7.4.4 Time synchronization for time stamping
Requirements
The following requirements apply to the time synchronization for time stamping:
● There must be a time-of-day master, e.g. SICLOCK TM, available in the automation system
that operates with a synchronization interval of 10 s.
● The time-of-day frame must be passed via the PROFIBUS DP interface of the CPU.
● A synchronization interval of 10 s must be assigned for the IM 650.
Time synchronization for high-precision time stamping with 1 ms accuracy
You must realize the time synchronization for the high-precision time stamping with the
following hardware components and settings:
● Time-of-day master: SICLOCK TC 400 with GPS synchronization
Parameters to be set for SICLOCK TM:
Path / tab Parameter
(with number from the SI‐
CLOCK parameter menu)
Value
Synchronization /
Redundancy
Synchronization Mode (218) Ramp
Step pos. (219) Micro step
Step neg. (220)
Inputs Input general Input type (230) DCF
Input E1 E1 active / passive TTY passive
DCF alarm (239) 5
Ethernet LAN general LAN timeout (349) 0.5 s
LAN 1-5 Adr1 protocol (e.g. 350) Layer 2 - S5
Adr1 send (e.g. 351) 10 s
Adr1 def. (e.g. 352) broadcast
Adr1 is given as an example. Other LAN‑connections / addresses have other
parameter numbers accordingly.
LAN extra SNTP server (550) Off
● Ethernet: CP 443‑1; 6GK7443‑1EX30‑0XE0
Parameters to be set for Ethernet CP:
Parameter Value
Forward time from LAN to station
Switch on the time synchronization in SIMATIC procedure
● CPU 410:
Parameters to be set for the CPU:
Functions
7.4 Time stamping of the input signals with IM 650
ET 200PA SMART
78 Operating Instructions, 06/2019, A5E34192013-AB
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