Спецификация протокола Profibus

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PROFIBUS-Specification-Normative-Parts-8:1997

Bit 3: Freeze

The states of the inputs are read and frozen. A further Freeze control

command repeats this procedure. DP-Slaves which support the freeze

mode has to ensure that already in the next data exchange cycle after

the Freeze control command the last frozen values of the inputs have

to be transferred.

Bit 2: Unfreeze

Freezing the inputs will be canceled.

Bit 1: Clear_Data

All outputs are cleared.

Bit 0: reserved

The term "reserved" specifies that these bits are reserved for future

extensions. If a DP-Slave have this function extensions not implemented and if

such a bit is set then the bit Diag.Not_Supported will be set and the DP-Slave

leaves the user data exchange mode.

Table 17. Specification of the bits for Un-/Sync and Un-/Freeze

+---------+---------+---------------------------------------+

! bit 2 ! bit 3 ! meaning !

! resp. 4 ! resp. 5 ! !

+---------+---------+---------------------------------------+

! 0 ! 0 ! no function !

! 0 ! 1 ! function is activated !

! 1 ! 0 ! function is deactivated !

! 1 ! 1 ! function is deactivated !

+---------+---------+---------------------------------------+

Group_Select:

This parameter determines which group(s) shall be addressed. The control command

takes effect if the AND operation between the Group_Ident (delivered in the

parameter data) and Group_Select results in a value different from zero. If the

parameter Group_Select is zero all DP-Slaves are addressed.

Type: Unsigned8

Status:

The parameter Status indicates only whether transmission of the request frame

was successful or not.

Possible values: OK,DS,NO,IV

9.3.8 Change Station Address of a DP-Slave

This function permits a DP-Master (class 2) to change the address of a DP-Slave.

If the DP-Slave has not the possibility to store (EEPROM,FLASH) or if the

address setting is realized with a switch, this function is refused with RS

error message. At the same time the Ident_Number is transmitted with this

function. The station address will be changed if the local and the transferred

Ident_Number correspond.

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Table 18. DDLM_Set_Slave_Add

+------------------------------+-----+-----+-----+

! Parameter Name !.req !.ind !.con !

! ! ! ! !

+------------------------------+-----+-----+-----+

! Rem_Add ! M ! ! M !

! New_Slave_Add ! M ! M ! !

! Ident_Number ! M ! M ! !

! No_Add_Chg ! M ! M ! !

! Rem_Slave_Data ! U ! C ! !

! ! ! ! !

! Status ! ! ! M !

+------------------------------+-----+-----+-----+

Rem_Add:

The parameter Rem_Add (Remote_Address) specifies the previous FDL address of the

remote station.

Type: Unsigned8

Range: 0 to 125;126 (default address)

New_Slave_Add:

This parameter contains the new DP-Slave address which is to be set.

Type: Unsigned8

Range: 0 to 125

Ident_Number:

This number specifies the station type (see section "Manufacturer Identifier").

Type: Unsigned16

No_Add_Chg:

This parameter specifies whether it is allowed to change the DP-Slave address

again at a later date. If this is not allowed then it is only possible to change

the address with this function after the initial reset. After the initial reset

the DP-Slave takes the default address 126.

Type: Boolean

True: change of address is only possible after the initial reset

False: change of address is also possible later

Rem_Slave_Data:

With this parameter it is possible to deliver user specific data. The data are

stored in the DP-Slave if there exists a possibility (EEPROM, FLASH).

Type: Octet String

Length: Preferably 0 to 28 (extendible to 240, see section "Restrictions")

Status:

The parameter Status indicates if the request frame was sent successfully and

was accepted by the DP-Slave.

The acknowledgement does not contain whether the new values were accepted by the

DP-Slave.

The master shall check the correct execution of the function by using

DDLM_Slave_Diag.req with the new DP-Slave address.

Possible values: OK,DS,NA,RS,RR,UE,RE

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9.4 DP-Master - DP-Master Functions

9.4.1 Read Master Diagnostic Information

With this function it is possible to request both the diagnostic information of

its assigned DP-Slaves deposited in the DP-Master (class 1) and its own status.

The diagnostic information are structured in a system wide diagnostic

information collection and in a station related single diagnostic. Which

diagnostic is requested depends on the request parameters of the function.

Table 19. DDLM_Get_Master_Diag

+------------------------------+-----+-----+-----+-----+

! Parameter Name !.req !.ind !.res !.con !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

! Rem_Add ! M ! ! ! !

! Identifier ! M ! M ! ! !

! ! ! ! ! !

! Status ! ! ! M ! M !

! Diagnostic_Data ! ! ! C ! C !

! Diag_Data ! ! ! S ! S !

! System_Diagnostic ! ! ! S ! S !

! Data_Transfer_List ! ! ! S ! S !

! Master_Status ! ! ! S ! S !

+------------------------------+-----+-----+-----+-----+

Rem_Add:

The parameter Rem_Add (Remote_Address) specifies the FDL address of the DP-

Masters from which the diagnostic information are requested.

Type: Unsigned8

Range: 0 to 125

Identifier:

This parameter specifies the type of the requested diagnostic information or the

FDL address of a DP-Slave.

Type: Unsigned8

Range:

0-125 ≥ Diag_Data of the DP-Slave

126 ≥ System_Diagnostic

127 ≥ Master_Status

128 ≥ Data_Transfer_List

129-255 ≥ reserved

Status:

The parameter Status indicates success or failure of the function.

Possible values: OK,DS,NA,RS,RR,UE,RE,TO,FE,NE,IP,AD,EA,LE

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Diagnostic_Data:

Different diagnostic information are transmitted depending on Identifier.

Diag_Data (Identifier = 0 to 125):

This parameter is described in section "Read DP-Slave Diagnostic Information".

System_Diagnosic (Identifier = 126):

Type: Octet String

Length: 16

Octet 1:

bit 0 = 1 station number 0 station has reported diagnostic

bit 0 = 0 station number 0 station has reported no diagnostic

bit 1 = 1 station number 1 station has reported diagnostic

bit 1 = 0 station number 1 station has reported no diagnostic

etc.

Octet 16:

.

bit 5 = 1 station number 125 station has reported diagnostic

bit 5 = 0 station number 125 station has reported no diagnostic

bit 6, bit 7 = 0 (not used)

Master_Status (Identifier = 127):

Type: Octet String

Length: 16

Octet 1: USIF_State (see section "Set Operation Mode")

40H = Stop

80H = Clear

C0H = Operate

Octet 2 and Octet 3 (unsigned16): Ident_Number

Octet 4: Hardware Release (DDLM/User-Interface)

Octet 5: Firmware Release (DDLM/User-Interface)

Octet 6: Hardware Release (User)

Octet 7: Firmware Release (User)

Octet 8 to 16:

reserved

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Data_Transfer_List (Identifier = 128):

Type: Octet String

Length: 16

Meaning:

The user data exchange mode between the DP-Master (class 1) and its assigned DP-

Slaves is supervised on the master side with Data_Control_Time. By this means it

is checked whether within a projectable time an user data transfer to the

associated DP-Slaves was executed at least once. The Data_Transfer_List is

updated at least once within Data_Control_Time.

Octet 1:

bit 0 = 1 user data exchange executed with station number 0

bit 0 = 0 no user data exchange with station number 0

bit 1 = 1 user data exchange executed with station number 1

bit 1 = 0 no user data exchange with station number 1

etc.

Octet 16:

.

bit 5 = 1 user data exchange executed with station number 125

bit 5 = 0 no user data exchange with station number 125

bit 6, bit 7 = 0 (not used)

9.4.2 Up-/Download

These functions permit a DP-Master (class 2) to transfer or to read a data area

to or from another DP-Master (class 1). An access protection can be guaranteed

with the functions DDLM_Start_Seq and DDLM_End_Seq.

Description of the interactions of the Upload and Download functions:

- DDLM_Download

The beginning of the Download function can be signalized with the function

DDLM_Start_Seq. The actual data set is transmitted in blocks with the function

DDLM_Download in the area of the DP-Master marked Area_Code .

After the complete transmission and possible activation, the process shall be

terminated with the function DDLM_End_Seq, if the function DDLM_Download was

started with the function DDLM_Start_Seq.

- DDLM_Upload

The Upload is executed in the same way as the Download. It is possible to

transfer single data areas without the functions DDLM_Start_Seq and

DDLM_End_Seq. Consistency of the transferred data is not guaranteed in this

case.

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Table 20. DDLM_Start_Seq

+------------------------------+-----+-----+-----+-----+

! Parameter Name !.req !.ind !.res !.con !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

! Rem_Add ! M ! ! ! !

! Req_Add ! ! M ! ! !

! Area_Code ! M ! M ! ! !

! Timeout ! M ! M ! ! !

! ! ! ! ! !

! Status ! ! ! M ! M !

! Max_Len_Data_Unit ! ! ! C ! C !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

Table 21. DDLM_Download

+------------------------------+-----+-----+-----+-----+

! Parameter Name !.req !.ind !.res !.con !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

! Rem_Add ! M ! ! ! !

! Req_Add ! ! M ! ! !

! Area_Code ! M ! M ! ! !

! Add_Offset ! M ! M ! ! !

! Data ! M ! M ! ! !

! ! ! ! ! !

! Status ! ! ! M ! M !

+------------------------------+-----+-----+-----+-----+

Table 22. DDLM_Upload

+------------------------------+-----+-----+-----+-----+

! Parameter Name !.req !.ind !.res !.con !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

! Rem_Add ! M ! ! ! !

! Req_Add ! ! M ! ! !

! Area_Code ! M ! M ! ! !

! Add_Offset ! M ! M ! ! !

! Data_Len ! M ! M ! ! !

! ! ! ! ! !

! Status ! ! ! M ! M !

! Data ! ! ! C ! C !

+------------------------------+-----+-----+-----+-----+

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Table 23. DDLM_End_Seq

+------------------------------+-----+-----+-----+-----+

! Parameter Name !.req !.ind !.res !.con !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

! Rem_Add ! M ! ! ! !

! Req_Add ! ! M ! ! !

! ! ! ! ! !

! Status ! ! ! M ! M !

+------------------------------+-----+-----+-----+-----+

Rem_Add:

The parameter Rem_Add (Remote_Address) specifies the FDL address of the remote

station.

Type: Unsigned8

Range: 0 to 125

Req_Add:

This parameter contains the station address of the requester. With the help of

this address access protection in the responder is secured.

Type: Unsigned8

Range: 0 to 125

Area_Code:

The parameter Area_Code identifies the area which shall be loaded or read. If

the parameter Area_Code of the function DDLM_Start_Seq is set to a value of 255,

local access protection for a determined Area_Code is not guaranteed for the

functions following. The local access protection ensures that the user cannot

access the partially loaded data during the sequence.

Type: Unsigned8

Range:

0 to 125 DP-Slave parameter set (description see

section "Coding of Parameter Set of DP-Slave")

126 reserved

127 Bus parameter set (description see section "Coding of the Bus

Parameter Set")

128 reserved

129 statistic counters (description see section "Coding of

Statistic Counters")

130 to 135 reserved for diagnostic message filter

136 to 139 reserved for the transfer of the master parameter set

140 to 254 reserved

255 DDLM_Start_Seq: No local access protection

At the user in the DP-Master (class 1) an intermediate buffer shall be made

available which is only reserved for storing the bus parameter set. The Download

function transfers the bus parameter set into the intermediate buffer. With the

functions DDLM_Act_Param or DDLM_Act_Para_Brct the bus parameter set is taken by

the User-Interface with the help of the function Load_Bus_Par from the

intermediate buffer into the active buffer. Then the bus parameter set will be

activated and retained unchanged in the intermediate buffer. The Upload function

always reads out the active buffer.

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Timeout:

This parameter defines the control time between two successive Upload/Download

functions. If this time expires the access protection is deactivated. The

previously transferred data are invalid.

Type: Unsigned16

Time base: 1ms

Add_Offset:

This parameter identifies the offset in bytes to the begin of the area which is

specified by the Area_Code.

Type: Unsigned16

Data:

This parameter contains the area data to be transferred.

Type: Octet String

Length: 1 to 240

Data_Len:

The parameter defines the length of the requested data.

Type: Unsigned8

Range: 1 to 240

Status:

The parameter Status indicates success or failure of the function.

Possible values:

DDLM_Start_Seq: OK,DS,NA,RS,RR,UE,TO,FE,RE,NE,AD,IP,NI,

SE,SC,EA,LE,RE

DDLM_Download: OK,DS,NA,RS,RR,UE,TO,FE,RE,NE,AD,EA,LE,SC,NI,NC

DDLM_Upload: OK,DS,NA,RS,RR,UE,TO,FE,RE,NE,EA,LE,NI,SC,AD

DDLM_End_Seq: OK,DS,NA,RS,RR,UE,TO,FE,RE,NI,SE,NE,AD,EA,LE,NC

Max_Len_Data_Unit:

The parameter Max_Len_Data_Unit defines the maximum possible length of the

parameter Data in the following Upload/Download frames.

Type: Unsigned8

Range: 1 to 240

9.4.3 Activate Parameter Set (unconfirmed)

After the Download of a parameter set this can be accepted and activated with

the function DDLM_Act_Para_Brct.

This function can be sent simultaneously to one (single) or many (multicast) DP-

Master (class 1) in dependence of the parameter Rem_Add.

In the operation modes Clear and Operate of the DP-Master (class 1) User-

Interface, the activation of the bus parameter set with changed FDL parameters

Baud_Rate or FDL_Add will not take place.

This function is not acknowledged by the receiver (reason: a possible change of

baud rate must take effect at all addressed DP-Masters nearly at the same time).

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Table 24. DDLM_Act_Para_Brct

+------------------------------+-----+-----+-----+

! Parameter Name !.req !.ind !.con !

! ! ! ! !

+------------------------------+-----+-----+-----+

! Rem_Add ! M ! ! !

! Area_Code ! M ! M ! !

! ! ! ! !

! Status ! ! ! M !

+------------------------------+-----+-----+-----+

Rem_Add:

The parameter Rem_Add (Remote_Address) specifies the FDL address of the remote

station.

Type: Unsigned8

Range: 0 to 125,127

Area_Code:

The parameter Area_Code identifies the area which shall be activated.

Type: Unsigned8

Range:

0 to 126 not allowed

127 bus parameter set

128 to 129 reserved

130 to 135 reserved for diagnostic message filter

136 to 139 reserved for the master parameter set

140 to 254 reserved

255 not allowed

In the presence of several DP-Masters (class 2) or FMS stations, it shall be

guaranteed that the old and the new bus parameter sets are compatible.

Status:

The parameter Status indicates only whether the transmission of the request

frame was successful or not.

Possible values: OK,DS

9.4.4 Activate/Deactivate Parameter Set

With the help of this function it is possible at the DP-Master (class 1)

- to activate or to deactivate a parameterized DP-Slave or

- to change the operation mode of the User-Interface or

- to accept and activate the bus parameter set.

If the loaded bus parameter set contains a changed baud rate or station address

then the new bus parameter set shall be activated with the function

DDLM_Act_Para_Brct.

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Table 25. DDLM_Act_Param

+------------------------------+-----+-----+-----+-----+

! Parameter Name !.req !.ind !.res !.con !

! ! ! ! ! !

+------------------------------+-----+-----+-----+-----+

! Rem_Add ! M ! ! ! !

! Area_Code ! M ! M ! ! !

! Activate ! M ! M ! ! !

! ! ! ! ! !

! Status ! ! ! M ! M !

+------------------------------+-----+-----+-----+-----+

Rem_Add:

The parameter Rem_Add (Remote_Address) defines the FDL address of the DP-Master

at which the function DDLM_Act_Param shall be executed.

Type: Unsigned8

Range: 0 to 125

Area_Code:

The parameter Area_Code identifies the area which shall be activated/deactivated

with the exception of the operation mode.

Type: Unsigned8

Range:

0 to 125 DP-Slave parameter set

The Active Flag in the DP-Slave parameter set of the

DP-Master (class 1) is influenced accordingly.

Thereupon, the DP-Slave concerned takes part in the

cyclic user data exchange mode or is removed from this

mode and no longer addressed.

126 reserved

127 bus parameter set

128 operation mode (description see section "Set Operation Mode")

129 reserved

130 to 135 reserved for diagnostic messages filter

136 to 139 reserved for activation of the master parameter set

140 to 255 reserved

Activate:

The meaning and the possible values of this parameter depend on the Area_Code.

Type: Unsigned8

Area_Code: 0 to 125 (DP-Slave parameter set)

Activate: 80H

Deactivate: 00H

Area_Code: 127 (bus parameter set)

Activate: 255

Area_Code: 128 (operation mode)

Stop: 40H

Clear: 80H

Operate: C0H

Status:

The parameter Status indicates success or failure of the function.

Possible values: OK,DS,NA,RS,RR,UE,TO,FE,RE,NE,AD,IP,SC,NI,DI,EA,LE

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