Siemens Simatic RTU303xC Series Operating Instructions Manual page 174

Configuration (WBM)
4.18 Operating mode
● After battery operating time of:
If the option is enabled, a message is sent when the configured value of the operating
time of the active battery module is reached after being activated by the RTU.
● Runtime (days)
Enter a value for the number of days after which the message is sent.
If you enter 0, the function is deactivated.
● Text
Here, select the text for this message.
Configure the text in "Tags" > "Texts"
● After battery changeover
This option only makes sense when using two battery modules.
If the option is enabled, a message is sent when the RTU changes from one battery
module (including optional expansion modules) to the other battery module. The RTU
changes from the active module to the second battery module (substitute module) when
the voltage value of the active module sinks below the critical threshold value.
The advantage of this is that the active module can be completely emptied before
switching to the second battery module and a message being sent. After sending the
message there is normally enough time for a battery change and the capacity of the
batteries is used to the best effect.
● Text
Here, select the text for this message.
Configure the text in "Tags" > "Texts"
Changing batteries
Note
Battery type
Only use the batteries described in the Appendix of the manual. Correct battery operation is
only ensured with these battery types.
Changing both batteries
Always replace both batteries of a battery holder with new batteries.
If you only replace one battery this can destroy the new battery. In this case, correct battery
operation of the RTU could not be guaranteed.
Changing all batteries of a module
If you add one or two battery expansion modules to a battery module, we strongly
recommend that you replace all batteries of a unit (battery module + battery expansion
modules).
174
Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC