Parker AC30 Série Mode D'emploi page 191

The following attributes are used to determine the best master clock. They are listed in order of precedence.
Attribute
priority1
clockClass
clockAccuracy
offsetScaledLogVariance
priority2
clockIdentity
AC30 series Variable Speed Inverters
Description
Lower values of Priority1 take precedence.
Used to define a clock's TAI traceability.
Indicates the expected accuracy of a clock. Given
as an enumerated value.
This defines the stability of the clock.
Lower values of Priority2 take precedence.
The clockIdentity identifies a clock. The
clockIdentity is an 8-octet identifier created from the
Ethernet MAC address in the format:
First 3 octets – most significant octets of MAC
address
Next 2 octets – have values FFh and FEh
respectively
Last 3 octets – least significant octets of MAC
address
The clockIdentity is used as a tie-breaker for the
master clock.
Ethernet
Inverter Default Value Modified by parameter
128 -
248 or -
255 (slave only)
FEh -
FFFFh -
(not computed)
128 1686 PTP Priority2
- 0920 MAC Address
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