Спецификация протокола Profibus
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Copyright by PNO 1997 - all rights reserved
PROFIBUS Specification - Normative Parts
Part 7
Network Management
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Copyright by PNO 1997 - all rights reserved
CONTENTS
Page
1 Scope ..............................................................595
2 Normative References and additional Material .......................595
3 General ............................................................595
4 Fieldbus Management Layer 7 (FMA7) .................................595
4.1 Overview ...........................................................595
4.2 Features of FMA7 ...................................................596
4.3 Model of FMA7 ......................................................597
4.3.1 Local Management ...................................................597
4.3.2 Remote Management ..................................................597
4.3.3 Formal Description of FMA7 State Machines ..........................599
4.4 Context Management .................................................600
4.4.1 Model Description ..................................................600
4.4.2 The FMA7 CRL Object ................................................600
4.4.3 Services ...........................................................603
4.4.3.1 FMA7 Initiate ......................................................603
4.4.3.2 FMA7 Abort .........................................................604
4.4.4 Context Test in FMA7 ...............................................607
4.4.5 State Machine of a Management Connection ...........................607
4.4.5.1 State Machine Description ..........................................607
4.4.5.2 State Transitions ..................................................609
4.5 Configuration Management ...........................................615
4.5.1 CRL Management .....................................................615
4.5.1.1 Model Description ..................................................615
4.5.1.2 The CRL Object .....................................................615
4.5.1.3 CRL Management Services ............................................626
4.5.1.4 State Machine for Read-CRL .........................................633
4.5.1.5 State Machine for Load-CRL .........................................635
4.5.2 FDL Service Access Point ...........................................638
4.5.2.1 Model Description ..................................................638
4.5.2.2 The LSAP Object ....................................................638
4.5.2.3 Services ...........................................................639
4.5.3 PHY/FDL Variables ..................................................641
4.5.3.1 Model Description ..................................................641
4.5.3.2 Attributes .........................................................641
4.5.3.3 Services for PHY/FDL Variables .....................................641
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4.5.3.4 Range of Values of FDL Variables .................................. 646
4.5.3.5 Range of Values of PHY Variables .................................. 647
4.5.4 Identification .................................................... 647
4.5.4.1 Model Description ................................................. 648
4.5.4.2 The Ident List Object ............................................. 648
4.5.4.3 Station Ident List Object ......................................... 648
4.5.4.4 Services .......................................................... 652
4.5.5 Request FDL Status of all Stations (Live List) .................... 654
4.5.5.1 Model Description ................................................. 654
4.5.5.2 The Live List Object .............................................. 654
4.5.5.3 Attributes ........................................................ 654
4.5.5.4 Services .......................................................... 655
4.6 Fault Management .................................................. 655
4.6.1 Reset ............................................................. 656
4.6.1.1 Model Description ................................................. 656
4.6.1.2 Services .......................................................... 656
4.6.2 Network Events .................................................... 656
4.6.2.1 Model Description ................................................. 656
4.6.2.2 Services .......................................................... 656
4.7 Assignment of Services to Master/Slave and Services to Objects .... 658
4.7.1 Mapping of FMA7 Local Management Services ......................... 664
4.7.2 Mapping of FMA7 Remote Management Services ........................ 673
4.8 List of Object Attributes and Service Parameters .................. 675
4.9 Syntax Description ................................................ 677
4.9.1 The FMA7 PDU ...................................................... 677
4.9.2 Confirmed Service Request and Response ............................ 678
4.9.2.1 Read-CRL-Rem ...................................................... 678
4.9.2.2 InitiateLoadCRL-Rem ............................................... 678
4.9.2.3 Load-CRL-Rem ...................................................... 678
4.9.2.4 TerminateLoad-CRL-Rem ............................................. 678
4.9.2.5 SetValueRem ....................................................... 679
4.9.2.6 ReadValueRem ...................................................... 679
4.9.2.7 LSAP-StatusRem .................................................... 679
4.9.2.8 IdentRem .......................................................... 679
4.9.3 ServiceError ...................................................... 680
4.9.3.1 FMA7 TerminateLoad-CRL-Error ...................................... 680
4.9.3.2 FMA7 Error-Type ................................................... 681
4.9.4 FMA7 Initiate ..................................................... 682
4.9.4.1 FMA7 Initiate-Request ............................................. 682
4.9.4.2 FMA7 Initiate-Response ............................................ 682
4.9.4.3 FMA7 Initiate-Error ............................................... 682
4.9.5 General Substitutions ............................................. 682
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4.10 Error Reports ......................................................683
4.10.1 Meaning of FMA7 Error Class and FMA7 Error Code ....................683
4.10.2 Meaning of remaining Parameters ....................................685
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Copyright by PNO 1997 - all rights reserved
1 Scope
see part 5
2 Normative References and additional Material
see part 5
3 General
see part 5
4 Fieldbus Management Layer 7 (FMA7)
4.1 Overview
As a supplement to the FMS services, FMA7 provides services for configuration of
the bus and communication relationships, for supervision and diagnosis in the
operational phase and for establishing and releasing a management connection.
The functions of FMA7 are arranged in three groups:
1. context management
2. configuration management
3. fault management
The functions of context management allow:
- establishment and release of a management connection
The functions of configuration management allow:
- loading and reading of the Communication Relationship List (CRL)
- access to variables, counters and parameters of Layers 1/2
- identification of communication components of stations
- registration of stations
The functions of fault management allow:
- indication of faults and events
- reset of stations
The following figure shows the placement of FMA7 in the ISO/OSI Layer Model and
the interfaces to the other instances of the PROFIBUS Specification.
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*********
***** *********
**** ************
* Application Process ******
* *
******* ********
************* ********* ! ^
! ^ ******* ! !
! ! ! !
FMS Services FMA7 Services
! ! ! !
V ! V !
################### 1 ######################### 2 ###############
# # #
# # #
# F M S 3 F M A 7 #
# # #
# # #
################### 4 ################# 4 #### #
# # #
# L L I 5 #
# # #
####################################### 6 ############ 6 ########
# # #
# F D L # #
# # #
############################# F M A 1/2 #
# # #
# P H Y # #
# # #
############+####################################################
!
//==========+========== Transmission Media ====================//
1 FMS - User Interface for the FMS Services
2 FMA7 - User Interface for the FMA Services
3 FMA7 - FMS Interface, Management Interface of FMS for local functions
4 LLI - LLI User Interface
5 FMA7 - LLI Interface, Management Interface of LLI for local functions
6 FMA1/2 - FMA1/2 User Interface
Figure 1. Placement of FMA7 in the ISO/OSI Layer Model
4.2 Features of FMA7
The FMA7 is based on system management according to ISO/DIS 7498-4:1989.
The functions of FMA7 are organized such that simple stations of a PROFIBUS Sys-
tem may be realized without a full management.
The functionality of FMA7 is adapted to the requirements of fieldbus and in par-
ticular supports a central configuration, which is independent of manufacturer,
and supports the maintenance and starting-up of the fieldbus system.
FMA7 is based on the functions of FMA1/2 and on the management functions of LLI
and FMS.
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4.3 Model of FMA7
FMA7 describes the management objects, services and the resulting models. The
objects are implicitly described (by the PROFIBUS Specification). The access to
objects is realized with object specific services. It is distinguished between
local and remote FMA7 services. FMA7 services may not be executed in parallel.
4.3.1 Local Management
The local management is characterized by the following features:
- The local management services allow the manipulation of local management ob-
jects in the individual instances.
- The local management services are mapped by FMA7 onto the management services
of FMA1/2, LLI and FMS.
FMA7 provides the following local services:
InitiateLoad-CRL-Loc
Load-CRL-Loc
TerminateLoad-CRL-Loc
Read-CRL-Loc
SetValueLoc
ReadValueLoc
LSAP-StatusLoc
IdentLoc
GetLiveList
FMA7 Reset
FMA7 Event
The local management services are optional with the exception of the services
FMA7 Event and FMA7 Reset.
4.3.2 Remote Management
The remote management is characterized by the following features:
- The remote management services allow the manipulation of remote management ob-
jects in the remote station.
- The remote management is connection-oriented and uses the transport functiona-
lity of LLI.
- The remote management is a user of LLI (as FMS) and uses the LLI SAP = 1 for
the remote management services.
- The remote management services are characterized in that a service is perfor-
med by the remote user with the help of its local management.
- All PROFIBUS stations support remote management services as responder on ex-
actly one management connection. The management connection is defined with
regard to its properties and addressing at the responder of the remote mana-
gement services (see subclause 5.2.2.1 Default Management Connection). Devi-
ces for configuration and diagnosis support remote management services also
as a requester on several management connections.
- The FMA7 remote services are transmitted with FMA7 PDUs.
FMA7 provides the following remote services:
FMA7 Initiate
FMA7 Abort
InitiateLoad-CRL-Rem
Load-CRL-Rem
TerminateLoad-CRL-Rem
Read-CRL-Rem
SetValueRem
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ReadValueRem
IdentRem
LSAP-StatusRem
All remote management services are optional.
Default Management Connection
The specification of the default management connection makes a standardized ac-
cess to PROFIBUS stations possible for configuration or diagnosis devices. At
every PROFIBUS station, which supports remote FMA7 services as a responder, an
entry for a default management connection with CREF = 1 shall be entered in the
CRL. The default management connection (responder side) occupies only one entry
in the CRL. To allow a complete remote configuration of a station (Object Dic-
tionary (OD), Communication Relationship List (CRL) and bus parameters), two
connections for configuration shall be assigned in the CRL.
One management connection shall be for configuration of the CRL and the bus pa-
rameters and one FMS connection shall be for configuration of the OD.
The following CRL entry of a management connection is mandatory at the requester
of remote management services (for structure and meaning of the CRL see CRL Ob-
ject):
+===========================+=================+
! Attribute Name ! Range of Values !
+===========================+=================+
! CREF ! 2 .. FFFF hex !
+---------------------------+-----------------+
! Local LSAP ! 0, 2 .. 62, NIL!
+---------------------------+-----------------+
! Remote Address ! 0 .. 126 !
+---------------------------+-----------------+
! Remote LSAP ! 1 !
+---------------------------+-----------------+
! Type ! MMAC/MSAC !
+---------------------------+-----------------+
! LLI SAP ! 1 !
+---------------------------+-----------------+
! Connection Attribute ! I/D !
+---------------------------+-----------------+
Figure 2. CRL Entry of a Management Connection at the Requester of Remote Man-
agement Services
The values of the other attributes in the CRL entry of the management connection
are not defined by FMA7.
The following CRL entry of the management connection is mandatory at the re-
sponder of remote management services:
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+===========================+=================+
! Attribute Name ! Range of Values !
+===========================+=================+
! CREF ! 1 !
+---------------------------+-----------------+
! Local LSAP ! 1 !
+---------------------------+-----------------+
! Remote Address ! ALL !
+---------------------------+-----------------+
! Remote LSAP ! ALL !
+---------------------------+-----------------+
! Type ! MMAC/MSAC !
+---------------------------+-----------------+
! LLI SAP ! 1 !
+---------------------------+-----------------+
! Connection Attribute ! O !
+---------------------------+-----------------+
Figure 3. CRL Entry of the Management Connection at the Responder of Remote
Management Services
The values of the other attributes in the CRL entry of the management connection
are not defined by FMA7.
4.3.3 Formal Description of FMA7 State Machines
The formal description is based upon a model that describes the FMA7 protocol
with the help of state machines (represented by state diagrams). The protocol
sequences are described with different states (represented by rectangles with
state names) and transitions between states (represented by lines with arrows).
State changes are caused by events combined with conditions which cause actions
(reactions).
The description of state transitions is similar to the draft DIN ISO 8802 Part
4. The elements used are the sequence (current state, event / condition => ac-
tion, next state) as well as constants, variables, service primitives, functions
and procedures.
The detailed description of state transitions and actions is structured for
every state change as follows:
The first line defines the current state, the name of the transition and the
next state. Below, in the subsequent lines, follow:
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.
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4.4 Context Management
4.4.1 Model Description
The FMA7 context management services are used for establishing and releasing a
management connection. The establishment of a management connection is always
required when remote management services shall be executed. The context manage-
ment services are mandatory for all devices which support remote management. If
a PROFIBUS communication system does not support remote management the LSAP 1
shall not be activated.
4.4.2 The FMA7 CRL Object
The FMA7 Communication Relationship List (FMA7 CRL) contains the specific de-
scription of all management connections of a device independent of the time of
use. The FMA7 CRL consists of the header, the static and the dynamic part. In-
formation about the structure of the FMA7 CRL is entered into the FMA7 CRL
header. The FMA7 CRL header is entered under CREF 0. The FMA7 CRL is structured
in lines. Each line shall be addressed by the communication reference (CREF).
Every line contains the complete FMA7-specific description of the respective
management connection.
+--------+-----------------+---------------+
! CREF = ! Number of FMA7 ! Symbol Length !
! 0 ! CRL Entries ! !
+--------+-----------------+---------------+
Figure 4. Structure of the FMA7 CRL Header
Communication Reference
The CRL header is addressed with CREF = 0.
Number of FMA7 CRL Entries
Specifies the number of occupied entries in the FMA7 CRL.
Symbol Length
This attribute specifies the length of symbols of the FMA7 CRL and may only have
the values 0..32. The attribute shall be equal to the symbol length in the CRL
header of FMS.
0 <=> no symbols
+=====+=========================================+===+==//==+===+
! ! Communication Reference (CREF) ! ! ! !
! +-----------------------------------------+---+--//--+---+
! S ! Max FMA7 PDU Sending Low Prio ! ! ! !
! T +-----------------------------------------+---+--//--+---+
! A ! Max FMA7 PDU Receiving Low Prio ! ! ! !
! T +-----------------------------------------+---+--//--+---+
! I ! FMA7 Services Supported ! ! ! !
! C +-----------------------------------------+---+--//--+---+
! ! Symbol ! ! ! !
+=====+=========================================+===+==//==+===+
! ! CREL State ! ! ! !
!DY- +-----------------------------------------+---+--//--+---!
!NAMIC! Outstanding FMA7 Services Counter Req ! ! ! !
! +-----------------------------------------+---+--//--+---!
! ! Outstanding FMA7 Services Counter Res ! ! ! !
+=====+=========================================+===+==//==+===+
Figure 5. Structure of FMA7 CRL Entries