Спецификация протокола Profibus

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9.5 Local Functions at DP-Slave

9.5.1 General

On the interface to the User-Interface the DDLM of the DP-Slave makes available

the functions for local interactions between the User-Interface and the DDLM.

The DDLM maps the DDLM functions onto the confirmed services of FDL and FMA1/2.

The DDLM performs the handling of the local service confirmation independent of

FDL and FMA1/2. If a local error occurs during the service execution in the FDL

or in FMA1/2 then a DDLM_Fault.ind is generated from DDLM.

9.5.2 DDLM_Slave_Init

With this function the local FDL and the local FMA1/2 is initialized at the DP-

Slave for data communication and the local station address is delivered.

This function is mapped from the DDLM onto the following services of FMA1/2:

- Reset FMA1/2

- Set Value FMA1/2

- RSAP Activate FMA1/2

Table 26. DDLM_Slave_Init

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

! Parameter Name ! .req !

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

! Station_Address ! M !

! Baud_Rate ! U !

! Medium_red ! U !

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

In implementations where the layer 2 bus parameters are locally known in layer

2, the parameters Baud_Rate and Medium_red may be omitted.

Station_Address:

The parameter Station_Address specifies the local FDL address.

Baud_Rate:

The parameter Baud_Rate specifies the baud rate locally set.

Medium_red:

The parameter Medium_red specifies whether the system does or does not use a

redundant transmission technique.

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9.5.3 DDLM_Set_minTsdr

With this function the operation parameter minTsdr is delivered to the local FDL

at the DP-Slave.

This function is mapped from the DDLM onto the following FMA1/2 service:

- Set Value FMA1/2

Table 27. DDLM_Set_minTsdr

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

! Parameter Name ! .req !

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

! minTsdr ! M !

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

minTsdr:

The parameter minTsdr specifies the value for the minimum station delay time

(min T

SDR

) at the responder. If this value is zero then no change will take

effect.

9.5.4 DDLM_Enter

With this function the local FDL and the local FMA1/2 of the DP-Slave are

initialized for the user data exchange mode of the DDLM. At the same time the

assigned SAPs for the output data and the function DDLM_Global_Control are

activated and parameterized with a layer 2 access protection.

This function is mapped from the DDLM onto the following services of FMA1/2:

- RSAP Activate FMA1/2

- SAP Activate FMA1/2

Table 28. DDLM_Enter

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

! Parameter Name ! .req !

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

! Master_Add ! M !

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

Master_Add

The parameter Master_Add specifies the FDL address of the master which gets

access for direct writing of the outputs and for requesting the function

DDLM_Global_Control.

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9.5.5 DDLM_Leave

With this function the local FDL and the local FMA1/2 of the DP-Slave are

reconfigured and the user data exchange mode of the DDLM is terminated.

At the same time layer 2 access protection, the assigned SAPs for the output

data and the function DDLM_Global_Control in the layer 2 are deactivated. This

function has no input parameters.

This function is mapped from the DDLM onto the following FMA1/2 service:

- SAP Deactivate FMA1/2

9.5.6 DDLM_Fault

With this function the DDLM of the DP-Slave indicates an error to the User-

Interface during the execution of a local FDL or FMA1/2 service. This function

has no input and output parameters.

This function will be transferred by the DDLM to the User-Interface after the

occurrence of one of the following events:

- FMA1/2_RESET.con (NO/IV)

- FMA1/2_SET_VALUE.con (NO/IV)

- FMA1/2_RSAP_ACTIVATE.con (NO/IV)

- FMA1/2_SAP_ACTIVATE.con (NO/IV)

- FMA1/2_SAP_DEACTIVATE.con (NO/IV)

- FDL_REPLY_UPDATE.con (LS/LR/IV)

- FDL_DATA_REPLY.ind (DSAP inadmissible)

- FDL_DATA.ind (DSAP inadmissible)

- unknown FDL or FMA1/2 primitive

9.6 Local Functions at DP-Master

9.6.1 General

At the interface to the User-Interface the DDLM of the DP-Master provides

functions for local interactions between the User-Interface and the DDLM.

The DDLM maps the DDLM functions to the confirmed services of FDL and FMA1/2.

The treatment of local service confirmations will be done by the DDLM. If a

local error occurs in the FDL or in the FMA1/2 during execution of a local

service, the DDLM will produce a DDLM_Fault.ind.

9.6.2 DDLM_Master_Init

With this function the User-Interface of the DP-Master prepares the DDLM

(Requester) for communication with DP-Slaves.

This function will be mapped by the DDLM on the following service of FMA1/2:

- SAP Activate FMA1/2

This function has no parameters.

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9.6.3 DDLM_Responder_Init

With this function the User-Interface of the DP-Master (class 1) prepares the

DDLM (Responder) for communication with a DP-Master (class 2).

This function will be mapped by the DDLM on the following services of FMA1/2:

- RSAP Activate FMA1/2

- SAP Activate FMA1/2

Table 29. DDLM_Responder_Init

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

! Parameter Name ! .req ! .con !

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

! Poll_Timeout ! M ! !

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

Poll-Timeout:

The parameter Poll_Timeout specifies the maximum period of time during which the

response has to be picked up by the requester.

9.6.4 DDLM_Requester_Init

With this function the User-Interface of the DP-Master (class 2) prepares the

DDLM (Requester) for communication with a DP-Master (class 1).

This function will be mapped by the DDLM on the following service of the FMA1/2:

- SAP Activate FMA1/2

Table 30. DDLM_Requester_Init

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

! Parameter Name ! .req ! .con !

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

! Poll_Timeout ! M ! !

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

Poll-Timeout:

The parameter Poll_Timeout specifies the maximum period of time in which the

response has to be received from the responder.

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9.6.5 DDLM_Reset

With this function the local FDL and FMA1/2 will be reset.

This function will be mapped by the DDLM on the following service of the FMA1/2:

- Reset FMA1/2

This function has no parameters.

9.6.6 DDLM_Set_Bus_Par

With this function the layer 2 parameters from the bus parameter set will be

passed to the FDL.

This function will be mapped by the DDLM on the following service of the FMA1/2:

- Set Value FMA1/2

Table 31. DDLM_Set_Bus_Par

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

! Parameter Name ! .req ! .con !

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

! Bus_Para ! M ! !

! ! ! !

! Status ! ! M !

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

Bus_Para:

Description see section "Data Interface".

Status:

The parameter Status indicates success or failure of the function.

Possible values: OK,NO,IV

9.6.7 DDLM_Set_Value

With this function the FDL parameters can be passed to FMA1/2.

This function will be mapped by the DDLM on the following service of the FMA1/2:

- Set Value FMA1/2

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Table 32. DDLM_Set_Value

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

! Parameter Name ! .req ! .con !

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

! Variable ! M ! !

! Value ! M ! !

! ! ! !

! Status ! ! M !

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

Variable:

This parameter selects the FDL parameter which has to be changed.

Value:

This parameter contains the new value for the FDL parameter.

Status:

The parameter Status indicates success or failure of the function.

Possible values: OK,NO,IV

9.6.8 DDLM_Read_Value

With this function it is possible to read the FDL Variables.

This function will be mapped by the DDLM on the following service of the FMA1/2:

- Read Value FMA1/2

Table 33. DDLM_Read_Value

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

! Parameter Name ! .req ! .con !

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

! Variable ! M ! !

! ! ! !

! Status ! ! M !

! Value ! ! C !

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

Variable:

The parameter Variable selects the FDL Variable which has to be read.

Value:

This parameter contains the actual value of the read FDL parameter.

Status:

The parameter Status indicates success or failure of the function.

Possible values: OK,NO,IV

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9.6.9 DDLM_Delete_SC

With this function the statistic counters will be cleared (see section

"Statistic Counters").

This function will be mapped by the DDLM on the following service of the FMA1/2:

- Set Value FMA1/2

Table 34. DDLM_Delete_SC

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

! Parameter Name ! .req ! .con !

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

! Address ! M ! !

! ! ! !

! Status ! ! M !

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

Address:

The statistic counters of the station which is addressed by the parameter

Address will be cleared.

Status:

The parameter Status indicates success or failure of the function.

Possible values: OK,NO,IV

9.6.10 DDLM_Fault

With this function the DDLM indicates an error during execution of a local FDL

or FMA1/2 service to the User-Interface.

This function has no input and output parameters.

This function will be passed by the DDLM to the User-Interface after the

occurrence of one of the following events:

- FMA1/2_RESET.con (NO/IV)

- FMA1/2_SET_VALUE.con (NO/IV)

- FMA1/2_RSAP_ACTIVATE.con (NO/IV)

- FMA1/2_SAP_ACTIVATE.con (NO/IV)

- FMA1/2_SAP_DEACTIVATE.con (NO/IV)

- FDL_REPLY_UPDATE.con (LS/LR/IV)

- FDL_DATA_REPLY.ind (DSAP inadmissible)

- FDL_DATA.ind (DSAP inadmissible)

- unknown FDL or FMA1/2 Primitive

9.6.11 DDLM_Event

With this function the DDLM indicates an event notification of the layer 2 to

the User.

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Table 35. DDLM_Event

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

! Parameter Name ! .ind !

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

! Event ! M !

! Add_Info ! C !

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

Event, Add_Info:

These parameters can take the values which are allowed for the Event FMA1/2

service (e. g. Out_Of_Ring, GAP_event).

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10 Interface between User-Interface and User

10.1 DP-Master (class 1)

The interface between the User-Interface and the User at the DP-Master (class 1)

is defined as a data and service interface. At this interface all interactions

for the communication between the DP-Master (class 1) and the DP-Slaves will be

handled. This interface will be described in detail as follows.

Load_Bus_Par

User

Master-Parameterset

Bus-

Parameterset

User-Interface

Input_

Data

Slave-

Parameterset

Set_Mode

Global_Control

Mode_Chan

Mark

Read_Value

Delet_SC

Start

Stop

Continue

USIF

Scheduler

USIF-STATE:

- Offline

- Stop

- Clear

- Operate

Service_

Handler

Output_

Data

Diagnostic_

Data

Slave_Handler

Figure 17. Interface between User and User-Interface at

the DP-Master (class 1)

10.1.1 Data Interface

a) Bus Parameter Set:

The current bus parameter set is located in this area.

The bus parameter set consists of:

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- FDL operational parameter

- Error_Action_Flag:

This bit will be evaluated in the operation mode Operate and Clear. If data

transfer to at least one activated DP-Slave was impossible during

Data_Control_Time and if the Error_Action_Flag is set, the operation mode will

change from Operate to Clear. If the Error_Action_Flag is not set, the User-

Interface will remain in the operation mode Operate in the case of an error.

If the operation mode of the User-Interface shall be changed from Clear to

Operate, this will only be done if in the Data_Control_Time all DP-Slaves where

in the user data exchange mode if the bit Error_Action_Flag was set.

- Min_Slave_Interval:

This parameter specifies the smallest allowed period of time between two slave

poll cycles. This ensures that the sequence of function requests from the DP-

Master can be handled by the DP-Slave. This period of time will be complied by

the DP-Master (class 1) for every master-slave function with exception of the

function Global_Control. For the function Global_Control the user is responsible

for compliance with Min_Slave_Interval.

- Poll_Timeout:

In the case of master-master communication this parameter specifies the maximum

amount of time it may take the requester to fetch the response.

- Data_Control_Time

This parameter specifies the period of time during which the Data_Transfer_List

(see section "Control Intervals") will be updated at least once and will be made

available to the user.

The User can only read the current bus parameter set. The User can pass a new

bus parameter set to the User-Interface by means of the function Load_Bus_Par.

After that, the User-Interface transfers the new bus parameter set to the

current bus parameter set and loads the changed FDL operational parameters into

FDL control.

b) DP-Slave parameter sets:

The User-Interface needs a DP-Slave parameter set for every DP-Slave. This

parameter set contains the control bits Active and New_Prm.

- Active-Flag:

If the Active-Flag has the value False, the DP-Master stops the DP-Slave

handling to the concerned DP-Slave. In this state it is allowed to change

the DP-Slave parameter set, for Example by a DP-Master (class 2) with the

function DDLM_Download.

If the Active-Flag has the value True, the DP-Slave handling will be done

by the DP-Master (class 1) to the concerned DP-Slave. Changing the DP-

Slave parameter set in this state is reduced possible (see also New_Prm-

Flag).

- New_Prm-Flag

If this flag has the value False, user data will be transferred to this

DP-Slave in the user data exchange mode. If the flag is True, for one data

cycle parameter data will be transferred instead of user data. The

consistency of the parameter data has to be guaranteed by local measures.

After transmitting this data successfully the DP-Master (class 1) sets the