10.1 Tolerances / Specications
10.1.1
Specications of the Real Time Clock
Resolution: 1 ms
Tolerance: <1 minute / month (+20°C [68°F])
<±1ms if synchronized via IRIG-B
Time Synchronization Tolerances
The dierent protocols for time synchronisation vary in their accuracy:
Used Protocol Time drift over one
month
Deviation to time generator
Without time
synchronization
<1 min (+20°C) Time drifts
IRIG-B Dependent on the time drift
of the time generator
<±1 ms
SNTP Dependent on the time drift
of the time generator
<±1 ms, if network connection is
GOOD (see operation status of SNTP)
Modbus TCP Dependent on the time drift
of the time generator
Dependent on the network load
Modbus RTU Dependent on the time drift
of the time generator
<±1 ms
DNP3 TCP Dependent on the time drift
of the time generator
Dependent on the network load
DNP3 UDP Dependent on the time drift
of the time generator
Dependent on the network load
DNP3 RTU Dependent on the time drift
of the time generator
<±1 ms
Note that the availability of the protocols depends on the ordered variant of the
EMR-3MP0 (see ╚═▷ “Catalog Codes for the EMR-3MP0”).
244 www.eaton.com EMR-3MP0
10 Technical Data EMR-3MP0
10.1 Tolerances / Specications