FC310x - PCI Cards for PROFIBUS

PROFIBUS DPV1

On a C1 connection, the master supports the Read and Write services, and on the C2 connection it supports the Read, Write, Data_Transport, Initiate and Abort services.

 

C1 Connection (MSAC-C1)

The C1 connection is reserved for the master that cyclically exchanges data with the slave (C1 master). In order for a slave to be able to use the C1 connection, the slave must support DPV1 (this means that the line "DPV1_Slave = 1" and the keyword "C1_Max_Data_Len" with an appropriate length must be in the GSD file). If it is also generally necessary to activate the C1 functionality by setting bit 7 in the PrmData byte 0 (see the slave's PROFIBUS tab) for the corresponding slave (this is done automatically for those Beckhoff devices that support DPV1).

MSAC-C1-Read is shown in ADS-Read, and MSAC-C1-Write is mapped in ADS-Write:

 
 

MSAC-C1 Read

ADS-Read parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
Slot number (DPV1 parameter)
IndexOffset 
Index (DPV1 parameter)
Length
Length of the data that is to be read
Data
In response: data that has been read
 
 

MSAC-C1 Write

ADS-Write parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
Slot number (DPV1 parameter)
IndexOffset 
Index (DPV1 parameter)
Length
Length of the data that is to be written
Data
In request: data that is to be written
 
 

C2 connection (MSAC-C2)

The C2 connection is as a rule intended for a second master (C2 master) that does not communicate with the slave cyclically, but it is also possible for the C1 master to make use of the C2 connection. In order for a slave to be able to use the C2 connection, the slave must support DPV1 (this means that the line "DPV1_Slave = 1" and the keyword "C2_Max_Data_Len" with an appropriate length must be in the GSD file).

The connection is automatically established by the master as soon as a Read, Write or Data_Transport access is requested; it can, however, also be explicitly established through an Initiate. When the connection is being established automatically, the master sends the Initiate parameters that have most recently been passed (see the description of Initiate), and initializes the Initiate parameters with 0 after a TwinCAT start (or restart); monitoring of the connection is an exception - this is initialized in accordance with the value set in the System Manager (Watchdog under DPV1 Class 2 on the slave's PROFIBUS tab).

It is also necessary for the C2 functionality to be activated for each slave that is to be addressed using C2 services by selecting the Enable check box under DPV1 Class 2 (see the slave's PROFIBUS tab).

If a different master performs cyclic data exchange with the slave, then the "No cyclic connection" setting must be chosen under DP Class 2 (see the slave's PROFIBUS tab). This could, for instance, be useful in order to be able to debug a BC3100/IL23xx-C310 over PROFIBUS, even though it is being operated by an external controller.

MSAC-C2-Read is mapped in ADS-Read, MSAC-C2-Write in ADS-Write, MSAC-C2-Data_Transport in ADS-ReadWrite, MSAC-C2-Initiate in ADS-ReadWrite, and MSAC-C2-Abort in ADS-Write:

 
 

MSAC-C2 Read

ADS-Read parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
0x100 + slot number (DPV1 parameter)
IndexOffset 
Index (DPV1 parameter)
Length
Length of the data that is to be read
Data
In response: data that has been read
 
 

MSAC-C2 write

ADS-Write parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
0x100 + slot number (DPV1 parameter)
IndexOffset 
Index (DPV1 parameter)
Length
Length of the data that is to be written
Data
In request: data that is to be written
 
 

MSAC-C2 Data_Transport

ADS-ReadWrite parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
0x100 + slot number (DPV1 parameter)
IndexOffset 
Index (DPV1 parameter)
Write-Length
Length of the data that is to be written
Read-Length
Length of the data that is to be read
Data
In request: data that is to be written; in Response: data that has been read
 
 

MSAC-C2 Initiate

The MSAC-C2-Initiate service allows the C2 connection to the slave to be established or, if it already exists, for new Initiate parameters to be passed.

ADS-ReadWrite parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
0x200 + slot number (DPV1 parameter)
IndexOffset 
0
Read-Length
Length of the Initiate Response parameter (6)
Write-Length
Length of the Initiate Request parameter (10 - 42)
Data
Initiate Request parameter or Initiate Response parameter

Initiate Request parameter

0x00 - 0x01
Feature_Supported
0x02 - 0x03
Profile_Feature_Supported
0x04 - 0x05
Profile_Ident_number
0x06
sType
0x07
sLen: Length of sAddr (0 - 16)
0x08
dType
0x09
dLen: Length of dAddr (0 - 16)
0x0A - 0x19
sAddr
0x1A - 0x29
dAddr

Initiate Response parameter

0x00 - 0x01
Feature_Supported (value received from slave)
0x02 - 0x03
Profile_Feature_Supported (value received from slave)
0x04 - 0x05
Profile_Ident_number (value received from slave)
 
 

MSAC-C2 Abort

The MSAC-C2 Abort service allows the C2 connection to the slave to be removed again.

ADS-Write parameters
Meaning
Net-ID
Net-ID of the master (see the device's ADS tab)
Port
0x1000 + station address of the slave
IndexGroup
0x400 + slot number (DPV1 parameter)
IndexOffset 
0
Length
Length of the Abort parameter (3)
Data
In request: Abort parameter

Abort parameter

0x00
Reason_Code
0x01 - 0x02
Additional_Detail