Спецификация протокола Profibus
Подождите немного. Документ загружается.
Page 241
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
+--------------+
! NON-EXISTENT !<---+
+--------------+ !
1 ! ! 2 ^ !
! +----+ !
V !
+--------------+ 5,6!
! UPLOADING !--->+
+--------------+ !
4 ! ! 3 ^ !
! +----+ !
V !
+--------------+ 5,6!
! UPLOADED !--->+
+--------------+
Figure 50. DomainUpload State Machine (Server)
Download and Upload shall not operate on the same Domain at the same time.
3.5.6.2 State Transitions
-----------------------------------------------------------------
Event
\Exit Condition
=> Action Taken
-----------------------------------------------------------------
1 InitiateUploadSequence.ind
\state machine Download in state
EXISTENT or READY or IN-USE
=> .res(+)
2 InitiateUploadSequence.ind
\state machine Download in state
LOADING or INCOMPLETE or COMPLETE
=> .res(-) object constraint conflict
3 UploadSegment.ind
\more follows = true
=> .res(+)
4 UploadSegment.ind
\more follows = false
=> .res(+)
5 TerminateUploadSequence.res(+/-)
6 Abort.ind
-----------------------------------------------------------------
Page 242
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
4.5.7 EXAMPLES
4.5.7.1 EXAMPLE of a Download Sequence
User Client Server
Initiate +-------+
----> Download ! Index !----->
Sequence +-------+
+-------+
<-----! R+ !
+-------+
+-------+
<-----! Index !
+-------+
Download +---------+----+
Segment ! Segment !More!----->
+---------+----+
. . .
+-------+
<-----! Index !
+-------+
Download +---------+----+
Segment ! Segment ! 0 !----->
+---------+----+
Terminate +-------+---+
Download <-----! Index !FR+!
Sequence +-------+---+
+-------+
-----------------------! R+ !----->
+-------+
R+ : positive acknowledgement
More : Identification that more segments follow
FR+ : Final Result of the Transmission
Figure 51. Example of a Download Sequence
Page 243
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
4.5.7.2 EXAMPLE of an Upload Sequence
User Client Server
Initiate +-------+
----> Upload ! Index !----->
Sequence +-------+
+-------+
<-----! R+ !
+-------+
Upload +-------+
Segment ! Index !----->
+-------+
+--------------+----+
<-----! Segment !More!
. +--------------+----+
.
Upload +-------+ .
Segment ! Index !----->
+-------+
+--------------+----+
<-----! Segment ! 0 !
+--------------+----+
Terminate +-------+
Upload ! Index !----->
Sequence +-------+
+-------+
<--------------------------------! R+ !
+-------+
R+ : positive acknowledgement
More : Identification that more segments follow
Figure 52. Example of an Upload Sequence
Page 244
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
4.6 Program Invocation Management
Services on the object Program Invocation:
- OD Services \ +--------------------+
- CreateProgramInvocation >---------->! Object Description !
- DeleteProgramInvocation / ! Program Invocation !
! !
- Start \ ! !
- Stop \ ! +--------------+ !
- Resume >------------>! Program ! !
- Reset / ! ! Invocation ! !
- Kill / ! +--------------+ !
+--------------------+
Figure 53. Program Invocation Services
4.6.1 Model Description
The Program Invocation model provides services to link domains to a program, to
start this program, to stop and to delete it. More than one Program Invocation
may be created in a device. A Program Invocation is defined by an entry in the
DP-OD.
4.6.2 The Program Invocation (PI) Object
A Program Invocation is an object, in which domains with code and data are com-
bined to an executable program. Program Invocations may be predefined or may be
created online. When the Object Dictionary (OD) is freshly loaded, all Program
Invocation Objects are deleted.
+--------------------------------+
! Object Description !
Index ! Program Invocation !
or ! !
Name ! +--------------+ ! +--------------+
------>!---->! !-- Index i ------->! Domain !
! ! Program ! : ! +--------------+
! ! Invocation ! : ! +--------------+
! ! !-- Index n ------->! Domain !
! +--------------+ ! +--------------+
+--------------------------------+
Figure 54. Overview of the Program Invocation
Page 245
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
4.6.2.1 Attributes
Object: Program Invocation
Key Attribute: Index
Key Attribute: PI name
Attribute: Number Of Domains
Attribute: Password
Attribute: Access Groups
Attribute: Access Rights
Attribute: Deletable
Attribute: Reusable
Attribute: PI State
Attribute: List of Domain Index
Attribute: Index
Attribute: Extension
Index
Logical address of the entry in the OD.
PI name
Name of the object. The existence and the length is defined in the OD object de-
scription.
Number Of Domains
Number of the domain indices entered in this Program Invocation. The number is
limited by the maximum PDU length of the Create Program Invocation service.
Password
This attribute contains the password for the Access Rights.
Access Groups
This Attribute relates the object to specific Access Groups. The object belongs
to the group when the corresponding bit is set.
Table 27. Access Groups for Program Invocation
+-----+----------------+
! Bit ! Meaning !
+-----+----------------+
! 7 ! Access Group 1 !
! 6 ! Access Group 2 !
! 5 ! Access Group 3 !
! 4 ! Access Group 4 !
! 3 ! Access Group 5 !
! 2 ! Access Group 6 !
! 1 ! Access Group 7 !
! 0 ! Access Group 8 !
+-----+----------------+
Page 246
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
Access Rights
This attribute contains information about the Access Rights. The specific Access
Right exists when the corresponding bit is set.
Table 28. Access Rights for PI
+-----+------+--------------------------------------------------+
! Bit ! Name ! Meaning !
+-----+------+--------------------------------------------------+
! 7 ! S ! Right to Start the PI for the registered !
! ! ! Password (Start, Resume, Reset) !
! 6 ! H ! Right to Stop the PI for the registered !
! ! ! Password (Stop) !
! 5 ! D ! Right to Delete the PI for the registered !
! ! ! Password (Kill, Delete Program Invocation) !
! 3 ! Sg ! Right to Start for Access Groups !
! 2 ! Hg ! Right to Stop for Access Groups !
! 1 ! Dg ! Right to Delete for Access Groups !
! 15 ! Sa ! Right to Start for all Communication Partners !
! 14 ! Ha ! Right to Stop for all Communication Partners !
! 13 ! Da ! Right to Delete for all Communication Partners !
+-----+------+--------------------------------------------------+
Deletable
This attribute indicates if the Program Invocation Object may be deleted using
the Delete Program Invocation service.
true <=> deletable
false <=> not deletable.
Reusable
This attribute indicates if the Program Invocation transits after execution to
the state IDLE or to the state UNRUNNABLE.
true <=> transits to the state IDLE
false <=> transits to the state UNRUNNABLE.
PI State
This attribute describes the state of the program.
1 <=> UNRUNNABLE
2 <=> IDLE
3 <=> RUNNING
4 <=> STOPPED
5 <=> STARTING
6 <=> STOPPING
7 <=> RESUMING
8 <=> RESETTING
List of Domain Index
This attribute contains the indices of the domains, which are combined to this
Program Invocation. The ordering of the entries of the domain indices in the
Program Invocation corresponds to the ordering in the Create Program Invocation
service. The first domain in the list of the indices shall contain an executable
program.
Extension
This attribute contains profile specific information.
Page 247
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
4.6.2.2 Object Description of the OD on Transmission
+-------+---------+------------+----------+---------+---------+//
! Index ! Object ! Number of ! Password ! Access ! Access !
! ! code ! Domains ! ! Groups ! Rights !
+-------+---------+------------+----------+---------+---------+
! 130 ! PI ! 7 ! 17 ! ! S H D !
+-------+---------+------------+----------+---------+---------+//
//+-----------+----------+----------+-----------+-----------+//
! Deletable ! Reusable ! PI State ! Domain ! Domain !
! ! ! ! Index (1) ! Index (2) !
+-----------+----------+----------+-----------+-----------+
! true ! true ! ! 34 ! 55 !
//+-----------+----------+----------+-----------+-----------+//
//+-----------+-----------+-----------+-----------+//
! Domain ! Domain ! Domain ! Domain !
! Index (3) ! Index (4) ! Index (5) ! Index (6) !
+-----------+-----------+-----------+-----------+
! 56 ! 66 ! 67 ! 68 !
//+-----------+-----------+-----------+-----------+//
//+-----------+----------------+-----------+
! Domain ! PI Name ! Extension !
! Index (7) ! ! !
+-----------+----------------+-----------+
! 77 ! P. Thiessmeier ! !
//+-----------+----------------+-----------+
Figure 55. Object Description of Program Invocation in the DP-OD (Example)
Object Code
Tag for the object Program Invocation, is transmitted in addition to the object
attributes for the GetOD service and the PutOD service.
4.6.3 Program Invocation Services
4.6.3.1 CreateProgramInvocation
With this service, domains (e.g programs, data regions), that have been defined
in the OD, are combined to a program and are defined online in the DP-OD. This
program is addressed by a logical address or a name. The Deletable attribute of
a Program Invocation, that is created by the Create Program Invocation service,
is set to true. The attribute Number of Domains in the object description is
created automatically by the server.
The first domain of the list of domains shall contain an executable program.
The Program Invocation is only created, if the rights for the use of the domains
exist. Otherwise a Result(-) is responded.
If the same Program Invocation with the same Access Rights already exists, no
new object is created. In this case, the logical address (Index) of the existing
object is given to the client.
Page 248
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
Table 29. Create Program Invocation
+---------------------------------+-----+-----+
! ! ! !
! Parameter Name !.req !.res !
! !.ind !.con !
+---------------------------------+-----+-----+
! Argument ! M ! !
! Password ! M ! !
! Access Groups ! M ! !
! Access Rights ! M ! !
! Reusable ! M ! !
! List of Domains ! M ! !
! Domain Index ! S ! !
! Domain Name ! S ! !
! PI Name ! U ! !
! Extension ! U ! !
! ! ! !
! Result(+) ! ! S !
! Index ! ! M !
! ! ! !
! Result(-) ! ! S !
! Error Type ! ! M !
+---------------------------------+-----+-----+
Argument
The argument contains the service specific parameters of the service request. If
Access Rights are not supported (Access Protection Supported = false), then the
parameters Password, Access Groups and Access Rights are not significant.
Password
This parameter states to which value the attribute Password shall be set.
Access Groups
This parameter states to which value the attribute Access Groups shall be set.
Access Rights
This parameter states to which value the attribute Access Rights shall be set.
Reusable
This parameter states to which value the attribute reusable shall be set.
List of Domains
This parameter contains the addresses of the domains, which shall be combined in
this Program Invocation to a program. Each address may be either a logical ad-
dress or a name.
Domain index
Index of a domain.
Domain name
Name of a domain.
PI Name
This parameter states, to which value the attribute name of the Program Invoca-
tion Object shall be set.
Extension
This parameter contains the Extension attribute.
Result(+)
The parameter shall indicate, that the service was completed successfully.
Page 249
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
Index:
The index that is associated with the created Program Invocation.
Result(-):
The Result(-) shall indicate that the service request was not completed success-
fully.
Error Type:
This parameter contains information about the reason, why the service was not
completed successfully.
4.6.3.2 DeleteProgramInvocation
With the Delete Program Invocation service programs that have been defined in
the DP-OD are deleted. Program Invocation Objects may only be deleted if their
attribute Deletable has the value true.
Table 30. Delete Program Invocation
+---------------------------------+-----+-----+
! ! ! !
! Parameter Name !.req !.res !
! !.ind !.con !
+---------------------------------+-----+-----+
! Argument ! M ! !
! Access Specification ! M ! !
! Index ! S ! !
! PI Name ! S ! !
! ! ! !
! Result(+) ! ! S !
! ! ! !
! Result(-) ! ! S !
! Error Type ! ! M !
+---------------------------------+-----+-----+
Argument
The argument contains the service specific parameters of the service request.
Access Specification
This parameter states if the index or the name is used for addressing.
Index
This parameter is the Logical Address of the Program Invocation in the OD to
which this service is related.
PI Name
This parameter is the name of the Program Invocation.
Result(+)
The Result(+) parameter shall indicate, that the service was completed success-
fully.
Result(-)
The Result(-) shall indicate that the service request was not completed success-
fully.
Error Type
This parameter contains information about the reason why the service was not
completed successfully.
Page 250
PROFIBUS-Specification-Normative-Parts-5:1997
Copyright by PNO 1997 - all rights reserved
4.6.3.3 Start
A program is started with this service. It runs from the beginning. The counters
of the used domains are incremented. Before that all corresponding domains are
checked if they are in the READY or in the IN USE state.
Table 31. Start
+---------------------------------+-----+-----+
! ! ! !
! Parameter Name !.req !.res !
! !.ind !.con !
+---------------------------------+-----+-----+
! Argument ! M ! !
! Access Specification ! M ! !
! Index ! S ! !
! PI Name ! S ! !
! Execution Argument ! U ! !
! ! ! !
! Result(+) ! ! S !
! ! ! !
! Result(-) ! ! S !
! Error Type ! ! M !
! PI State ! ! M !
+---------------------------------+-----+-----+
Argument
The argument contains the service specific parameters of the service request.
Access Specification
This parameter states if the index or the name is used for addressing.
Index
This parameter is the logical address of the Program Invocation in the OD to
which this service is related.
PI Name
This parameter is the name of the Program Invocation.
Execution Argument
This optional parameter of type octet string contains data that is given to the
Program Invocation for the start.
Result(+)
The Result(+) parameter shall indicate, that the service was completed success-
fully.
Result(-)
The Result(-) shall indicate that the service request was not completed success-
fully.
Error Type
This parameter contains information about the reason why the service was not
completed successfully.
PI State
This parameter indicates the state of the Program Invocation.