Спецификация протокола Profibus
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Page 501
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-WAIT-FOR-LLI-RES ASSREQ 13 OPEN
ASS_RES_PDU received (SDA.ind(serv_class = low))
\M-M AND (ACI = 0) AND (DTA-Run = FALSE)
=> ASS.con(R+) to LLI user
stop T1
ASS-WAIT-FOR-LLI-RES ASSREQ 33 OPEN
ASS_RES_PDU received (SDA.ind(serv_class = low))
\M-M AND (ACI = 0) AND (DTA-Run = TRUE)
=> ASS.con(R+) to LLI user
stop T1
continue DTA-Ack.(all started DTA-Ack.)
ASS-WAIT-FOR-LLI-RES ASSREQ 14 OPEN
ASS_RES_PDU received (CSRD.con(L_status = DL))
\cyc. M-S AND (DTA-Run = FALSE)
=> ASS.con(R+) to FMS
stop T1
ASS-WAIT-FOR-LLI-RES ASSREQ 34 OPEN
ASS_RES_PDU received (CSRD.con(L_status = DL))
\cyc. M-S AND (DTA-Run = TRUE)
=> ASS.con(R+) to FMS
stop T1
continue DTA-Ack.(all started DTA-Ack.)
ASS-WAIT-FOR-LLI-RES ASSREQ 15 OPEN
ASS_RES_PDU received (CSRD.con(L_status = DL))
\acyc. M-S with SI AND (ACI > 0) AND (DTA-Run = FALSE)
=> ASS.con(R+) to LLI user
stop T1, start S/E Timer
ASS-WAIT-FOR-LLI-RES ASSREQ 35 OPEN
ASS_RES_PDU received (CSRD.con(L_status = DL))
\acyc. M-S with SI AND (ACI > 0) AND (DTA-Run = TRUE)
=> ASS.con(R+) to LLI user
stop T1, start S/E Timer
continue DTA-Ack.(all started DTA-Ack.)
ASS-WAIT-FOR-LLI-RES ASSREQ 16 OPEN
ASS_RES_PDU received (CSRD.con(L_status = DL))
\acyc. M-S with SI AND (ACI = 0) AND (DTA-Run = FALSE)
=> ASS.con(R+) to LLI user
stop T1
ASS-WAIT-FOR-LLI-RES ASSREQ 36 OPEN
ASS_RES_PDU received (CSRD.con(L_status = DL))
\acyc. M-S with SI AND (ACI = 0) AND (DTA-Run = TRUE)
=> ASS.con(R+) to LLI user
stop T1
continue DTA-Ack.(all started DTA-Ack.)
Page 502
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-WAIT-FOR-LLI-RES ASSREQ 17 ASS-WAIT-FOR-LLI-RES
ASS_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (local address < remote address)
=> ignore
ASS-WAIT-FOR-LLI-RES ASSDTA 1 ASS-WAIT-FOR-LLI-RES
DTA_REQ_PDU received (SDA.ind(serv_class = high)/
CSRD.con(L_status = DH))
\(M-M OR M-S with SI) AND (RAC < max RAC)
=> start DTA Ack., RAC = RAC + 1, DTA-Run := TRUE
ASS-WAIT-FOR-LLI-RES ASSDTA 2 ASS-WAIT-FOR-LLI-RES
DTA_REQ_PDU received (SDA.ind(serv_class = low)/
CSRD.con(L_status = DL))
\M-M OR M-S
=> ignore
ASS-WAIT-FOR-LLI-RES ABDTA 1 ABT-SEND-PDU
1)
DTA_REQ_PDU received (SDA.ind(serv_class = high))
\M-M AND (RAC ≥ max RAC)
=> ABT.ind to LLI user <RC = ABT_RC6>
send ABT_REQ_PDU <RC = ABT_RC6> (SDA.req(low))
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES ABDTA 2 ABT-UPDATE
1)
DTA_REQ_PDU received
(CSRD.con(L_status = DH))
\(M-S with SI) AND (RAC ≥ max RAC)
=> ABT.ind to LLI user <RC = ABT_RC6>
send ABT_REQ_PDU <RC = ABT_RC6> (S_UPDATE.req)
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES ABDTA 3 ABT-UPDATE
1)
DTA_REQ_PDU received
(CSRD.con(L_status = DH))
\M-S without SI
=> ABT.ind to LLI user <RC = ABT_RC3>
send ABT_REQ_PDU <RC = ABT_RC3> (S_UPDATE.req)
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES ASSREQ 18 ASS-WAIT-FOR-LLI-RES
unknown, faulty or unallowed LLI PDU received
(SDA.ind(serv_class = low/high) /
CSRD.con (L_status = DL/DH, update_status = NO))
\M-M OR M-S
=> ignore
ASS-WAIT-FOR-LLI-RES AB 24 ABT-SEND-PDU
1)
T1 expired
\M-M
=> ABT.ind to LLI user <RC = ABT_RC10>
send ABT_REQ_PDU <RC = ABT_RC10> (SDA.req(low))
stop all timers, start T2, stop machines
1) see state diagram for connection release
Page 503
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-WAIT-FOR-LLI-RES AB 25 ABT-UPDATE
1)
error on receipt (CSRD.con(L_status = RR/NA/RDL/RDH/DH))
\M-S
=> ABT.ind to LLI user <RC = RR/NA/RDL/RDH/DH, AD = ABT_AD7>
send ABT_REQ_PDU <RC = RR/NA/RDL/RDH/DH>
(S_UPDATE.req)
stop all timers, start T2
ignore data if present, stop machines
ASS-WAIT-FOR-LLI-RES AB 26 ABT-UPDATE
1)
T1 expired
\M-S
=> ABT.ind to LLI user <RC = ABT_RC10>
send ABT_REQ_PDU <RC = ABT_RC10> (S_UPDATE.req)
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES AB 27 ABT-UPDATE
1)
error on receipt (CSRD.con(L_status = LR))
\M-S
=> ABT.ind to LLI user <RC = LR, AD = ABT_AD7>
LLI-Fault.ind <RC = LLI_FMA7_RC16, AD = LR>
send ABT_REQ_PDU <RC = LR> (S_UPDATE.req)
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES ASSREQ 20 ASS-WAIT-LOC-RES
2)
ASS_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (local address > remote address)
AND (LLI-LLI context test OK)
=> ABT.ind to LLI user <RC = ABT_RC21>
ASS.ind to LLI user
start T1, stop machines
ASS-WAIT-FOR-LLI-RES AB 28 ABT-SEND-PDU
1)
ASS_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (local address > remote address)
AND (LLI-LLI context test negative)
=> ABT.ind to LLI user <RC = ABT_RC21>
send ABT_REQ_PDU
<RC = ABT_RC1, AD = local LLI context> (SDA.req(low))
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES AB 29 CLOSED
ASS_NRS_PDU received (SDA.ind(serv_class = low))
\M-M AND D
=> ASS.con(R-) to LLI user
reset CREF
1) see state diagram for connection release
2) see connection establishment at the responder
Page 504
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-WAIT-FOR-LLI-RES AB 30 ABT-SAP-DEACTIVATE
1)
ASS_NRS_PDU received (SDA.ind(serv_class = low))
\M-M AND I
=> ASS.con(R-) to LLI user
stop all timers
start T2
SAP_DEACT.req, stop machines
ASS-WAIT-FOR-LLI-RES AB 31 CLOSED
ABT_REQ_PDU received (SDA.ind(serv_class = low/high))
\M-M AND D
=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>
reset CREF
ASS-WAIT-FOR-LLI-RES AB 32 ABT-SAP-DEACTIVATE
1)
ABT_REQ_PDU received (SDA.ind(serv_class = low/high))
\M-M AND I
=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>
stop all timers
start T2
SAP_DEACT.req, stop machines
ASS-WAIT-FOR-LLI-RES AB 33 ABT-POLL-LIST-OFF
1)
ASS_NRS_PDU received (CSRD.con(L_status = DL))
\M-S
=> ASS.con(R-) to LLI user
stop all timers, start T2, stop machines
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
ASS-WAIT-FOR-LLI-RES AB 55 ABT-UPDATE
1)
ASS_NRS_PDU or ASS_RES_PDU received (CSRD.con(L_status = DH))
\M-S
=> ABT.ind to LLI user <RC = ABT_RC8>
send ABT_REQ_PDU <RC = ABT_RC8> (S_UPDATE.req)
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES AB 34 ABT-POLL-LIST-OFF
1)
ABT_REQ_PDU received (CSRD.con(L_status = DL/DH))
\M-S
=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>
stop all timers, start T2, stop machines
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
ASS-WAIT-FOR-LLI-RES AB 35 ABT-POLL-LIST-OFF
1)
error on receipt ((CSRD.con(L_status = UE/RS/DS))
\M-S
=> ABT.ind to LLI user <RC = UE/RES/DS, AD = ABT_AD7>
stop all timers, start T2, stop machines
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
1) see state diagram for connection release
Page 505
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-WAIT-FOR-LLI-RES AB 36 ABT-POLL-LIST-OFF
1)
error on receipt (CSRD.con(L_status = LS/IV/OK/NO))
\M-S
=> ABT.ind to LLI user <RC = LS/IV/OK/NO, AD = ABT_AD7>
LLI-Fault.ind <RC = LLI_FMA7_RC16, AD = LS/IV/OK/NO>
stop all timers, start T2, stop machines
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
ASS-WAIT-FOR-LLI-RES AB 56 ABT-SEND-PDU
1)
ASS_REQ_PDU OR ASS_RES_PDU OR ASS_NRS_PDU received
(SDA.ind(serv_class = high))
\M-M
=> ABT.ind to LLI user <RC = ABT_RC8>
send ABT_REQ_PDU
<RC = ABT_RC8> (SDA.req(low))
stop all timers, start T2, stop machines
ASS-WAIT-FOR-LLI-RES ASSREQ 21 ASS-POLL-LIST-OFF
ASS_RES_PDU received (CSRD.con(L_status = DL))
\acyc. M-S without SI
=> deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
stop machines
ASS-POLL-LIST-OFF ASSREQ 22 OPEN
Poll List entry deactivated (ENTRY.con(OK))
\M-S AND (ACI > 0)
=> ASS.con(R+) to LLI user
poll entry enabled := false
stop T1, start S/RTimer
ASS-POLL-LIST-OFF ASSREQ 23 OPEN
Poll List entry deactivated (ENTRY.con(OK))
\M-S AND (ACI = 0)
=> ASS.con(R+) to LLI user
poll entry enabled := false, stop T1
ASS-POLL-LIST-OFF ASSREQ 24 ASS-POLL-LIST-OFF
unallowed FDL primitive
\M-S
=> LLI-Fault.ind <RC = LLI_FMA7_RC6, AD = code of the primitive>
ASS-POLL-LIST-OFF AB 37 ABT-POLL-LIST-OFF
1)
error in the deactivation of the Poll List entry
(ENTRY.con(LS/IV/NO))
\M-S
=> ABT.ind to LLI user <RC = LS/IV/NO, AD = ABT_AD3>
LLI-Fault.ind <RC = LLI_FMA7_RC5, AD = LS/IV/NO>
stop all timers, start T2
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
1) see state diagram for connection release
Page 506
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-POLL-LIST-OFF AB 38 ABT-POLL-LIST-OFF
1)
T1 expired
\M-S
=> ABT.ind to LLI user <RC = ABT_RC10>
LLI-Fault.ind <RC = LLI_FMA7_RC18>
stop all timers, start T2
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
ASS-REQ-SAP-ACTIVATE AB 39 CLOSED
T1 expired
\M-M
=> ABT.ind to LLI user <RC = ABT_RC10>
LLI-Fault.ind <RC = LLI_FMA7_RC18>
reset CREF
ASS-WAIT-FOR-LLI-RES AB 40 ABT-POLL-LIST-OFF
1)
unexpected FDL primitive
\M-S
=> ABT.ind to LLI user <RC = ABT_RC14, AD = code of the primitive>
LLI-Fault.ind <RC = LLI_FMA7_RC6, AD = code of the primitive>
stop all timers, start T2, stop machines
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
ASS-WAIT-FOR-LLI-RES AB 41 CLOSED
unexpected FDL primitive
\M-M AND D
=> ABT.ind to LLI user <RC = ABT_RC14, AD = code of the primitive>
LLI-Fault.ind <RC = LLI_FMA7_RC6, AD = code of the primitive>
stop all timers, stop machines
ASS-WAIT-FOR-LLI-RES AB 42 ABT-SAP-DEACTIVATE
1)
unexpected FDL primitive
\M-M AND I
=> ABT.ind to LLI user <RC = ABT_RC14, AD = code of the primitive>
LLI-Fault.ind <RC = LLI_FMA7_RC6, AD = code of the primitive>
stop all timers, start T2, stop machines
SAP_DEACT.req
ASS-REQ-WAIT-FOR-CON AB 43 ABT-POLL-LIST-OFF
1)
error on sending the ASS_REQ_PDU
(CSRD.con(L_status = NR, update_status = NO))
\M-S
=> ABT.ind to LLI user <RC = ABT_RC25>
LLI-Fault.ind <RC = LLI_FMA7_RC24, AD = NR>
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
stop all timers, start T2
1) see state diagram for connection release
Page 507
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
ASS-WAIT-FOR-LLI-RES AB 44 ABT-POLL-LIST-OFF
1)
error on receipt
CSRD.con(L_status = NR, update_status = NO))
\M-S
=> ABT.ind to LLI user <RC = ABT_RC25>
LLI-Fault.ind <RC = LLI_FMA7_RC24, AD = NR>
stop all timers, start T2, stop machines
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
ASS-REQ-SAP-ACTIVATE AB 45 CLOSED
unallowed FMA1/2 primitive
\M-M
=> ABT.ind to LLI user <RC = ABT_RC26>
LLI-Fault.ind <RC = LLI_FMA7_RC22>
reset CREF
1) see state diagram for connection release
Page 508
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
6.7.2.2 State Diagram for Connection Establishment at the Responder
CLOSED
O
O
O
O
ASS.res (+) from LLI user
ASS-
REPLY-UPDATE
ASS.res (+) from LLI user
send ASS_RES_PDU
D
ASS-RES-
SAP-DEACTIVATE
O
LLI start routine
ASS-RES-
SAP-ACTIVATE
reset CREF
UPDATE.con (OK)
ASS-
WAIT-LOC-RES
3: ASS.res (-)
5: T1 expired
4: ABT.req from LLI user
2: unallowed LLI primitives
3:send ASS_NRS_PDU
1,2,4,5:send ABT_REQ_PDU
1,2,5:ABT.ind to LLI user
ASS.ind to LLI user
2
ABT_REQ_PDU
send
LLI Fault.ind
LLI Fault.ind
2
2
ASS_REQ_PDU received
(SRD.ind / SDA.ind)
and LLI-LLI context
test negative
ABT_REQ_PDU
send
D
1
D
ASS_REQ_PDU received (SDA.ind / SRD.ind)
LLI-LLI context test positive
2: unallowed FDL primitives
1: ignore PDU
2: LLI Fault.ind
1...3: reset CREF
1: ABT_REQ_PDU
(SDA.ind/SRD.ind)
LLI-LLI context
test negative
(R)SAP_ACT.con(OK)
2
ABT.ind to LLI user, LLI Fault.ind
send ABT_REQ_PDU
(UPDATE.req(low))
ASS-
SEND-RES-PDU
UPDATE.con(LR)
ABT.ind to LLI user, LLI Fault.ind
ASS.ind to LLI user, start T1
All Transitions of the Master-Slave Connections
SAP_DEACT.con (OK)
2
ABT.ind an LLI-User
1,2,3:ABT_REQ_PDU senden
1: LLI-Fault.ind
3: SDA.con(RR/NA)
1: T1 expired/SDA.con(LR)
3
1,2: ABT.ind to LLI user
1: LLI Fault.ind
2: ABT_REQ_PDU
(SDA.ind/SRD.ind)
(SRD.ind/SDA.ind)
2: any LLI PDU except Abort
(SRD.ind/SDA.ind)
1: any LLI PDU except Abort
SAP_ACT.req<Rem_add>
ASS.ind to LLI user
start T1
UPDATE.con(LS/IV)
O
3
ABT.ind to LLI user, LLI Fault.ind
UPDATE.con(LS/IV)
1: unallowed
FDL primitives/
SRD.ind(no data,
update_status = NO)
T1 expired/
SAP_DEACT.con (NO/IV)/
unallowed FMA1/2 primitive
(R)SAP_ACT.con(NO/IV)/
T1 expired/
unallowed FMA1/2 primitive
1,2,3: stop T1
1: start S/ETimer
ASS_RES_PDU sent
(SRD.ind (no data, update_status=LO)
or SDA.con(OK))
1: ACI > 0
2: ACI = 0 acyc.
3: M-S CN for cycl. Data Transfer
3
2: ABT_REQ_PDU/SDA.con(UE/RS/DS)
update_status = N O)
1: unallowed FDL primitives /
SDA.con(LS/IV) / SRD .ind (no data)
1,2: ABT.ind to LLI user
1: LLI Fault.ind
OPEN
ASS_REQ_PDU received
(SDA.ind)
start T1, SAP_DEACT.req
(R)SAP_ACT.con (OK) and
LLI-LLI context test positive
1,2: send ABT_REQ_PDU
2
1: ASS_RES / ASS_NRS / DTC / DTA /
Idle PDUreceived (SRD.ind / SDA.ind)
2: ASS_REQ_PDU received
(SRD.ind / SDA.ind (high))
are only valid for the Slave. The Transitions with
the numbers 2 and 3 are continued in the Figure
"Connection Release".
The Transition with the number 1 exits the Figure
"Connection Establishment at the Requester".
ASS conflict case
ASS_REQ_PDU received
LLI-LLI context test positive
send ASS_RES_PDU
(SDA.req(low))
3: any LLI primitive
3: ABT.ind
or unknown or faulty PDU
or unknown or faulty PDU
ASS_REQ_PDU received (SDA.ind)
start T1, RSAP_DEACT.req<Rem _add>
O
ASS-
WAIT-FOR-UPDATE-CON
1: UPDATE.con(OK)
2: UPDATE.con(LS/LR/IV)
3: T2 expired
any FDL primitive
exept UPDATE.con
1,2: ignore UPDATE.con
2,3: LLI Fault.ind
ignore FDL primitive
1: UPDATE.con(OK)
2: UPDATE.con(LS/LR/IV)
3: T2 expired
1,2: ignore UPDATE.con
2,3: LLI Fault.ind
D
O
1...4: ABT.ind
stop all Timers, start T2
1,2,4: LLI Fault.ind
1: T1 expired
2: unexpec. FDL prim.
3: ABT_REQ_PDU rec.
4: SRD.ind
ABT-
WAIT-FOR-UPDATE-CON
any LLI PDU exept Abort
or unknown or faulty PDU rec.
stop all Timers, start T2
UPDATE.con(LS/IV)
ABT.ind to LLI user, LLI Fault.ind
ignore UPDATE.con
UPDATE.con(LS/IV)
ABT.ind to LLI user, LLI Fault.ind
ignore UPDATE.con
O
1: UPDATE.con(OK)
2: UPDATE.con(LR)
3: T2 expired
1,2: ignore UPDATE.con
1,2,3: ABT.ind to LLI user
2,3: LLI Fault.ind
send ABT_REQ_PDU
ignore FDL primitive
any FDL primitive
exept UPDATE.con
(no data, upd_st=LO)
Figure 110. State Diagram for Connection Establishment at the Responder
Page 509
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Description of State Transitions for Connection Establishment at the Responder
All state transitions of the master-slave connections are only valid for the
slave.
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
CLOSED AB 1 CLOSED
ABT_REQ_PDU received (SDA.ind(serv_class = low/high)/
SRD.ind(serv_class = low/high))
\M-M OR M-S
=> ignore PDU
reset CREF
CLOSED AB 2 CLOSED
unallowed FDL primitive
\M-M OR M-S
=> LLI-Fault.ind <RC = LLI_FMA7_RC6, AD = code of the primitive>
reset CREF
CLOSED AB 3 ABT-SEND-PDU
1)
ASS_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (LLI-LLI context test negative) AND D
=> send ABT_REQ_PDU <RC = ABT_RC1, AD = local LLI context>
stop all timers, start T2
CLOSED AB 4 ABT-UPDATE
1)
ASS_REQ_PDU received (SRD.ind(serv_class = low))
\M-S AND (LLI-LLI context test negative) AND D
=> send ABT_REQ_PDU <RC=ABT_RC1, AD=loc. LLI context>
(UPDATE.req(low))
stop all timers, start T2
CLOSED AB 5 ABT-SEND-PDU
1)
ASS_RES_PDU received (SDA.ind(serv_class = low/high))
OR ASS_NRS_PDU received (SDA.ind(serv_class = low/high))
OR DTC_REQ_PDU received (SDA.ind(serv_class = low/high))
OR DTC_RES_PDU received (SDA.ind(serv_class = low/high))
OR DTA_REQ_PDU received (SDA.ind(serv_class = low/high))
OR DTA_ACK_PDU received (SDA.ind(serv_class = low/high))
OR IDLE_REQ_PDU received (SDA.ind(serv_class = low/high)
\M-M AND D
=> send ABT_REQ_PDU <RC = ABT_RC2> (SDA.req(low))
stop all timers, start T2
CLOSED AB 61 ABT-SEND-PDU
1)
ASS_REQ_PDU received (SDA.ind(serv_class = high))
\M-M AND D
=> send ABT_REQ_PDU <RC = ABT_RC8> (SDA.req(low))
stop all timers, start T2
1) see state diagram for connection release
Page 510
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Connection Establishment at the Requester
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
CLOSED AB 6 ABT-UPDATE
1)
ASS_RES_PDU received (SRD.ind(serv_class = low/high))
OR ASS_NRS_PDU received (SRD.ind(serv_class = low/high))
OR DTC_REQ_PDU received (SRD.ind(serv_class = low/high))
OR DTC_RES_PDU received (SRD.ind(serv_class = low/high))
OR DTA_REQ_PDU received (SRD.ind(serv_class = low/high))
OR DTA_ACK_PDU received (SRD.ind(serv_class = low/high))
OR IDLE_REQ_PDU received (SRD.ind(serv_class = low/high))
\M-S
=> send ABT_REQ_PDU <RC = ABT_RC2> (UPDATE.req(low))
stop all timers, start T2
CLOSED AB 62 ABT-UPDATE
1)
ASS_REQ_PDU received (SRD.ind(serv_class = high))
\M-S
=> send ABT_REQ_PDU <RC = ABT_RC8> (UPDATE.req(low))
stop all timers, start T2
CLOSED AB 63 ABT-SEND-PDU
1)
ASS_RES_PDU received (SDA.ind(serv_class = low/high))
OR ASS_NRS_PDU received (SRD.ind(serv_class = low/high))
OR DTC_REQ_PDU received (SDA.ind(serv_class = low/high))
OR DTC_RES_PDU received (SDA.ind(serv_class = low/high))
OR DTA_REQ_PDU received (SDA.ind(serv_class = low/high))
OR DTA_ACK_PDU received (SDA.ind(serv_class = low/high))
OR IDLE_REQ_PDU received (SDA.ind(serv_class = low/high)
\M-M AND O
=> send ABT_REQ_PDU <RC = ABT_RC2> (SDA.req(low))
use Layer 2 address out of the received PDU
stop all timers, start T2
CLOSED AB 64 ABT-SEND-PDU
1)
ASS_REQ_PDU received (SDA.ind(serv_class = high))
\M-M AND O
=> send ABT_REQ_PDU <RC = ABT_RC8> (SDA.req(low))
use Layer 2 address out of the received PDU
stop all timers, start T2
CLOSED AB 69 CLOSED
Any unallowed primitive from LLI user
\(M-S AND Slave) OR (MM AND O)
=> ABT.ind to LLI user <RC = ABT_RC18, AD = Code of the primitive>
reset CREF
CLOSED ASSRES 1 ASS-WAIT-LOC-RES
ASS_REQ_PDU received (SDA.ind(serv_class = low)/
SRD.ind(serv_class = low))
\(M-M OR M-S) AND (LLI-LLI context test positive)
AND D
=> ASS.ind to LLI user
start T1
1) see state diagram for connection release