PROFIBUS DP-Master

Getting started / Configuration 56/315
4.2.3 Detailed Description of Bus and Master Parameters
Both the bus and the master need to be configured. The accurate choice of the bus parameters is the
foundation of correctly operating data exchange on the Profibus network.
The following table contains relevant information about the bus parameters (including the master’s
parameters) for the PROFIBUS DP-Master firmware such as a short explanation of the meaning of the
parameter and ranges of allowed values:
Parameter Meaning Range of Value / Value
Bus_Para_Len Contains the length of the Bus_Para including the field 34
Bus_Para_Len itself
FDL_Add Contains the own address of the PROFIBUS Device 1-125
Baud_rate Contains the transmission speed 0-11
T SL Slot-time 37-16383
Min T SDR Min. station delay responder 1-1023
Max T SDR Max. station delay responder 1-1023
T QUI Quiet time 0-127
T SET Setup time 1-255
T TR Target rotation time >= 255
G Gap update factor 1-255
HSA Highest station address 1-126
Max_Retry_Limit Retries if error occurs 1-15
Bp_Flag See separate explanation below 0-255
Min_Slave_Interval Minimum Slave Interval Time 0-65535
Poll_Timeout Class2 Poll timeout 0-65535
Data_Control_Time Data Control Time 1-65535
Alarm_Max Maximum Alarms 7-32
Max_User_Global_C
ontrol
Reserved
Master_User_Data_L
en
Master_Class2_Nam
e[32]
Master_User_Data[32
]
T CL
Max_T SH
Maximum allowed parallel active USER Global Control
Commands
4 reserved octets
1-255
Contains the length of the USER Master data 0-32
Name of the Master Class 2 (currently not used)
USER specific Parameter data 0-32
Isochronous cycle time
Maximum Shift Time
Table 25: Bus and Master Parameters, their Meanings and their Ranges of allowed Values
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010