Checking the SPI 3 for correct operation
ASCII | 3964R | RK512
14
Checking the SPI 3 for correct operation
Several checks should be made before using the SPI 3 to transfer data.
Checking the SPI 3 power feed
– At this stage, do not attach either the PROFIBUS interface or the serial interface,
– switch on the power feed for the SPI 3.
The RUN LED should light continuously. If this is not the case, there is a fault in the 24 V
power feed. Refer to »Error diagnosis and remedies« on page 24 for details of how to lo-
cate the fault.
Checking the PROFIBUS communication
– Connect up the PROFIBUS interface cable,
– switch on the power feed for the SPI 3,
– start the DP master, which has been configured previously (see »example project Test«
on page 13).
The PB LED should light continuously. If this is not the case, there is an error in the
PROFIBUS communication. Refer to »Error diagnosis and remedies« on page 24 for de-
tails of how to locate the fault.
Checking the serial interface communication
– Connect up the PROFIBUS interface cable and the serial interface cable,
– switch on the power feed for the SPI 3,
– start the DP master, which has been configured previously,
– start the communication with the serial device.
The RUN LED should light continuously. If it does not light, or it only flashes, there is an
error in the communication with the serial device. Refer to »Error diagnosis and reme-
dies« on page 24 for details of how to locate the fault.
If no errors were detected, the SPI 3 is ready for use and you can use it for transferring
data.
The TX LED should flash when data is being transmitted over the serial interface and the
RX LED should flash when data is being received over the serial interface (see »Indicat-
ing elements« on page 7).
