214 Rockwell Automation Publication 1426-UM001J-EN-P - August 2019
Chapter 8 Other Functions
Setup
The Network Time Synchronization set up parameters for SNTP and PTP are 
found in the Configuration.Communications_Native
 table on page 296.
Time Zones
Table 29 - Network Time Synchronization Set up Parameters
Parameter Description Range Default
Time_Sync_Source Selection for Time Sync 
0 = Disable
1 = SNTP
2 = PTP_Slave
3 = PTP_Master
0…2 2
SNTP_Mode_Select 0 = Unicast 
1= Anycast Mode 
The SNTP address is a broadcast address of an anycast group
0…1 0
SNTP_Update_Interval Number of seconds before next update 1…32766  300
SNTP_Time_Zone The time zone in which the power monitor is located 0…32 6 (Central Time)
SNTP Time Server IP Unicast server or anycast group IP address in format aaa.bbb.ccc.ddd 0.0.0.0…255.255.255.255 0.0.0.0
QOS_DSCP_Enable 0 = Disable
1 = Enable
0…1 1
QOS_DSCP_PTP_Event PTP (IEEE 1588) event messages 0…63 59
QOS_DSCP_PTP_General PTP (IEEE 1588) general messages 0…63 47
QOS_DSCP_Urgent CIP transport class 0/1 messages with Urgent priority 0…63 55
QOS_DSCP_Scheduled CIP transport class 0/1 messages with Scheduled priority 0…63 47
QOS_DSCP_High CIP transport class 0/1 messages with high priority 0…63 43
QOS_DSCP_Low CIP transport class 0/1 messages with low priority 0…63 31
QOS_DSCP_Explicit CIP UCMM CIP class 3 0…63 27
Table 30 - Time Zone Information
Value Offset 
from GMT
Time Zone Name Areas in Time Zone
0 GMT-12:00 Dateline Standard Time Eniwetok, Kwajalein
1 GMT-11:00 Samoa Standard Time Midway Island, Samoa
2 GMT-10:00 Hawaiian Standard Time Hawaii
3 GMT-09:00 Alaskan Standard Time Alaska
4 GMT-08:00 Pacific Standard Time Pacific Time (US and Canada; Tijuana)
5 GMT-07:00 Mountain Standard Time Mountain Time (US and Canada)
US Mountain Standard Time Arizona
6 GMT-06:00 Canada Central Standard Time Saskatchewan
Central America Standard Time Central America
Central Standard Time Central Time (US and Canada)
Mexico Standard Time Mexico City