Network Planning Considerations - SKF On-line System WVT User Manual

Setting Up the Network

Network Planning Considerations

Network Planning Considerations
Wireless Communications
• ISA100.11a protocol
• IEEE 802.15.4 radio
• Typically in the plant, the range is:
CMWA 7910-FCC/IC 300 m (984 ft.)
CMWA 7910-ETSI 100 m (328 ft.).
The actual range depends on specific site topology and device placement.
SKF Multilog WVT Capacity Specifications Within a Network
Bear in mind the capacity specifications of the SKF Multilog WVT device within
networks, which are summarized in the table below.
Maximum number of SKF Multilog WVT Field Devices
connected to an Access Point (Ethernet wired to FDN)
Maximum number of SKF Multilog WVT Field Devices
connected to an FDAP Router (wireless)
Maximum number of SKF Multilog WVT connected under
an SKF Multilog WVT acting in a Field Router role (the
routing SKF Multilog WVT must be a Line powered unit).
The network could be a linear 4-hop network or a star
network.
WARNING! The WDM web page permits you to enable
routing on a battery powered device, but doing so causes
the battery level calculation to be inaccurate. Enabling
routing will produce an irreversible error in the battery
level calculation until the batteries are replaced with a new
pair.
Maximum number of SKF Multilog WVT Field Devices
connected to a WDM
Maximum number of wireless network hops between an
access point and a field device
Maximum time for radio firmware upgrade for SKF Multilog
WVT
Maximum time for application upgrade for SKF Multilog
WVT
The maximum number of SKF Multilog WVTs for each of the routing devices in the table
above are accumulative. For example, with two wireless FDAPs that each support the
maximum of seven SKF Multilog WVTs, the wired access point could support an
additional single wireless SKF Multilog WVT (7+7+1=15).
4 - 2
15 SKF Multilog WVT Field Devices
7 SKF Multilog WVT Field Devices
3 SKF Multilog WVT Field Devices
30 SKF Multilog WVT Field Devices
4 hops
Dependent on bandwidth availability and
number of hops:
10 minutes (1 hop) to 90 minutes
Dependent on bandwidth availability and
number of hops:
40 minutes (1 hop) to 4 hours
SKF Multilog On-line System WVT
User Manual