System and setting requirements
- Support for the IEEE 1588 v2 time synchronization
- Preferably IEEE 1588 v2 according to the Power Profile and implementation according to the one-step mode
- All network devices between the IEEE 1588 v2 clock master and the IED must support IEEE 1588 v2
Ethernet switch requirements
- Support for the IEEE 1588 v2 transparent-clock operation mode to enable accurate time synchronization in the system
- Preferably managed switch capabilities for SMV filtering and VLAN to restrict the flow of SMV only to devices using it
In order to get maximum throughput, we recommend that the Ethernet Switches which are supporting hardware time stamping for PTP IEEE 1588 V2 are used.
ABB Ethernet Switches such as AFS 665/677 are good choices to get full functionality out of SSC600 devices. AFS660 can be used too but it doesn't have gigabit ports so the fiber optic card of SSC600 cannot be used. E.g. AFS675 is not supporting hardware time stamping so it is not recommened to use with SSC600.
ABB AFS677 Ethernet Switch is tested in our factory lab and it supports 20 SMV streams very well with IEEE 1588-time synch.
AFS677 switch time sync in details:
- PTP IEEE 1588 v1/v2 Boundary and Transparent Clock hardware time stamping with accuracies of 30ns
- IEEE 1588 Power Profile (C37.238-2011)
- SNTP server e.g. for COM600
Realtime clock with energy buffer.
Summary:
The following switches support PTP with HW time stamping.
- AFS677
- AFS660/665-S
- AFS660-C
AFS650/655 and AFS670/675 support ‘PTP simple mode’ only, i.e. they can derive the local time from PTP signal, but they don’t support Boundary Clock or Transparent Clock function (i.e. they have no HW timestamp) See the table below.
It is hereby stated that the below listed ABB products are in accordance with the corresponding Hirschmann versions.
- ABB naming -> Hirschmann naming
- AFS650-xxx -> RSR20-xxx
- AFS655-xxx -> RSR30-xxx
- AFS670-xxx -> MACH1020-xxx
- AFS675-xxx -> MACH1030-xxx
- AFS677-xxx -> MACH1040-xxx
- AFF650-xxx -> EAGLE20-xxx
- AFF 660/65xx -> EAGLE30-xxx
- AFS660-Cxx -> RSPS2x-xx
- AFS660-Sxx -> RSP20-xx
- AFS665-Sxx -> RSP30-xx
- AFS660-Bxx -> RSPL20-xx
- AFS665-Bxx -> RSPL30-xx
| Type | Manufacturer | Assembly | Number of ports | HSR Redbox | PRP Redbox | RSTP | SNTP | PTPv2 | Station bus | Process bus |
|---|---|---|---|---|---|---|---|---|---|---|
| AFS670 | ABB | 19' | up to 24 | No | No | Yes | Yes | No | Yes | No |
| AFS675 | ABB | 19' | up to 28 | No | No | Yes | Yes | No | Yes | No |
| AFS677 | ABB | 19' | 16 | No | No | Yes | Yes | Yes | Yes | Yes |
| AFS660B | ABB | DIN Rail | 8 | No | No | Yes | Yes | No | Yes | No |
| AFS665B | ABB | DIN Rail | 10 | No | No | Yes | Yes | No | Yes | No |
| AFS660C | ABB | DIN Rail | 6 | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| AFS660S | ABB | DIN Rail | 6 | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| AFS665S | ABB | DIN Rail | 11 | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
In addition to the above switch models, the following switches has been used successfully in ABB test environment:
- RUGGEDCOM RST2228
- RUGGEDCOM RS950G
- Cisco IE4010
- Moxa PT-G7728
- Moxa EDR-G9010
IEEE 1588 v2 master clock requirements
- Support for IEEE 1588 v2 Grand Master operation mode
- Clock accuracy of ±1 μs or better to enable accurate enough sampled measured values
Accurate time synchronization is essential for working centralized protection and control system. Here is a reference list of GPS clock masters, that ABB has used successfully together with SSC600:
- Meinberg Lantime M3000 (GPS)
- MEINBERG LANTIME M600/GPS
- Meinberg LANTIME M1000
- Tekron NTS 03-G+
- TTM 01-G
More GPS clocks will be added as soon as there is a reference that they work reliably with the SSC600 system.