Communications Services - Siemens Simatic RTU303xC Series Operating Instructions Manual

The following groups of program blocks are available:
● Logical functions
Logical AND / OR, NOT (inverter), exclusive OR
● Timer functions
Delay blocks, pulse generator, timer block
● Analog value functions
Threshold value and comparator blocks, arithmetic functions etc.
● Counter and summation blocks
Counter, flow, summation and volume blocks
● Blocks for messages
Sending by SMS, e-mail and FTP
● Relay blocks
Latching relays, current impulse relays, wiping relays, time relays
● Other blocks
Block for changing the operating state
For a description of the program blocks, refer to the section Program blocks (Page 249).
1.6

Communications services

Interfaces for communication
With firmware version V1, the RTU supports communication via mobile wireless (WAN
interface).
As of firmware version V2, the RTU also supports communication via LAN, optionally with an
external router. For the following communications services the interface (LAN/WAN) can be
set separately: Telecontrol, e-mail, FTP, NTP.
As of firmware version V3, connections to an OpenVPN server (or SINEMA RC) can be
made via LAN or WAN.
Exception: Connections with DynDNS are always via mobile wireless.
You will find a selection of routers in the appendix Router SCALANCE M (Page 368).
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Application and functions
1.6 Communications services
25