Siemens SIMATIC RTU3030C Operating Instructions Manual page 21

● Cyclic interruption of the sleep mode to fetch a wake-up SMS (WBM > "Operating mode")
● Occurrence of certain events:
– Creating a new log file with a configured change to the communication mode to
– Further events, refer to the section "Update mode".
In the "TeleControl" mode, the RTU in sleep mode has the greatest energy-saving potential
when using the "TeleControl Basic" protocol.
Update mode
The update mode is controlled by the configurable update cycle, refer to the section
Operating modes (Page 138).
In the Update mode, the RTU runs through the following steps:
● Reading the inputs configured for the current cycle.
● Processing of the program blocks
● Writing the outputs
● Saving the process data in the send buffer when telecontrol communication is enabled
● Saving the process data data on the SD card (with Logging activated)
After updating, the RTU returns to sleep mode, or changes to the communication mode if
this is configured. The update cycle and communication cycle can also run independently of
each other.
In addition to the configured update cycle, the RTU changes from the sleep mode to the
update mode when configurable events occur. The following events can be configured:
● Value change at the analog input "AI0"
● Edge change at a digital input
● Triggering of timers of program blocks, for example with a pulse generator or with the
on/off delay.
Note that configured events lead to higher current consumption.
Communication mode
In the Communication mode, the RTU performs the following tasks:
● Activating the internal mobile wireless modem or the LAN interface and an external router
(via configurable control outputs of the RTU)
● Sending the data messages to the configured communications partner in the master
station
● Sending stored messages / data (SMS messages, e-mails, FTP file transfer)
● Synchronization of the time of day if configured.
● Diagnostics
In addition to the tasks listed above, in the communication mode a connection can be
established to the WBM of the RTU by the telecontrol server or the configuration PC. This
makes diagnostics of the RTU and maintenance work possible.
RTU3030C
Operating Instructions, 09/2017, C79000-G8976-C382-04
transfer the old log file
Application and functions
1.3 Modes and operating modes
21