Спецификация протокола Profibus

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PROFIBUS-Specification-Normative-Parts-6:1997

a) the events and conditions, which shall have become true for the transition

to the following state, and after that:

b) the actions which are executed before entering the next state.

The events and conditions to be evaluated and the actions to be executed are de-

scribed with a syntax based on the programming language PL/1. The constants,

variables, functions and procedures are described similarly to the data defini-

tions in the programming language PL/1. The PL/1 based descriptions are used to

simplify the understanding of the written text. They do not intend to represent

compatible elements of the language PL/1.

The FDL indications and confirmations shall represent events for the LLI state

machines. The assignment of these primitives to the state machines is dependent

on the implementation and is not specified in this specification.

Performance optimized slave implementations, which are able to issue the immedi-

ate response of Layer 7 with the immediate response of Layer 2, do not need to

realize explicitly certain states and state transitions in the related state ma-

chines of the responder, as long as the specified functionality is assured.

Definition of an unllowed PDU or an unallowed service primitive:

The PDU or the service primitive is defined in this specification and used in

the implementation, but is not allowed in the current state.

Definition of an unknown PDU or an unknown service primitive:

The PDU or the service primitive is either not defined in this specification or

not used in the implementation.

All incoming events are processed first by the service related state machines

(DTC, DTCC, DTA, IDLE). If the current event has no impact on these four state

machines or if they are not existing, it shall be processed by the CREF related

state machines (open, connection establishment, connection release, DTU). If the

current event has no impact on these four state machines or if they are not ex-

isting, it shall be processed by the basic state machine. If one of the follow-

ing FDL service primitives ((C)SRD.con/SRD.ind)has an impact on two LLI state

machines it shall be processed by both state machines.

In the following figures, rectangles with numbers are used to mark transitions

into another state machine.

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PROFIBUS-Specification-Normative-Parts-6:1997

Legend used in the state diagrams:

Actions

Transition only for Master-Master Connections

Transition only for Master-Slave Connections

with and with no Slave Initiative

Transition for all Connection Types

Open Responder SAP

Transition only for the Master of a Master-

Slave Connection

Transition only for the Slave of a Master-

Slave Connection

Transition only for Master-Slave Connections

with no Slave Initiative

Defined Connection, Master-Master or Master-

Slave Communication

Open Connection at the Initiator, Master-

Master Communication

D:

I:

O:

normal:

italic:

Events or Commands

M

S

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PROFIBUS-Specification-Normative-Parts-6:1997

6.7.1 Start of LLI

State Diagram for Start of LLI

LLI-START

SAP-ACTIVATE

LLI-DISABLE

LOAD-POLL-LIST

SAP-DEACTIVATE

ERROR

35

1

24,25,45

26,38

2

17

14,34,65

6

32,33,3

9

3,

5, 48,

4

27,28,

29,41

18

12,

19

7, 54

10,11,50

30

37

13

CHECK-CRL

LOADING-CRL

15,31

20

16,40,36

43

44

49,

51

LLI-READY

9

21,22,23,

42,46,47

53

8, 52,

57, 58

55, 56

SAP

64

WAIT-FOR-

DEACT-CON

63, 67

61

62

59

60

Figure 108. State Diagram for Start of LLI

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PROFIBUS-Specification-Normative-Parts-6:1997

1 Description of State Transitions for start

Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

Power-On 1 LLI-START

=> start LLI CRL check

CRL load flag := false

LLI-START 2 SAP-ACTIVATE

LLI CRL check finished

\valid LLI CRL available

AND sufficient resources

AND LLI CRL contains at least one communication

relationship with a connection attribute unequal ”I”

OR no connection attribute

=> predefine the dynamic part of the LLI CRL

(R)SAP_ACT.req

LLI-START 59 LLI-READY

LLI CRL check finished

\valid LLI CRL available

AND sufficient resources

AND LLI CRL contains only communication relationships with a

connection attribute equal ”I”

=> predefine the dynamic part of the LLI CRL

(R)SAP_ACT.req

SAP-ACTIVATE 3 LLI-READY

(R)SAP_ACT.con(OK)

\all SAPs activated

AND LLI CRL contains no Poll List LSAP

AND CRL load flag = false

=> start of all LLI state machines related to CREF

SAP-ACTIVATE 53 LLI-READY

(R)SAP_ACT.con(OK)

\all SAPs activated

AND LLI CRL contains no Poll List LSAP

AND CRL load flag = true

=> start of all LLI state machines related to CREF

LLI Enable.con(OK)

SAP-ACTIVATE 4 LOAD-POLL-LIST

(R)SAP_ACT.con(OK)

\LLI CRL contains one Poll List LSAP

AND all SAPs activated

=> CSRD.req(Poll_List)

SAP-ACTIVATE 5 ERROR

(R)SAP_ACT.con(NO/IV)

\CRL load flag = false

=> LLI-Fault.ind<RC = LLI_FMA7_RC1, AD = M_status>

SAP-ACTIVATE 55 ERROR

(R)SAP_ACT.con(NO/IV)

\CRL load flag = true

=> LLI-Fault.ind<RC = LLI_FMA7_RC1, AD = M_status>

LLI Enable.con(IV)

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PROFIBUS-Specification-Normative-Parts-6:1997

Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

SAP-ACTIVATE 6 SAP-ACTIVATE

(R)SAP_ACT.con(OK)

\not all SAPs activated

=> (R)SAP_ACT.req, do not activate LSAP 1

if it is already activated

LOAD-POLL-LIST 7 LLI-READY

CSRD.con(L_status = OK)

\CRL load flag = false

=> start of all LLI state machines related to CREF

LOAD-POLL-LIST 54 LLI-READY

CSRD.con(L_status = OK)

\CRL load flag = true

=> start of all LLI state machines related to CREF

LLI Enable.con (OK)

LOAD-POLL-LIST 8 ERROR

CSRD.con(L_status = NO/LS/LR/IV)

\CRL load flag = false

=> LLI-Fault.ind<RC = LLI_FMA7_RC17, AD = L_status>

LOAD-POLL-LIST 57 ERROR

CSRD.con(L_status = NO/LS/LR/IV)

\CRL load flag = true

=> LLI-Fault.ind<RC = LLI_FMA7_RC17, AD = L_status>

LLI Enable.con(IV)

LLI-READY 9 SAP-DEACTIVATE

LLI Disable.req

\LLI CRL contains communication relationship

with CREF > 1

=> release all established connections and currently

establishing connections, except the

default management connection, <RC = ABT_RC24>;

delete all LLI state machines related to CREF

except for the default management CREF machines

SAP_DEACT.req, CRL load flag := true

SAP-DEACTIVATE 10 SAP-DEACTIVATE

SAP_DEACT.con(OK)

\SAP_DEACT.req not yet called for all SAPs

in {0, 2 to 63, NIL}

=> SAP_DEACT.req

SAP-DEACTIVATE 11 SAP-DEACTIVATE

SAP_DEACT.con(M_status = NO/IV)

\SAP_DEACT.req not yet called for all SAPs

in {0, 2 to 63, NIL}

=> LLI-Fault.ind<RC = LLI_FMA7_RC2, AD = M_status>

SAP_DEACT.req

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Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

SAP-DEACTIVATE 12 LLI-DISABLE

SAP_DEACT.con(OK)

\SAP_DEACT.req called for all SAPs in

{0, 2 to 63, NIL}

=> LLI Disable.con

LLI-DISABLE 13 LOADING-CRL

LLI Load CRL.req

\LLI CRL entry OK AND Number of

LLI CRL Entries not equal 0

=> LLI Load CRL.con(OK)

LLI-DISABLE 64 WAIT-FOR-DEACT-CON

LLI Load CRL.req

\LLI CRL entry OK

AND Number of LLI CRL Entries equals 0

AND CREF 1 existing in current CRL

AND state of CREF 1 equals closed

=> SAP_DEACT.req(SSAP = 1)

LLI-DISABLE 65 LLI-START

LLI Load CRL.req

\LLI CRL entry OK

AND Number of LLI CRL Entries equals 0

AND CREF 1 existing in current CRL

AND state of CREF 1 unequals closed

=> LLI Load CRL.con (SC)

LLI-DISABLE 14 LLI-START

LLI Load CRL.req

\LLI CRL entry NOK

=> LLI Load CRL.con(IV)

LOADING-CRL 15 LLI-START

LLI Load CRL.req

\LLI CRL entry NOK

=> LLI Load CRL.con(IV)

LOADING-CRL 16 LOADING-CRL

LLI Load CRL.req

\LLI CRL entry OK AND ( LLI CRL entry equals not CREF 1

OR ( LLI CRL entry equals CREF 1 AND CREF 1 not existing in

current CRL))

=> LLI Load CRL.con(OK)

LOADING-CRL 61 WAIT-FOR-DEACT-CON

LLI Load CRL.req

\LLI CRL entry OK AND ( LLI CRL entry equals CREF 1 AND

CREF 1 existing in current CRL AND state of CREF 1

equals closed)

=> SAP_DEACT.req(SSAP = 1)

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Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

LOADING-CRL 66 LLI-START

LLI Load CRL.req

\LLI CRL entry OK AND ( LLI CRL entry equals CREF 1 AND

CREF 1 existing in current CRL AND state of CREF 1

unequals closed)

=> LLI Load CRL.con (SC)

WAIT-FOR-DEACT-CON 62 LOADING-CRL

SAP_DEACT.con(OK)

=> LLI Load CRL.con(OK)

WAIT-FOR-DEACT-CON 63 ERROR

SAP_DEACT.con(NO/IV)

=> LLI Load CRL.con(SC)

LLI_Fault.ind< RC = LLI_FMA7_RC2, AD = M_status>

WAIT-FOR-DEACT-CON 67 ERROR

unallowed FMA1/2 primitive

=> LLI Load CRL.con(SC)

LLI_Fault.ind< RC = LLI_FMA7_RC22, AD = code of the primitive>

LLI-START 17 LLI-DISABLE

LLI Disable.req

=> LLI Disable.con

CRL load flag := true

ERROR 18 LLI-DISABLE

LLI Disable.req

\no SAP activated in {0, 2 to 63, NIL}

=> LLI Disable.con

CRL load flag := true

ERROR 19 SAP-DEACTIVATE

LLI Disable.req

\activated SAPs in {0, 2 to 63, NIL} available

=> SAP_DEACT.req

CRL load flag := true

LOADING-CRL 20 CHECK-CRL

LLI Enable.req

=> start LLI CRL check

LLI-READY 21 LLI-READY

any LLI service.req to the LLI FMA7 interface

\NOT LLI reset.req

AND NOT LLI Disable.req

AND NOT LLI Load CRL.req

AND NOT LLI Enable.req

=> execute service

service.con(+/-) to FMA7

LLI-READY 22 LLI-READY

LLI Enable.req

=> LLI Enable.con(SC)

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Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

LLI-READY 23 LLI-READY

LLI Load CRL.req

=> LLI Load CRL.con(SC)

LLI-START 24 LLI-START

any LLI service.req to the LLI FMA7 interface

\NOT LLI Disable.req

AND NOT LLI Load CRL.req

AND NOT LLI Enable.req

AND NOT LLI Reset.req

=> execute service

service.con(+/-) to FMA7

LLI-START 25 LLI-START

LLI Enable.req

=> LLI Enable.con(SC)

LLI-START 26 LLI-START

LLI Load CRL.req

=> LLI Load CRL.con(SC)

ERROR 27 ERROR

any service.req to the LLI FMA7 interface

\NOT LLI reset.req

AND NOT LLI Disable.req

AND NOT LLI Load CRL.req

AND NOT LLI Enable.req

=> execute service

service.con(+/-) to FMA7

ERROR 28 ERROR

LLI Enable.req

=> LLI Enable.con(SC)

ERROR 29 ERROR

LLI Load CRL.req

=> LLI Load CRL.con(SC)

LLI-READY 30 LLI-DISABLE

LLI Disable.req

\LLI CRL contains only CREF 1 (Management CREF)

=> LLI Disable.con

CRL load flag := true

LLI-DISABLE 32 LLI-DISABLE

any service.req to the LLI FMA7 interface

\NOT LLI reset.req

AND NOT LLI Disable.req

AND NOT LLI Load CRL.req

AND NOT LLI Enable.req

=> execute service

service.con(+/-) to FMA7

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Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

LLI-DISABLE 33 LLI-DISABLE

LLI Disable.req

=> LLI Disable.con

CRL load flag := true

LLI-DISABLE 34 LLI-START

LLI Enable.req

=> LLI Enable.con(SC)

<any State> 35 LLI-START

LLI reset.req

=> LLI reset.con

start LLI CRL check

CRL load flag := false

reset all CREFs

LOADING-CRL 36 LOADING-CRL

LLI service.req to the LLI FMA7 interface

\NOT LLI reset.req

AND NOT LLI Disable.req

AND NOT LLI Enable.req

AND NOT LLI Load CRL.req

=> execute service

service.con(+/-) to FMA7

LOADING-CRL 37 LLI-DISABLE

LLI Disable.req

=> LLI Disable.con

CRL load flag := true

LLI-START 38 LLI-START

any service primitive to the LLI FMA7 interface

\service not supported

OR unknown service primitive

=> LLI-Fault.ind <RC = LLI_FMA7_RC9>

LLI-DISABLE 39 LLI-DISABLE

any service primitive to the LLI FMA7 interface

\service not supported

OR unknown service primitive

=> LLI-Fault.ind <RC = LLI_FMA7_RC9>

LOADING-CRL 40 LOADING-CRL

any service primitive to the LLI FMA7 interface

\service not supported

OR unknown service primitive

=> LLI-Fault.ind <RC = LLI_FMA7_RC9>

ERROR 41 ERROR

any service primitive to the LLI FMA7 interface

\service not supported

OR unknown service primitive

=> LLI-Fault.ind <RC = LLI_FMA7_RC9>

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Start

Current State Transition Next State

Event

\Exit Condition

=> Action Taken

LLI-READY 42 LLI-READY

any service primitive to the LLI FMA7 interface

\service not supported

OR unknown service primitive

=> LLI-Fault.ind <RC = LLI_FMA7_RC9>

CHECK-CRL 43 LLI-START

LLI CRL check finished

\LLI CRL NOT OK OR resources not sufficient

=> LLI Enable.con(IV/LR)

CRL load flag := false

CHECK-CRL 44 SAP-ACTIVATE

LLI CRL check finished

\LLI CRL OK

AND resources sufficient

AND LLI CRL contains at least one communication

relationship with a connection attribute unequal ”I" or no

connection attribute

=> predefine dynamic part of the LLI CRL

(R)SAP_ACT.req, do not activate LSAP 1

if already activated

CHECK-CRL 60 LLI-READY

LLI CRL check finished

\valid LLI CRL available

AND sufficient resources

AND LLI CRL contains only communication

relationships with a connection attribute equal ”I”

=> predefine the dynamic part of the LLI CRL

(R)SAP_ACT.req

LLI-Enable.con(OK)

LLI-START 45 LLI-START

LLI CRL check finished

\LLI CRL NOT OK OR resources not sufficient

LLI-READY 46 LLI-READY

LLI PDU that cannot be assigned to a CREF

registered within the LLI CRL

=> ignore PDU

LLI-READY 47 LLI-READY

any service primitive to the LLI user - LLI interface

that cannot be assigned to a Layer 2 address

registered within the LLI CRL

=> ignore service primitive

LLI-Fault.ind <RC = LLI_FMA7_RC21>

SAP-ACTIVATE 48 ERROR

unallowed FMA1/2 primitive

\CRL load flag = false

=> LLI-Fault.ind<RC = LLI_FMA7_RC22,

AD = code of the primitive>

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