TPU2000/2000R Modbus/Modbus Plus/ Modbus TCP/IP Automation Guide
34
74 73 72 71 70 69 68 67 66 65
AUX COM PORT
IRIG B
SOURCE
TPU2000
Com 3
55 56 57 58 59 60 61 62 63 64
AUX COM PORT
DPU2000R
Com 3
55 56 57 58 59 60 61 62 63 64
AUX COM PORT
GPU2000R
IRIG B Negative (to Source Terminals)
IRIG B
Positive
(to Source Terminals
Shield At Ground (one point only)
Figure 4-14. Pin to Pin Illustration of ABB Protective Daisychain Link for IRIG B
SIMPLE NETWORK TIME PROTOCOL
Simple Network Time Protocol (SNTP) is a UDP ( User Datagram Protocol) for Ethernet allowing accurate and
synchronized time across a TCP/IP ( Ethernet) connection. SNTP is derived from a more complex NTP protocol (
Network Time Protocol. SNTP differs from NTP in that some server-based time synchronization algorithms are
not imbedded which would be more applicable for server applications. Simple Network Time Protocol can
operate in a few ways:
• Client Server Basis, Unicast
• Peer To Peer Mode
• Broadcast/Multicast Basis ( address 224.0.1.1 for SNTP and NTP)
SNTP is based upon the international time standard UTC (Universal Time Coordinated) which is an official and
international standard for workd time. UTC is an evolved form of GMT ( Greenwich Mean Time) which was a
world standard. UTC is used because from a single universal time, one can convert the UTC to a local time by
adding or subtracting hours based upon a local time zone.
SNTP is based upon RFC 2030 which replaced similar obsolete RFC’s 1305, and 1769. SNTP uses UDP port
9000. If the DPU 2000R is updated with Version 1.20 COM ROM Firmware (Ethernet Option) and Version 6.00
CPU Version Firmware, SNTP time synchronization will be available.
Time Synchronization Parameterization Using WINECP Software Configuration
Physical interconnection of the devices is only one part of the procedure to allow Time Synchronization via IRIG B
or SNTP. The ABB protective relays must be configured to enable Time Synchronization. The procedure follows:
1. Start WinECP for the appropriate device being configured.
2. Highlight the Change Settings Menu.
3. Highlight and Select the Communications Menu. Depending upon the TPU 2000R or 2000 IED, the
screens depicted in Figure 4-15 or 4-16 will be depicted.
To Next Page
Loading...
Need help?
General
