Enabling The Terminating Resistor - Endress+Hauser Proline Cubemass C 100 PROFIBUS DP Operating Instructions Manual

Proline Cubemass C 100 PROFIBUS DP
Endress+Hauser
Setting the address
OFF ON
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 11 Addressing using DIP switches on the I/O electronics module
1. Depending on the housing version, loosen the securing clamp or fixing screw of the
housing cover.
2. Depending on the housing version, unscrew or open the housing cover and
disconnect the local display from the main electronics module where necessary
→  121.
3. Disable software addressing via DIP switch 8 (OFF).
4. Set the desired device address via the corresponding DIP switches.
 Example →  11,  33: 1 + 16 + 32 = device address 49
The device demands rebooting after 10 s. After rebooting, hardware addressing
is enabled with the configured IP address.
5. Reverse the removal procedure to reassemble the transmitter.
7.5.2

Enabling the terminating resistor

PROFIBUS DP
To avoid incorrect communication transmission caused by impedance mismatch, terminate
the PROFIBUS DP cable correctly at the start and end of the bus segment.
• If the device is operated with a baud rate of 1.5 MBaud and under:
For the last transmitter on the bus, terminate via DIP switch 2 (bus termination) and DIP
switch 1 and 3 (bus polarization). Setting: ON – ON – ON →  12,  34.
• For baud rates > 1.5 MBaud:
Due to the capacitance load of the user and the line reflections generated as a result,
ensure that an external bus terminator is used.
It is generally advisable to use an external bus terminator as the entire segment can
fail if a device that is terminated internally is defective.
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32
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- Software addressing
- Write protection
- Not used
Electrical connection
A0021265
33