PROFIBUS DP-Master

The Application Interface 290/315
6.3.15 PROFIBUS_DL_CMD_SET_VALUE_REQ/CNF - Set Value Service
This service sets a specific value within the variable set of the DL Layer.
The following system variables are available and supported by this packet:
1. Bus parameter
o
minT SDR
Indicates the smallest station delay response time. See section 4.2.3.5 “Min TSDR” for
detailed information. Allowed values range from 1 to 65535 ( = 2 16 -1).
2. Own Address
o
DL_ADDR
Indicates the own address of the Profibus DP master that can be changed only by this
method.
Note: Use this packet only when working with linkable object modules. It has not been
designed for usage in the context of loadable firmware.
Packet Structure Reference
#define PROFIBUS_DL_SET_VALUE_MINTDSR (0)
#define PROFIBUS_DL_SET_VALUE_DLADDR (1)
typedef struct PROFIBUS_DL_SET_VALUE_REQ_Ttag
{
TLR_UINT8 bVlu; /* Value to be set */
union {
TLR_UINT16 usMin_TSDR;
TLR_UINT8 bDl_Add;
} un;
}
PROFIBUS_DL_SET_VALUE_REQ_T;
/* Request-Packet for setting a DL value */
typedef struct PROFIBUS_DL_PACKET_SET_VALUE_REQ_Ttag
{
TLR_PACKET_HEADER_T tHead;
PROFIBUS_DL_SET_VALUE_REQ_T tData;
}
PROFIBUS_DL_PACKET_SET_VALUE_REQ_T;
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010