Спецификация протокола Profibus
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
DTC Responder at the Slave (cyclic)
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
DTCC-SEND-RES AB 6 ABT-UPDATE
1)
DTC_REQ_PDU received (SRD.ind (Serv.class = low))
AND NOT (Read OR Write)
\M-S
=> send ABT_REQ_PDU <RC = ABT_RC27> (UPDATE.req(low))
ABT.ind to LLI user <RC = ABT_RC27>
stop all timers, start T2, stop machines
DTCC-SEND-RES AB 7 ABT-UPDATE
1)
DTC_REQ_PDU received (SRD.ind(serv_class = low))
\M-S AND (new = true)
=> send ABT_REQ_PDU <RC = ABT_RC22> (UPDATE.req(low))
ABT.ind to LLI user <RC = ABT_RC22>
stop all timers, start T2, stop machines
1) see state diagram for connection release
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
6.7.3.10 State Diagram for DTA Requester at the Master
S_UPDATE.con(OK)
DTA-
WAIT-FOR-CON
DTA Req. started (M-M: <priority>/
send DTA_REQ_PDU
(M/M: SDA.req <priority>/
M/S: SRD.req (high))
M-S: priorit
y
= hi
g
h
)
ignore if data
DTA Req. finished
DTA_REQ_PDU sent
(
M-M: SDA.con
(
ok
)
/
M-S and priority = hi
g
h: SRD.con(DL/DH/NR)/
M-S and priority = low : CSRD.con(DL/DH/NR
update_status = LO))
DTA-
SEND-UPDATE
DTA Req. started
priority = low
(S_UPDATE.req)
send DTA_REQ_PDU
DTA-
WAIT-FOR-REQM
Figure 120. State Diagram for DTA Requester at the Master
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Copyright by PNO 1997 - all rights reserved
Description of State Transitions for DTA Requester at the Master
DTA Requester at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
DTA-WAIT-FOR-REQM DTA_REQM 1 DTA-SEND-UPDATE
DTA Req. started
\M-S AND (priority = low)
=> send DTA_REQ_PDU (S_UPDATE.req)
DTA-WAIT-FOR-REQM DTA_REQM 2 DTA-WAIT-FOR-CON
DTA Req. started
\M-S AND (priority = high)
=> send DTA_REQ_PDU (SRD.req(high))
DTA-WAIT-FOR-REQM DTA_REQM 3 DTA-WAIT-FOR-CON
DTA Req. started
\M-M
=> send DTA_REQ_PDU (SDA.req(low/high))
DTA-SEND-UPDATE DTA_REQM 4 DTA-WAIT-FOR-CON
update buffer loaded (S_UPDATE.con(OK))
\M-S
DTA-WAIT-FOR-CON DTA_REQM 5 DTA-WAIT-FOR-REQM
DTA_REQ_PDU sent (SRD.con(DL/DH/NR))
\M-S AND (priority = high)
=> finish DTA Req.
ignore data if present
DTA-WAIT-FOR-CON DTA_REQM 6 DTA-WAIT-FOR-REQM
DTA_REQ_PDU sent
(CSRD.con(L_status = DL/DH/NR, update_status = LO))
\M-S AND (priority = low)
=> finish DTA Req.
ignore data if present
DTA-WAIT-FOR-CON DTA_REQM 7 DTA-WAIT-FOR-REQM
DTA_REQ_PDU sent (SDA.con(OK))
\M-M
=> finish DTA Req.
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Copyright by PNO 1997 - all rights reserved
6.7.3.11 State Diagram for DTA Requester at the Slave
DTA-
WAIT-FOR-IND
UPDATE.con(OK)
DTA-
REPLY-UPDATE
DTA-
WAIT-FOR-REQS
DTA Req. started
DTA Req. finished
ignore data
DTA_REQ_PDU sent
(SRD.ind(low/hi
g
h,
update_status = LO/HI))
DTA_REQ_PDU
(UPDATE.req
<priority>)
send
Figure 121. State Diagram for DTA Requester at the Slave
Description of State Transitions for DTA Requester at the Slave
DTA Requester at the Slave
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
DTA-WAIT-FOR-REQS DTA_REQS 1 DTA-REPLY-UPDATE
DTA Req. started
\M-S
=> send DTA_REQ_PDU (UPDATE.req(priority))
DTA-REPLY-UPDATE DTA_REQS 2 DTA-WAIT-FOR-IND
update buffer loaded (UPDATE.con(OK))
\M-S
DTA-WAIT-FOR-IND DTA_REQS 3 DTA-WAIT-FOR-REQS
DTA_REQ_PDU sent
(SRD.ind(serv_class = low/high, update_status = LO/HI))
\M-S
=> finish DTA Req.
ignore data if present
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
6.7.3.12 State Diagram for DTA Acknowledge
UPDATE.con (OK)
(SDA.req(high)/
send DTA_ACK_PDU
start STimer (ACI>0)
(UPDATE.req (high))
send DTA_ACK_PDU
start STimer (ACI>0)
DTA.ind to LLI user
DTA Ack. finished
ignore data
(UPDATE.req (Slave : low)/
start DTA Ack.
(CSRD.con(DL)/
SRD.ind(low)/
SDA.ind(low))
SRD.con(DL)/
1: start DTA Ack. and CREF state
equals OPEN
(CSRD.con(DH)/SRD.ind (high)/
SRD.con(DH)/SDA.ind(high)
SRD.req(high))
send DTA_ACK_PDU
(SDA.req(low))
STimer (ACI>0)
DTA Ack. finished
ignore data
1,2: DTA.ind to LLI user
SRD.ind (low/high,
DTA_ACK_PDU sent
(SDA.con(OK)/
CSRD.con(DL/DH/NR,
update_status = LO)/
update_status = LO))
DTA_ACK_PDU sent
SRD.ind(low/high,
(SDA.con(OK)/
SRD.con(DL/DH/NR)/
update_status = HI))
S_UPDATE.con (OK)
UPDATE.con (OK)/
S_UPDATE.req)
start
M
S
S
DTA-L-WAIT-
FOR-BUFFER-
FREE
DTA-H-WAIT-
FOR-BUFFER-
FREE
DTA-L-
UPDATE
DTA-H-
REPLY-UPDATE
DTA-L-
SEND-ACK
DTA-H-
SEND-ACK
DTA-
WAIT-FOR-
REQ-PDU
Buffer_free
Buffer_free
Buffer_free
Buffer_free
send DTA_ACK_PDU
start STimer (ACI>0)
2: continue DTA Ack.
start DTA Ack. and CREF state not OPEN
(CSRD.con (DH), SDA.ind (DH)
no action
Figure 122. State Diagram for DTA Acknowledge
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Description of State Transitions for DTA Acknowledge
DTA Acknowledge
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
DTA-WAIT-FOR-REQ-PDU DTA 1 DTA-H-WAIT-FOR-BUFFER-FREE
DTA Ack. started (CSRD.con(L_status = DH)/
SRD.ind(serv_class = high)/SRD.con(DH)/
SDA.ind(serv_class = high))
\(M-M OR M-S) AND CREF state = OPEN
=> DTA.ind to LLI user
DTA-WAIT-FOR-REQ-PDU DTA 2 DTA-L-WAIT-FOR-BUFFER-FREE
DTA Ack. started (CSRD.con(L_status = DL)/
SRD.ind(serv_class = low)/SRD.con(DL)/
SDA.ind(serv_class = low))
\(M-M OR M-S) AND CREF state = OPEN
=> DTA.ind to LLI user
DTA-WAIT-FOR-REQ-PDU DTA 12 DTA-WAIT-FOR-REQ-PDU
DTA Ack. started (CSRD.con(L_status = DH)/
SDA.ind(serv_class = high))
\(M-M OR M-S) AND CREF state # OPEN
=> no action
DTA-WAIT-FOR-REQ-PDU DTA 13 DTA-H-WAIT-FOR-BUFFER-FREE
continue DTA-Ack.
\(M-M OR M-S with SI)
=> DTA.ind to LLI user
DTA-H-WAIT-FOR-BUFFER-FREE DTA 3 DTA-H-SEND-ACK
free memory available
\(M-M OR ((acyc. M-S) AND Master)) AND ACI > 0
=> send DTA_ACK_PDU (SDA.req(high)/SRD.req(high))
start Stimer
DTA-H-WAIT-FOR-BUFFER-FREE DTA 16 DTA-H-SEND-ACK
free memory available
\(M-M OR ((acyc. M-S) AND Master)) AND ACI = 0
=> send DTA_ACK_PDU (SDA.req(high)/SRD.req(high))
DTA-H-WAIT-FOR-BUFFER-FREE DTA 19 DTA-H-SEND-ACK
free memory available
\cyc. M-S and MASTER
=> send DTA_ACK_PDU (SRD.req(high))
DTA-H-WAIT-FOR-BUFFER-FREE DTA 4 DTA-H-REPLY-UPDATE
free memory available
\acyc. M-S AND Slave AND ACI > 0
=> send DTA_ACK_PDU (UPDATE.req(high))
start Stimer
DTA-H-WAIT-FOR-BUFFER-FREE DTA 17 DTA-H-REPLY-UPDATE
free memory available
\acyc. M-S AND Slave AND ACI = 0
=> send DTA_ACK_PDU (UPDATE.req(high))
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DTA Acknowledge
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
DTA-H-WAIT-FOR-BUFFER-FREE DTA 20 DTA-H-REPLY-UPDATE
free memory available
\cyc. M-S AND Slave
=> send DTA_ACK_PDU (UPDATE.req(high))
DTA-H-REPLY-UPDATE DTA 5 DTA-H-SEND-ACK
update buffer loaded (UPDATE.con(OK))
\M-S AND Slave
DTA-H-SEND-ACK DTA 6 DTA-WAIT-FOR-REQ-PDU
DTA_ACK_PDU sent (SDA.con(OK)/SRD.con(NR/DL/DH)/
SRD.ind(serv_class = low/high, update_status = HI))
\M-M OR ((acyc. M-S) OR(cyc. M-S AND MASTER))
=> finish DTA Ack.
ignore data if present
DTA-H-SEND-ACK DTA 22 DTA-WAIT-FOR-REQ-PDU
DTA_ACK_PDU sent
SRD.ind(serv_class = low/high, update_status = HI))
\cyc. M-S AND SLAVE AND (CCI=0 OR status DTCC=DTCC-WAIT-FOR-REQ-
PDU)
=> finish DTA Ack.
ignore data if present
DTA-H-SEND-ACK DTA 23 DTA-WAIT-FOR-REQ-PDU
DTA_ACK_PDU sent
SRD.ind(serv_class = low/high, update_status = HI))
\cyc. M-S AND SLAVE AND (CCI>0 AND status DTCC # DTCC-WAIT-FOR-REQ-
PDU)
=> finish DTA Ack.
ignore data if present
start T3
DTA-L-WAIT-FOR-BUFFER-FREE DTA 7 DTA-L-SEND-ACK
free memory available
\M-M AND ACI > 0
=> send DTA_ACK_PDU (SDA.req(low))
start Stimer
DTA-L-WAIT-FOR-BUFFER-FREE DTA 18 DTA-L-SEND-ACK
free memory available
\M-M AND ACI = 0
=> send DTA_ACK_PDU (SDA.req(low))
DTA-L-WAIT-FOR-BUFFER-FREE DTA 8 DTA-L-UPDATE
free memory available
\acyc. M-S AND ACI>0
=> send DTA_ACK_PDU (S_UPDATE.req/UPDATE.req(low))
start STimer
DTA-L-WAIT-FOR-BUFFER-FREE DTA 21 DTA-L-UPDATE
free memory available
\(acyc. M-S AND ACI=0) OR (cyc. M-S)
=> send DTA_ACK_PDU (S_UPDATE.req/UPDATE.req(low))
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DTA Acknowledge
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
DTA-L-UPDATE DTA 9 DTA-L-SEND-ACK
update buffer loaded (S_UPDATE.con(OK)/UPDATE.con(OK))
\M-S
DTA-L-SEND-ACK DTA 10 DTA-WAIT-FOR-REQ-PDU
DTA_ACK_PDU sent (SDA.con(OK)/
CSRD.con(L_status = NR/DL/DH, update_status = LO)/
SRD.ind(serv_class = low/high, update_status = LO))
\M-M OR((acyc. M-S) OR(cyc. M-S AND MASTER))
=> finish DTA Ack.
ignore data if present
DTA-L-SEND-ACK DTA 24 DTA-WAIT-FOR-REQ-PDU
DTA_ACK_PDU sent
SRD.ind(serv_class = low/high, update_status = LO))
\cyc. M-S AND SLAVE AND (CCI=0 OR status DTCC = DTCC-WAIT-FOR-REQ-
PDU)
=> finish DTA Ack.
ignore data if present
DTA-L-SEND-ACK DTA 25 DTA-WAIT-FOR-REQ-PDU
DTA_ACK_PDU sent
SRD.ind(serv_class = low/high, update_status = LO))
\cyc. M-S AND SLAVE AND (CCI>0 AND status DTCC # DTCC-WAIT-FOR-REQ-
PDU)
=> finish DTA Ack.
ignore data if present
start T3
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PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
6.7.4 Broadcast and Multicast
6.7.4.1 State Diagram for DTU Requester (Master)
LLI start routine
LLI Fault.ind
1:SDN.con(LS/LR/DS/IV)/
FDL primitive AND NOT
SDN.con
2:SDN.con(OK)
1: LLI Fault.ind
2: ignore, no action
DTU.req from LLI user
SDN.req
LLI primitive AND NOT
DTU.req
CONLS-
WAIT-FOR-CON
REQUESTER
CONLS-
Figure 123. State Diagram for DTU Requester (Master)
Page 580
PROFIBUS-Specification-Normative-Parts-6:1997
Copyright by PNO 1997 - all rights reserved
Description of State Transitions for DTU Requester at the Master
DTU Requester at the Master
Current State Transition Next State
Event
\Exit Condition
=> Action Taken
CONLS-REQUESTER CONLS_RQ 1 CONLS-REQUESTER
LLI primitive AND NOT DTU.req
\CONLS
=> LLI-Fault.ind <RC = LLI_FMA7_RC11, AD = code of the primitive>
CONLS-REQUESTER CONLS_RQ 2 CONLS-WAIT-FOR-CON
DTU.req from LLI user
\CONLS
=> SDN.req
CONLS-WAIT-FOR-CON CONLS_RQ 3 CONLS-REQUESTER
SDN.con(LS/LR/DS/IV)
\CONLS
=> LLI-Fault.ind <RC = LLI_FMA7_RC15, AD = LS/LR/DS/IV>
CONLS-WAIT-FOR-CON CONLS_RQ 4 CONLS-REQUESTER
FDL primitive AND NOT SDN.con
\CONLS
=> LLI-Fault.ind <RC = LLI_FMA7_RC7,
AD = code of the primitive>
CONLS-WAIT-FOR-CON CONLS_RQ 5 CONLS-REQUESTER
SDN.con(OK)
\CONLS