 1 RWM 1RWM 2RWM 3RWM 4 11 RWM 1 Interface 2 22 RWM 1 Interface 3 RWM 3RWM 4 RWM 2 33 Power supply

3. Fieldbus Master RWM 2 11 22 33 Interface 1 RWM 1RWM 2RWM 3RWM 4 11 RWM 1 Interface 2 22 RWM 1 Interface 3 RWM 3RWM 4 RWM 2 33 Power supply

4. Fieldbus Master RWM 2 11 22 33 Interface 1 RWM 1RWM 2RWM 3RWM 4 11 RWM 1 Interface 2 22 RWM 1 Interface 3 RWM 3RWM 4 RWM 2 33 Power supply

5. Fieldbus Master RWM 2 11 22 33 Interface 1 RWM 1RWM 2RWM 3RWM 4 11 RWM 1 Interface 2 22 RWM 1 Interface 3 RWM 3RWM 4 RWM 2 33 Power supply

6. ©Contrinex 2013 - JDC PPT_LF_Fieldbus Example: Read 4 words from address 10 J.-D. Chatelain

7. X X "R" "D" 0 10 4 Power supply Fieldbus New command X X X Lire 4 mots à partir de l'adresse 10 00100 RWM2 Read Tag EM4056 From address 10 4 words irrelevant RWM2 No interface error No RWM error irrelevant No data 01 Tags in front of RWM1 and RWM2Acknowledgment PHASE 1 Master RWM 1 0 2 0 0 0010110011 RWM 2RWM 3 RWM 4 Slave

8. Command completed X X "R" "D" 0 10 4 Power supply Fieldbus X X X Lire 4 mots à partir de l'adresse 10 00100 RWM 1 0 2 0 0 0010110011 RWM 2RWM 3 RWM 4 Slave 01 irrelevant Understood, end of communication irrelevant PHASE 1 Master

9. Number of words Power supply Fieldbus New command Data + protections Lire 4 mots à partir de l'adresse 10 0010001 "R" "P" RWM2 Reply irrelevant RWM2 No interface error No RWM error Data RWM 1RWM 2RWM 3 RWM 4 Slave 6 2 0 0 001011 DATA 2 (début) 00 Tags in front of RWM1 and RWM2Releasing of data 1 DATA 1 0 X X X 10 0 10 4 X X "R" "D" PHASE 2 Master

10. 61 0 10 4 X X Waiting next data Lire 4 mots à partir de l'adresse 10 001001 "R" "P" irrelevant Data RWM 1RWM 2RWM 3 RWM 4 Slave 001011 DATA 2 (beginning) DATA 1 10 1 DATA 2 (continuation) 2 0 0 DATA 3DATA 4 Protection 1 Protection 2 1 Releasing of data PHASE 2 Master Power supply Fieldbus

11. Power supply Fieldbus 0 10 4 X X Data are read Lire 4 mots à partir de l'adresse 10 001001 "R" "P" irrelevant RWM 1RWM 2RWM 3 RWM 4 Slave 00101110 1 DATA 2 (continuation) DATA 3DATA 4 Protection 2 1 Waiting an instruction Protection 1 PHASE 2 Master

12. Power supply Fieldbus 0 10 4 X X Waiting next data Lire 4 mots à partir de l'adresse 10 001001 "R" "P" irrelevant Data RWM 1RWM 2RWM 3 RWM 4 Slave 00101110 1 DATA 2 (suite) DATA 3DATA 4 Protection 4 1 Releasing of data Protection 3 Protection 1 Protection 4 irrelevant PHASE 2 Master

13. Power supply Fieldbus 0 10 4 X X Data are read Lire 4 mots à partir de l'adresse 10 001001 "R" "P" irrelevant RWM 1RWM 2RWM 3 RWM 4 Slave 00101110 1 DATA 4 Protection 4 1 Protection 3 Protection 1 Protection 4 irrelevant 1 All data have been sentWaiting an instruction PHASE 2 Master

14. Power supply Fieldbus 0 10 4 X X Command completed Lire 4 mots à partir de l'adresse 10 001001 "R" "P" irrelevant RWM 1RWM 2RWM 3 RWM 4 Slave 00101110 DATA 4 Protection 4 Protection 3 Protection 1 Protection 4 irrelevant 1 End of transaction 0 0 PHASE 2 Master

15. ©Contrinex 2013 - JDC PPT_LF_Fieldbus Fieldbus J.-D. Chatelain End of this chapter