Time Setting And Synchronization; General Interrogation; Monitoring Functions - Siemens CP-8000 User Manual

Function Packages
3.1.7.2

Time Setting and Synchronization

For time setting and synchronization, the following possibilities are available:
·
Time setting and synchronization via serial communication
·
Time setting and synchronization via LAN/WAN (NTP)
NTP/SNTP Client
Up to 4 different NTP servers can be parameterized for the time setting. The time for the syn-
chronization is determined via a defined algorithm from the received times of the NTP servers.
Integrated NTP Server
With the integrated NTP server time can be provided to further devices via LAN communica-
tion lines.
3.1.8

General Interrogation

During startup and after errors in the system (communication errors, FIFO overflow events),
the automation units involved ensure that operations are resumed automatically in a coordi-
nated manner.
This means that the communication connection is established and all data concerned as well
as relevant system information are transferred from their source all the way to their sink, in or-
der to update the process images throughout the system (taking a multi-hierarchical network
into account). This is done by prompting a general interrogation of the respective portion of
the automation network where the error has occurred.
3.1.9

Monitoring Functions

Monitoring of an automation unit
·
Functionality of the processor and of the memories (periodical test of the program, data,
and parameter memories, as well as watchdog function)
·
Internal communication capability (periodical internal test messages with monitoring func-
tion)
·
Data integrity (internally secured data transmission with parity, plausibility check at the in-
ternal interfaces, identification of data of failing modules)
·
Information loss due to a buffer overflow
·
Correctness of internal workflow sequences
Monitoring of system environment
·
Plausibility of process states
·
Plausibility of process sequences
·
Availability of process circuits
Monitoring of communication
·
Functionality (periodical call messages with monitoring function, monitoring of transmis-
sion quality)
·
Data integrity (secured transmission, identification through failure of data concerned)
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