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Startup behavior of the RTU
During startup the RTU behaves as follows:
● The LED "STATUS" flashes green.
● If an SD card is plugged in, the RTU searches for the configuration data stored on the
card.
– When it has found the configuration data on the card, the RTU reads in the
– If the configuration data is not found on the card, the RTU uses the configuration data
● The RTU changes to update mode:
– All connected and configured inputs are read.
– The read data is processed if programmed.
– The data is saved.
– The outputs are updated if programmed.
● If communication is configured and the requirements for data transfer are met, the RTU
connects to its communications partner for the first time.
The following requirements must be met:
– The inputs are configured, refer to the section Tags (Page 149).
– The tags are processed by the program, refer to the section Programming (Page 195).
– The data points have been created, refer to the section Telecontrol (Page 169).
– The RTU has a connection to the mobile wireless network, refer to the section LEDs
● When the data transfer is complete, or if no communication is configured, the RTU
changes to sleep mode.
Checking the antenna position
If the RTU is in communication mode, based on the signal strength displayed in the WBM,
you can check the optimum alignment of the antenna in different positions. For more on the
display of the signal strength refer to the section Wireless cell (Page 115).
RTU3030C
Operating Instructions, 09/2017, C79000-G8976-C382-04
configuration data.
in its internal memory.
If the RTU does not find any configuration data in its internal memory it remains in
service mode. The STATUS LED flashes red.
(Page 40) (wireless status LEDs) or via the LAN interface and an external router, the
RTU has access to the Internet.
Connecting up, installation, commissioning
3.8 Commissioning and starting up the RTU
69
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