DPV1 Interface
By default, one MSAC_C1 connection and one MSAC_C2 connection with 52 bytes of data (4 bytes DPV1 header plus 48 bytes of user data) are supported. The MSAC_C1 connection is established along with cyclic connection, and can be activated via the UserPrmData:
Byte | Bit | Value: Description |
|---|---|---|
0 | 7 | 1: MSAC_C1 connection is activated |
The MSAC_C2 connection can be used either by the C1 master (which communicates with the slave cyclically) or by a C2 master (which then only communicates with the slave acyclically), and has its own establishment of connection. The parameters at the establishment of the MSAC_C2 connection (Feature_Supported, Profile_Feature_Supported, Profile_Ident_Number, etc.) are not examined, and the parameters of the request are mirrored in the response.
Slot_Number = 0 addresses PROFIBUS coupler data, Slot_Number > 0 addresses the data of the function module(s).
PROFIBUS coupler data (Slot_Number = 0)
The data associated with the PROFIBUS coupler is addressed via an index:
Index | Access | Description |
|---|---|---|
1-2 | R/W | |
5 | R | |
9-19 | R/W | Device configuration (Table 9) |
90 | R | K-bus status (Table 90) |
98 | R/W | |
99 | W | Commands: local bus reset, starting or stopping the internal cycle time measurement |
Function module data (Slot_Number > 0)
Depending on the type of function module, access is made either to the registers (max. 4 channels, each with 64 registers) or to the parameters (only supported by a few function modules, where the quantity of data is insufficient for the register model)
Accessing registers
Index | Access | Length | Description |
|---|---|---|---|
0-63 | R(/W) | 2 | Registers 0-63 of the channel 1 in the function module |
64-127 | R(/W) | 2 | Registers 0-63 of the channel 2 in the function module |
128-191 | R(/W) | 2 | Registers 0-63 of the channel 3 in the function module |
192-254 | R(/W) | 2 | Registers 0-63 of the channel 4 in the function module |
Accessing parameters
Index | Access | Length | Description |
|---|---|---|---|
0 | R(/W) | 4-32 (must be divisible by 4) | Parameters 0x0000-0x0007 of the function module |
1 | R(/W) | 4-32 (must be divisible by 4) | Parameters 0x0008-0x000F of the function module |
... | ... | ... |
|
127 | R(/W) | 4-32 (must be divisible by 4) | Parameters 0x03F8-0x03FF of the function module |