Спецификация протокола Profibus

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PROFIBUS-Specification-Normative-Parts-6:1997

Open at the Slave

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

OPEN AB 9 ABT-UPDATE

1)

unknown or faulty LLI PDU received

\M-S

=> send ABT_REQ_PDU <RC = ABT_RC4> (UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC4>

stop all timers, start T2, stop machines

OPEN AB 10 ABT-UPDATE

1)

DTC.res from LLI user

\M-S AND (invoke ID = unknown) AND (LLI-SAP=0)

=> send ABT_REQ_PDU <RC = ABT_RC7> (UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC7>

stop all timers, start T2, stop machines

OPEN AB 11 ABT-SAP-ACTIVATE

1)

ABT_REQ_PDU received (SRD.ind(serv_class = low/high))

\M-S AND O

=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>

stop all timers, start T2, stop machines

RSAP_ACT.req(Access = All, Indication_mode = Unchanged)

OPEN AB 12 CLOSED

ABT_REQ_PDU received (SRD.ind(serv_class = low/high))

\M-S AND D

=> ABT.ind to LLI user <RC = RC out of ABT_REQ_PDU>

reset CREF

OPEN AB 13 ABT-UPDATE

1)

ABT.req from LLI user

\M-S

=> send ABT_REQ_PDU (UPDATE.req(low))

stop all timers, start T2, stop machines

OPEN AB 14 ABT-UPDATE

1)

Layer 2 primitive AND NOT(UPDATE.con OR SRD.ind)

\M-S

=> send ABT_REQ_PDU <RC = ABT_RC9>

(UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC15, AD = code of the primitive>

LLI-Fault.ind <RC = LLI_FMA7_RC7, AD = code of the primitive>

stop all timers, start T2, stop machines

OPEN AB 15 ABT-UPDATE

1)

DTC.req OR ASS.req OR ASS.res from LLI user

\M-S

=> send ABT_REQ_PDU <RC = ABT_RC9>

(UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC19, AD = code of the primitive>

LLI-Fault.ind <RC = LLI_FMA7_RC11, AD = code of the primitive>

stop all timers, start T2, stop machines

1) see state diagram for connection release

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PROFIBUS-Specification-Normative-Parts-6:1997

Open at the Slave

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

OPEN AB 16 ABT-UPDATE

1)

unknown LLI primitive

\M-S

=> send ABT_REQ_PDU <RC = ABT_RC9>, (UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC17>

LLI-Fault.ind <RC = LLI_FMA7_RC9>

stop all timers, start T2, stop machines

OPEN AB 17 CLOSED

error in loading the update buffer (UPDATE.con(LS/IV))

\M-S AND D

=> ABT.ind to LLI user <RC = LS/IV, AD = ABT_AD1>

LLI-Fault.ind <RC = LLI_FMA7_RC3, AD = LS/IV>

reset CREF

OPEN AB 18 ABT-SAP-ACTIVATE

1)

error in loading the update buffer (UPDATE.con(LS/IV))

\M-S AND O

=> ABT.ind to LLI user <RC = LS/IV, AD = ABT_AD1>

LLI-Fault.ind <RC = LLI_FMA7_RC3, AD = LS/IV>

stop all timers, start T2, stop machines

RSAP_ACT.req(Access = All, Indication_mode = Unchanged)

OPEN AB 19 ABT-UPDATE

1)

error in loading the update buffer (UPDATE.con(LR))

\M-S

=> ABT.ind to LLI user <RC = LR, AD = ABT_AD1>

send ABT_REQ_PDU <RC = LR>

(UPDATE.req(low))

LLI-Fault.ind <RC = LLI_FMA7_RC3, AD = LR>

stop all timers, start T2, stop machines

OPEN DTCC 1 OPEN

SRD.ind(no data, update_status = LO/HI)

\cyc. M-S AND (status DTCC = DTCC-WAIT-FOR-REQ-PDU)

=> ignore

OPEN DTCC 4 OPEN

DTC_REQ_PDU received (SRD.ind(serv_class = low))

\cyc. M-S AND (status DTCC = DTCC-WAIT-FOR-REQ-PDU)

AND (CCI = 0)

AND (Read OR Write)

=> start DTCC Res.

OPEN DTCC 5 OPEN

DTC_REQ_PDU received (SRD.ind(serv_class = low))

\cyc. M-S AND (status DTCC = DTCC-WAIT-FOR-REQ-PDU)

AND (CCI > 0)

AND (Read OR Write)

=> start DTCC Res., start T3

1) see state diagram for connection release

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PROFIBUS-Specification-Normative-Parts-6:1997

Open at the Slave

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

OPEN DTA 10 OPEN

DTA_REQ_PDU received (SRD.ind(serv_class = low/high))

\cyc. M-S AND (RAC < max RAC) AND (CCI = 0)

=> start DTA Ack.

RAC := RAC + 1

OPEN DTA 11 OPEN

DTA_REQ_PDU received (SRD.ind(serv_class = low/high))

\cyc. M-S AND (RAC < max RAC) AND (CCI > 0)

AND (Status DTCC # DTCC-WAIT-FOR-REQ-PDU)

=> start DTA Ack.

RAC := RAC + 1

start T3

OPEN DTA 15 OPEN

DTA_REQ_PDU received (SRD.ind(serv_class = low/high))

\cyc. M-S AND (RAC < max RAC) AND (CCI > 0)

AND (Status DTCC = DTCC-WAIT-FOR-REQ-PDU)

=> start DTA Ack., RAC := RAC + 1

OPEN DTA 12 OPEN

DTA.req from LLI user

\cyc. M-S with SI AND (SAC < max SAC)

=> start DTA Req., SAC := SAC + 1

OPEN DTA 13 OPEN

DTA_ACK_PDU received (SRD.ind(serv_class = low/high))

\cyc. M-S with SI AND (SAC > 0) AND (CCI = 0)

=> SAC := SAC - 1

OPEN DTA 14 OPEN

DTA_ACK_PDU received (SRD.ind(serv_class = low/high))

\cyc. M-S with SI AND (SAC > 0) AND (CCI > 0)

AND (Status DTCC # DTCC-WAIT-FOR-REQ-PDU)

=> start T3

SAC := SAC - 1

OPEN DTA 16 OPEN

DTA_ACK_PDU received (SRD.ind(serv_class = low/high))

\cyc. M-S with SI AND (SAC > 0) AND (CCI > 0)

AND (Status DTCC = DTCC-WAIT-FOR-REQ-PDU)

=>SAC := SAC - 1

OPEN AB 21 ABT-UPDATE

1)

T3 expired

\cyc. M-S

=> send ABT_REQ_PDU <RC = ABT_RC11>

(UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC11>

stop all timers, start T2, stop machines

1) see state diagram for connection release

Page 554

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Open at the Slave

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

OPEN AB 22 ABT-UPDATE

1)

IDLE_REQ_PDU received (SRD.ind(serv_class = low))

\(acyc. M-S AND (ACI = 0)) OR (cyc. M-S)

=> send ABT_REQ_PDU <RC = ABT_RC3>

(UPDATE.req(low))

ABT.ind to LLI user <RC = ABT_RC3>

stop all timers, start T2, stop machines

OPEN AB 23 CLOSED

SRD.ind(no data, update_status = NO)

\M-S AND D

=> ABT.ind to LLI user <RC = ABT_RC25>

LLI-Fault.ind <RC = LLI_FMA7_RC24>

reset CREF

OPEN AB 24 ABT-SAP-ACTIVATE

1)

SRD.ind(no data, update_status = NO)

\M-S AND O

=> ABT.ind to LLI user <RC = ABT_RC25>

LLI-Fault.ind <RC = LLI_FMA7_RC24>

stop all timers, start T2, stop machines

RSAP_ACT.req(Access = All, Indication_mode = Unchanged)

OPEN AB 25 ABT-UPDATE

1)

DTC_REQ_PDU received (SRD.ind (serv_class = low))

\cyc. M-S AND NOT (Read or Write)

AND status DTCC = DTCC-WAIT-FOR-REQ-PDU

=> ABT.ind to LLI user <RC = ABT_RC27>

send ABT_REQ_PDU <RC = ABT_RC27> (update.req(low))

stop all timers, start T2, stop machines

1) see state diagram for connection release

Page 555

PROFIBUS-Specification-Normative-Parts-6:1997

6.7.3.3 State Diagram for DTC Requester (Master) on a Connection for Acyclic

Data Transfer (M-M or M-S)

(SDA.ind(low)/ SRD.con(DL)/ CSRD.con(DL))

DTC_RES_PDU received

DTC-

WAIT-FOR-RES

DTC-

SEND-UPDATE

S_UPDATE.con(OK)

DTC-

WAIT-FOR-CON

DTC.con to LLI user

DTC Req. finished

(SDA.con(OK)/

CSRD.con(DL/DH/NR,

DTC_REQ_PDU sent

update_status = LO))

ignore data

DTC Req. started

send (SDA.req(low))

DTC_REQ_PDU

ceived (CSRD.con (DL),

DTC_REQ_PDU sent

and DTC_RES_PDU re-

update_status = LO)

DTC Req. finished

DTC.con an

LLI user

(S_UPDATE.req)

DTC Req. started

DTC_REQ_PDU

send

Figure 114. State Diagram for DTC Requester (Master) on a Connection for Acy-

clic Data Transfer (M-M or M-S)

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PROFIBUS-Specification-Normative-Parts-6:1997

Description of State Transitions for DTC Requester at the Master (acyc. M-M or

M-S)

DTC Requester at the Master (acyc. M-M or M-S)

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

DTC-WAIT-FOR-REQ DTC 1 DTC-WAIT-FOR-CON

DTC Req. started

\M-M

=> send DTC_REQ_PDU (SDA.req(low))

DTC-WAIT-FOR-REQ DTC 2 DTC-SEND-UPDATE

DTC Req. started

\M-S

=> send DTC_REQ_PDU (S_UPDATE.req)

DTC-SEND-UPDATE DTC 3 DTC-WAIT-FOR-CON

update buffer loaded (S_UPDATE.con(OK))

\M-S

DTC-WAIT-FOR-CON DTC 4 DTC-WAIT-FOR-RES

DTC_REQ_PDU sent (SDA.con(OK))

\M-M

DTC-WAIT-FOR-CON DTC 5 DTC-WAIT-FOR-RES

DTC_REQ_PDU sent

(CSRD.con(L_status = DL/DH/NR, update_status = LO))

\M-S

AND NOT DTC_RES_PDU received

(CSRD.con(L_status = DL, update_status = LO))

=> ignore data if present

DTC-WAIT-FOR-CON DTC 6 DTC-WAIT-FOR-REQ

DTC_REQ_PDU sent AND DTC_RES_PDU received

(CSRD.con(L_status = DL, update_status = LO))

\M-S

=> finish DTC Req.

DTC.con to LLI user

DTC-WAIT-FOR-RES DTC 7 DTC-WAIT-FOR-REQ

DTC_RES_PDU received (SDA.ind(serv_class = low)/

(C)SRD.con(L_status = DL))

\M-M OR M-S

=> finish DTC Req.

DTC.con to LLI user

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6.7.3.4 State Diagram for DTC Responder (Master or Slave) on a Connection for

Acyclic Data Transfer (M-M or M-S)

DTC Res. started

DTC.ind to LLI user

UPDATE.con (OK)

DTC-

WAIT-FOR-

REQ-PDU

DTC.res

from LLI user

DTC.res from LLI user

send DTC_RES_PDU

(SDA.req(low))

start STimer (ACI>0)

(UPDATE.req (low))

DTC_RES_PDU

start STimer (ACI>0)

DTC Res. finished

i

g

nore data

DTC_RES_PDU sent

(SRD.ind(low/hi

g

h

SDA.con(OK))

update_status = LO)/

send

DTC-

SEND-RES

DTC-

WAIT-FOR-

LOC-RES

DTC-

REPLY-UPDATE

S

Figure 115. State Diagram for DTC Responder (Master or Slave) on a Connection

for Acyclic Data Transfer (M-M or M-S)

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6.7.3.5 Description of State Transitions for DTC Responder at the Master or

Slave (acyc. M-M or M-S)

DTC Responder at the Master or Slave (acyc. M-M or M-S)

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

DTC-WAIT-FOR-REQ_PDU DTC 1 DTC-WAIT-FOR-LOC-RES

DTC Res. started

\M-M OR M-S

=> DTC.ind to LLI user

DTC-WAIT-FOR-LOC-RES DTC 2 DTC-SEND-RES

DTC.res from LLI user

\M-M AND ACI > 0

=> send DTC_RES_PDU (SDA.req(low))

start Stimer

DTC-WAIT-FOR-LOC-RES DTC 6 DTC-SEND-RES

DTC.res from LLI user

\M-M AND ACI = 0

=> send DTC_RES_PDU (SDA.req(low))

DTC-WAIT-FOR-LOC-RES DTC 3 DTC-REPLY-UPDATE

DTC.res from LLI user

\M-S AND ACI > 0

=> send DTC_RES_PDU (UPDATE.req(low))

start STimer

DTC-WAIT-FOR-LOC-RES DTC 7 DTC-REPLY-UPDATE

DTC.res from LLI user

\M-S AND ACI = 0

=> send DTC_RES_PDU (UPDATE.req(low))

DTC-REPLY-UPDATE DTC 4 DTC-SEND-RES

update buffer loaded (UPDATE.con(OK))

\M-S

DTC-SEND-RES DTC 5 DTC-WAIT-FOR-REQ_PDU

DTC_RES_PDU sent (SDA.con(OK)/

SRD.ind(serv_class = low/high, update_status = LO))

\M-M OR M-S

=> finish DTC Res.

ignore data if present

Page 559

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6.7.3.6 State Diagram for IDLE Requester (Master) on a Connection for acyclic

Data Transfer (M-M or M-S)

IDLE Req. started

(SDA.req(low))

IDLE-

WAIT-FOR-CON

S_UPDATE.con(OK)

IDLE-

SEND-UPDATE

send IDLE_REQ_PDU

IDLE Req. started

IDLE Req. finished

i

g

nore data

(SDA.con(OK)/

CSRD.con(DL/DH/NR,

IDLE_REQ_PDU sent

update_status = LO))

(S_UPDATE.req)

IDLE_REQ_PDU

send

IDLE-

WAIT-FOR-REQM

Figure 116. State Diagram for IDLE Requester at the Master

Page 560

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Description of State Transitions for IDLE Requester at the Master

IDLE Requester at the Master

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

IDLE-WAIT-FOR-REQM IDLE_M 1 IDLE-WAIT-FOR-CON

IDLE Req. started

\M-M

=> send IDLE_REQ_PDU (SDA.req(low))

IDLE-WAIT-FOR-REQM IDLE_M 2 IDLE-SEND-UPDATE

IDLE Req. started

\M-S

=> send IDLE_REQ_PDU (S_UPDATE.req)

IDLE-WAIT-FOR-CON IDLE_M 3 IDLE-WAIT-FOR-REQM

IDLE_REQ_PDU sent (SDA.con(OK)/

CSRD.con(L_status = DL/DH/NR, update_status = LO))

\M-M OR M-S

=> finish IDLE Req.

ignore data if present

IDLE-SEND-UPDATE IDLE_M 4 IDLE-WAIT-FOR-CON

update buffer loaded (S_UPDATE.con(OK))

\M-S

Спецификация протокола Profibus

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