The available synchronization sources are:
• GPS: A GPS connected to a serial port. The time received from the GPS is used to set the
system’s clock and the RTC.
• SNTP: A SNTP source through Ethernet. CPU modules can operate as an SNTP client or as
an SNTP server.
• Protocol: Most control protocols allow synchronizing slave devices.
• Console: The user can set the system's time manually from the console terminal.
• IRIG-B: It’s possible to configure the CPU as a server and/or client. The communication always
will be made with IRIG-B compliant devices.
If the synchronization source is not configured, the console device will always be created by
default. The console operates as the lowest priority when another source is configured.
CPU Communications
Saitel DP supports the following communication protocols with field devices:
• IEC101 master and slave.
• IEC103 master.
• IEC104 master and slave.
• DNP 3.0 master and slave.
• Modbus master and slave.
• IEC61850 client, Edition 1 and 2.
• IEC61850 server, Edition 1 and 2.
• TSV Devices
I/O Acquisition
The CPU manages the information exchange with the I/O modules. This information is sent from
the acquisition module to the CPU through the bus.
The software in the CPU adds the following features:
• Processing I/O information, which offers an added value to the information from field.
• Accessing the internal bus to exchange information with the I/O modules.
Real-time Database (coreDb)
The core of the Baseline Software Platform is the real-time database or coreDb. It is a real-time
database which stores not only the information acquired from field devices, but also the information
about the status of the CPU modules and I/O modules included in the RTU.
coreDb also relates the acquisition signals to the communication protocol signals. This database is
generated in the CPU by using the configuration information.
The information which is received from field in real time is processed, stored in the coreDb and
then related to the communication protocols signals of the RTU, which function is to transfer that
information to the master device.