Kuhnke Electronics Instruction Manual
Kuhnke Electronics Instruction Manual
Kuhnke Electronics Instruction Manual
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6.2.2 Receive Parameter Data (Prm_Data)<br />
PROFIBUS<br />
The parameters of passive stations (slaves) are set during<br />
DP system startup. The master transmits all parameter<br />
data to the DP slave (here: Ventura Remote PLC DP).<br />
The master is also allowed to send/change parameter<br />
settings during operation.<br />
The first 7 bytes (octets 1...7) contain the general bus<br />
parameters. They are obligatory for all DP slaves and<br />
generally supported by the usual configuration tools.<br />
Starting with byte 8, you can transmit device-specific<br />
parameters. These parameters deserve special attention<br />
because they affect the functions of the unit concerned.<br />
6.2.2.1 General Bus Parameters<br />
Octet 1: Station_status<br />
See EN 50170, "Parameter Data Transmission" for details<br />
Octet 2: WD_Fact_1<br />
Range: 1...255<br />
Octet 3: WD_Fact_2<br />
Range: 1...255<br />
Octets 2 and 3 use the following equation to define the<br />
response monitoring timeout (watchdog time, TWD):<br />
TWD [s] = 10 ms * WD_FACT_1 * WD_FACT_2<br />
This allows you to set times between 10 ms and 650 s<br />
that are entirely independent of the baud rate. When the<br />
watchdog control reacts the unit reports the event as error<br />
no. 3 (� section 8.3.3).<br />
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