Спецификация протокола Profibus
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Page 531
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
6.7.3 Data Transfer
6.7.3.1 State Diagram for Open at the Master
OPEN
DTC5
DTA6
IT3
DT1
DTC1 to DTC4, DTC8 to DTC11,
DTC14 to DTC16, DTA1to DTA5,
DTA9 to DTA13, DTA16 to DTA20,
IT1, IT2, IT5, IT6, IT8, DT2, DTCC1
DTC6, DTC7
DTA7, DTA8
IT4
DTC12, DTC13
DTA14, DTA15
IT7
OP-
POLL-LIST-OFF
2
AB12
AB54
OP-
POLL-LIST-ON
3
AB11
AB53
2
AB1 to AB10,
AB16 to AB29,
AB34, AB35,
AB37, AB42 to AB50,
AB 52
3
AB13 to AB15
AB30 to AB33
AB36, AB38 to AB41,
AB51
The State Transitions with the numbers
2 and 3 are continued in the Figure
"Connection Release".
Figure 112. State Diagram for Open at the Master
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Description of State Transitions for Open at the Master
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN DTC 1 OPEN
DTC.req from LLI user
\(M-M OR acyc. M-S with SI) AND (SCC < max SCC) AND (ACI = 0)
=> start DTC Req.(invoke ID)
SCC := SCC + 1
OPEN DTC 2 OPEN
DTC.req from LLI user
\( M-M OR acyc. M-S with SI) AND (SCC < max SCC)
AND (ACI > 0)
=> start DTC Req.(invoke ID)
SCC := SCC + 1
start STimer
OPEN AB 1 ABT-SEND-PDU
1)
DTC.req from LLI user
\M-M AND (SCC ≥ max SCC)
=> ABT.ind to LLI user <RC = ABT_RC23>
send ABT_REQ_PDU <RC = ABT_RC9> (SDA.req(low))
stop all timers, start T2, stop machines
OPEN AB 2 ABT-UPDATE
1)
DTC.req from LLI user
\acyc. M-S AND (SCC ≥ max SCC)
=> ABT.ind to LLI user <RC = ABT_RC23>
send ABT_REQ_PDU <RC = ABT_RC9> (S_UPDATE.req)
stop all timers, start T2, stop machines
OPEN DTC 3 OPEN
DTC.req from LLI user
\acyc. M-S without SI AND (poll entry enabled = true)
AND (SCC < max SCC) AND (ACI = 0)
=> start DTC Req.(invoke ID)
SCC := SCC + 1
OPEN DTC 4 OPEN
DTC.req from LLI user
\acyc. M-S without SI AND (poll entry enabled = true)
AND (SCC < max SCC) AND (ACI > 0)
=> start DTC Req.(invoke ID)
SCC := SCC + 1
start STimer
1) see state diagram for connection release
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN DTC 5 OP-POLL-LIST-ON
DTC.req from LLI user
\acyc. M-S without SI AND (poll entry enabled = false)
AND (SCC < max SCC)
=> activate Poll List entry
(ENTRY.req(remote address/remote LSAP/unlock))
SCC := SCC + 1
Start T1
OP-POLL-LIST-ON DTC 6 OPEN
Poll List entry activated (ENTRY.con(OK))
\acyc. M-S without SI AND (SCC = 1) AND (ACI = 0)
=> start DTC Req.(invoke ID)
poll entry enabled := true
Stop T1
OP-POLL-LIST-ON DTC 7 OPEN
Poll List entry activated (ENTRY.con(OK))
\acyc. M-S without SI AND (SCC = 1) AND (ACI > 0)
=> start DTC Req.(invoke ID)
start STimer
poll entry enabled := true
Stop T1
OPEN DTC 8 OPEN
DTC Req. finished
\( M-M OR acyc. M-S with SI) AND (ACI = 0)
=> SCC := SCC - 1
OPEN DTC 9 OPEN
DTC Req. finished
\( M-M OR acyc. M-S with SI) AND (ACI > 0)
=> SCC := SCC - 1
start RTimer
OPEN DTC 10 OPEN
DTC Req. finished
\acyc. M-S without SI AND ((SCC - 1) + SAC > 0) AND (ACI = 0)
=> SCC := SCC - 1
OPEN DTC 11 OPEN
DTC Req. finished
\acyc. M-S without SI AND ((SCC - 1) + SAC > 0 OR
IMA = true) AND (ACI > 0)
=> SCC := SCC - 1
start RTimer
OPEN DTC 12 OP-POLL-LIST-OFF
DTC Req. finished
\acyc. M-S without SI AND ((SCC - 1) + SAC = 0) AND (ACI = 0)
=> SCC := SCC - 1
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
Start T2
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Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN DTC 13 OP-POLL-LIST-OFF
DTC Req. finished
\acyc. M-S without SI AND ((SCC - 1) + SAC = 0 AND
IMA = false) AND (ACI > 0)
=> SCC := SCC - 1
start RTimer
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
Start T2
OPEN DTA 1 OPEN
DTA.req from LLI user
\( M-M OR acyc. M-S with SI) AND (SAC < max SAC)
AND (ACI = 0)
=> start DTA Req.
SAC := SAC + 1
OPEN DTA 2 OPEN
DTA.req from LLI user
\( M-M OR acyc. M-S with SI) AND (SAC < max SAC)
AND (ACI > 0)
=> start DTA Req.
SAC := SAC + 1
start STimer
OPEN DTA 3 OPEN
DTA.req from LLI user
\(M-M OR M-S) AND (SAC ≥ max SAC)
=> ignore DTA.req
OPEN DTA 4 OPEN
DTA.req from LLI user
\acyc. M-S without SI AND (poll entry enabled = true)
AND (SAC < max SAC) AND (ACI = 0)
=> start DTA Req.
SAC := SAC + 1
OPEN DTA 5 OPEN
DTA.req from LLI user
\acyc. M-S without SI AND (poll entry enabled = true)
AND (SAC < max SAC) AND (ACI > 0)
=> start DTA Req.
SAC := SAC + 1
start STimer
OPEN DTA 6 OP-POLL-LIST-ON
DTA.req from LLI user
\acyc. M-S without SI AND (poll entry enabled = false)
AND (SAC < max SAC)
=> activate Poll List entry
(ENTRY.req(remote address/remote LSAP/unlock))
SAC := SAC + 1
Start T1
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OP-POLL-LIST-ON DTA 7 OPEN
Poll List entry activated (ENTRY.con(OK))
\acyc. M-S without SI AND (SAC = 1) AND (ACI = 0)
=> start DTA Req.
poll entry enabled := true
Stop T1
OP-POLL-LIST-ON DTA 8 OPEN
Poll List entry activated (ENTRY.con(OK))
\acyc. M-S without SI AND (SAC = 1) AND (ACI > 0)
=> start DTA Req.
start STimer
poll entry enabled := true
Stop T1
OPEN DTA 9 OPEN
DTA Req. finished
\M-M OR M-S
OPEN DTA 10 OPEN
DTA_ACK_PDU received
(SDA.ind(serv_class = low/high)/(C)SRD.con(L_status =
DL/DH)/SRD.con(DL/DH))
\( M-M OR acyc. M-S with SI) AND (SAC > 0) AND (ACI = 0)
=> SAC := SAC - 1
OPEN DTA 11 OPEN
DTA_ACK_PDU received
(SDA.ind(serv_class = low/high)/(C)SRD.con(L_status =
DL/DH)/SRD.con(DL/DH))
\( M-M OR acyc. M-S with SI) AND (SAC > 0) AND (ACI > 0)
=> start RTimer
SAC := SAC - 1
OPEN DTA 12 OPEN
DTA_ACK_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/DH))
\acyc. M-S without SI AND (SAC > 0)
AND (SCC + (SAC - 1) > 0) AND (ACI = 0)
=> SAC = SAC - 1
OPEN DTA 13 OPEN
DTA_ACK_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/DH))
\acyc. M-S without SI AND (SAC > 0)
AND (SCC + (SAC - 1) > 0 OR IMA = true) AND (ACI > 0)
=> start RTimer
SAC = SAC - 1
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Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN DTA 14 OP-POLL-LIST-OFF
DTA_ACK_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/DH))
\acyc. M-S without SI AND (SAC > 0)
AND (SCC + (SAC - 1) = 0) AND (ACI = 0)
=> SAC := SAC - 1
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
Start T2
OPEN DTA 15 OP-POLL-LIST-OFF
DTA_ACK_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/DH))
\acyc. M-S without SI AND (SAC > 0)
AND (SCC + (SAC - 1) = 0 AND IMA = false) AND (ACI > 0)
=> start RTimer
SAC := SAC - 1
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
Start T2
OPEN AB 3 ABT-SEND-PDU
1)
DTA_ACK_PDU received (SDA.ind(serv_class = low/high))
\M-M AND (SAC = 0)
=> ABT.ind to LLI user <RC = ABT_RC5>
send ABT_REQ_PDU <RC = ABT_RC5> (SDA.req(low))
stop all timers, start T2, stop machines
OPEN AB 4 ABT-UPDATE
1)
DTA_ACK_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/DH))
\M-S AND (SAC = 0)
=> ABT.ind to LLI user <RC = ABT_RC5>
send ABT_REQ_PDU <RC = ABT_RC5> (S_UPDATE.req)
stop all timers, start T2, stop machines
OPEN DTC 14 OPEN
DTC_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (RCC < max RCC) AND (ACI = 0)
=> start DTC Res.(invoke ID)
RCC := RCC + 1
OPEN DTC 15 OPEN
DTC_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (RCC < max RCC) AND (ACI > 0)
=> start DTC Res.(invoke ID)
RCC := RCC + 1
start RTimer
1) see state diagram for connection release
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Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN AB 5 ABT-SEND-PDU
1)
DTC_REQ_PDU received (SDA.ind(serv_class = low))
\M-M AND (RCC ≥ max RCC)
=> 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
OPEN DTC 16 OPEN
DTC Res. finished
\M-M
=> RCC := RCC - 1
OPEN DTA 16 OPEN
DTA_REQ_PDU received (SDA.ind(serv_class = low/high)/
(C)SRD.con(L_status = DL/DH)/SRD.con(DL/DH))
\(M-M OR M-S with SI) AND (RAC < max RAC) AND (ACI = 0)
=> start DTA Ack.
RAC = RAC + 1
OPEN DTA 17 OPEN
DTA_REQ_PDU received
(SDA.ind(serv_class = low/high)/(C)SRD.con(L_status =
DL/DH)/SRD.con(DL/DH))
\(M-M OR M-S with SI) AND (RAC < max RAC) AND (ACI > 0)
=> start DTA Ack.
RAC = RAC + 1
start RTimer
OPEN AB 6 ABT-SEND-PDU
1)
DTA_REQ_PDU received (SDA.ind(serv_class = low/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
OPEN AB 7 ABT-UPDATE
1)
DTA_REQ_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/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
OPEN AB 8 ABT-UPDATE
1)
DTA_REQ_PDU received
((C)SRD.con(L_status = DL/DH)/SRD.con(DL/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
1) see state diagram for connection release
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Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN DTA 18 OPEN
DTA Ack. finished
\M-M OR M-S with SI
=> RAC := RAC - 1
OPEN IT 1 OPEN
STimer expired
\M-M OR acyc. M-S with SI
=> start STimer
start Idle Req.
OPEN IT 2 OPEN
STimer expired
\acyc. M-S without SI AND (poll entry enabled = true)
=> start STimer
IMA := true
start Idle Req.
OPEN IT 3 OP-POLL-LIST-ON
STimer expired
\acyc. M-S without SI AND (poll entry enabled = false)
=> start STimer
IMA := true
activate Poll List entry
(ENTRY.req(remote address/remote LSAP/unlock))
Start T1
OP-POLL-LIST-ON IT 4 OPEN
Poll List entry activated (ENTRY.con(OK))
\acyc. M-S without SI AND (IMA = true)
=> start Idle Req.
start STimer
poll entry enabled := true
Stop T1
OPEN IT 5 OPEN
Idle Req. finished
\ M-M OR acyc. M-S with SI
OPEN IT 6 OPEN
Idle Req. finished
\acyc. M-S without SI AND (SCC + SAC > 0)
=> IMA := false
OPEN IT 7 OP-POLL-LIST-OFF
Idle Req. finished
\acyc. M-S without SI AND (SCC + SAC = 0)
=> IMA := false
deactivate Poll List entry
(ENTRY.req(remote address/remote LSAP/lock))
Start T2
1) see state diagram for connection release
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OPEN IT 8 OPEN
IDLE_REQ_PDU received (SDA.ind(serv_class=low)/(C)SRD.con(L_status=DL))
\( M-M OR acyc. M-S) AND (ACI > 0)
=> start RTimer
OPEN AB 9 ABT-SEND-PDU
1)
RTimer expired
\M-M
=> ABT.ind to LLI user <RC = ABT_RC12>
send ABT_REQ_PDU <RC = ABT_RC12> (SDA.req(low))
stop all timers, start T2, stop machines
OPEN AB 10 ABT-UPDATE
1)
RTimer expired
\acyc. M-S
=> ABT.ind to LLI user <RC = ABT_RC12>
send ABT_REQ_PDU <RC = ABT_RC12> (S_UPDATE.req)
stop all timers, start T2, stop machines
OP-POLL-LIST-ON AB 11 CLOSED
error in the activation of the Poll List entry
(ENTRY.con(LS/NO/IV))
\acyc. M-S without SI
=> ABT.ind to LLI user <RC = LS/NO/IV, AD = ABT_AD2>
LLI-Fault.ind <RC = LLI_FMA7_RC4, AD = LS/NO/IV>
reset CREF
OP-POLL-LIST-ON AB 53 CLOSED
T1 expired
\acyc. M-S without SI
=> LLI-Fault.ind <RC = LLI_FMA7_RC20>
ABT.ind to LLI user <RC = ABT_RC9>
reset
CREFOP-POLL-LIST-OFF DT 1 OPEN
Poll List entry deactivated (ENTRY.con(OK))
\acyc. M-S without SI
=> poll entry enabled := false
Stop T2
OP-POLL-LIST-OFF AB 12 ABT-UPDATE
1)
error in the deactivation of the Poll List entry
(ENTRY.con(LS/NO/IV))
\acyc. M-S without SI
=> ABT.ind to LLI user <RC = LS/NO/IV, AD = ABT_AD3>
LLI-Fault.ind <RC = LLI_FMA7_RC5, AD = LS/NO/IV>
send ABT_REQ_PDU <RC = ABT_RC9> (S_UPDATE.req)
stop all timers, start T2, stop machines
1) see state diagram for connection release
Page 540
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Copyright by PNO 1997 - all rights reserved
Open at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
OP-POLL-LIST-OFF AB 54 ABT-UPDATE
1)
T2 expired
\acyc. M-S without SI
=> LLI-Fault.ind <RC = LLI_FMA7 RC20>
send ABT_REQ_PDU <RC = ABT_RC9> (S_UPDATE.req)
ABT.ind to LLI user <RC = ABT_RC9>
stop all timers, start T2, stop machines
OPEN AB 13 ABT-SAP-DEACTIVATE
1)
ABT_REQ_PDU received (SDA.ind(serv_class = low/high))
\M-M AND ( I OR O )
=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>
stop all timers, start T2, stop machines
SAP_DEACT.req
OPEN AB 14 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
OPEN AB 15 ABT-POLL-LIST-OFF
1)
ABT_REQ_PDU received ((C)SRD.con(L_status = DL/DH))
\M-S
=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>
deactivate Poll List entry
(ENTRY.req (remote address/remote LSAP/lock))
stop all timers, start T2, stop machines
OPEN AB 16 ABT-SEND-PDU
1)
ABT.req from LLI user
\M-M
=> send ABT_REQ_PDU (SDA.req(low))
stop all timers, start T2, stop machines
OPEN AB 17 ABT-UPDATE
1)
ABT.req from LLI user
\M-S
=> send ABT_REQ_PDU (S_UPDATE.req)
stop all timers, start T2, stop machines
OPEN AB 18 ABT-SEND-PDU
1)
unknown or faulty LLI PDU received
\M-M
=> ABT.ind to LLI user <RC = ABT_RC4>
send ABT_REQ_PDU <RC = ABT_RC4> (SDA.req(low))
stop all timers, start T2, stop machines
1) see state diagram for connection release