A PROFIBUS DP slave can be added by right-clicking on “Profibus_Master_x (Profibus_Master)” and selecting “Add object”.
If the desired device is not listed it can be installed via the “Device Repository” (menu item “Tools” -> “Device Repository”).
The slave configuration parameters can be edited in slave related editor window. To open this editor window, double-click the corresponding slave in the device tree.
Click on tab “General” if not already opened.
All times for the PROFIBUS parameters are given in bit time [tBit]. The bit time is the result of the reciprocal of the transmission rate:
tBit = 1 / transmission rate in [bit/s]
The conversion from milliseconds into a bit time is shown in following formula:
tBit = Time in [ms] * transmission rate in [bit/s]
The following parameters are available:
|
Parameter |
Default |
Value |
Description |
Parameter (Remark 1) |
|---|---|---|---|---|
|
Identification |
||||
|
Station address |
1 |
0 ... 126 |
Station address of the PROFIBUS DP slave device. |
StationAddress |
|
Ident number |
GSD file specific |
---- |
Ident number of the PROFIBUS DP slave device. |
SlavePrmData -> identNumber |
|
Parameter |
||||
|
T_SDR (tBit) |
11 |
11 ... 255 |
The parameter T_SDR (tBit) represents the minimum station delay of a responder (time a responder waits before generating the reply frame). |
SlavePrmData -> minTsdr |
|
Lock/unlock |
2 (Lock) |
0 (T_SDR unlock) |
The TSDR and slave-specific parameter may be overwritten. |
Bit 6 = 0 and bit 7 = 0 of bitmask SlavePrmData -> stationStatus |
|
1 (Will be unlocked) |
The slave is released to other masters. |
Bit 6 = 1 and bit 7 = 0 of bitmask SlavePrmData -> stationStatus |
||
|
2 (Lock) |
The slave is locked to other masters, all parameters are accepted. |
Bit 6 = 0 and bit 7 = 1 of bitmask SlavePrmData -> stationStatus |
||
|
3 (Unlock) |
The slave is released to other masters. |
Bit 6 = 1 and bit 7 = 1 of bitmask SlavePrmData -> stationStatus |
||
|
Watchdog |
||||
|
Watchdog control |
Enabled |
Disabled |
The PROFIBUS Slave does not utilize the Watchdog Control Time setting. |
SlavePrmData -> wdFact1 |
|
Enabled |
The PROFIBUS slave utilizes the Watchdog Control Time setting in order to detect communication errors to the assigned Master. When the Slave finds an interruption of an already operational communication, defined by a Watchdog time, then the Slave carries out an independent Reset and places the outputs into the secure condition. |
|||
|
Time (ms) |
400 |
0 ... 2540 |
Watchdog time in [ms]. The default value depends on the number of slaves attached to the master and their configuration. |
SlavePrmData -> wdFact2 |
|
User parameter |
||||
|
Symbolic values |
Enabled |
Disabled |
No symbolic names for the user parameters. |
- |
|
Enabled |
The values for the parameters are shown with symbolic names. |
- |
||
|
Length of user parameter (Byte) |
3 |
Device-specific |
The length of the user parameters in [bytes]. By default this value is 3 due to the existing reserved values. |
- |
|
Defaults |
- |
- |
The button restores the default values of the user parameters. |
- |
Remark 1:
To display the parameters of this column, enable the option “Show generic device configuration views” under “Tools Options Device editor”.
Click on tab “Check configuration”.
Following dialog shows values for input/output/parameter data occupied by your configuration. Here it can be checked how much data is left for further configuration.
