Siemens SICLOCK TC 400 - Manual (Page 78)

Parameterization
9-76 © Siemens AG 2007 All Rights Reserved
SICLOCK ® TC 400
9.1 Linking the external synchronization
The external synchronizations can be linked via Ethernet as NTP server and/or
as radio clock via point-to-point connections to the SICLOCK TC 400.
Prerequisite for operation is at least one external synchronization. Additional
external synchronization can be used as substitute synchronizations if a fault
occurs, see Redundancy (Section 2.6).
External synchronizations can be GPS or DCF77 radio clocks, cabled distribution
systems, atomic clocks or other signal sources.
Further information
Synchronization (Section 9.3.2).
9.1.1 Radio clocks via terminals
Only two radio clocks can be connected at the same time, see also Terminal
assignment (Section 15.1).
Certain redundancy mechanisms enable an automatic switchover to the second
radio clock when a fault occurs, see Redundancy (Section 9.1.3).
Monitoring
The /Inputs/Input 1/Monitoring (0.20.01) parameter for radio clock 1 or the
/Inputs/Input 2/Monitoring (0.21.01) parameter for radio clock 2 can be used to
monitor the input signal of the radio clocks and after expiry of the monitoring time,
an alarm or a warning output.
Status display
See Connecting the external synchronization (Section 6.3).
Serial formats
The /Inputs/Input 1/Framing (0.20.03) parameter displays the automatically
detected framing for serial formats.
There are entries for baud rate, data bits, parity and stop bits.