The AMS Wireless SNAP-ON application can check the active wireless network against recommended practices and highlights recommendations that are not met. The wireless recommended practices are based on IEC 62591 WirelessHART System Engineering Guide.
The guidelines are:
- It is recommended that wireless networks are centered around a single process unit. This helps maintain a degree of cohesiveness among the devices attached to a gateway and can help ensure that any process upsets do not affect multiple networks.
- The gateway should have a minimum number of neighbor devices within range.
- The gateway should have a minimum percentage of the devices in the network within range.
- There should be no devices that do not have a potential path back to the gateway (either directly or through other devices in the network). If the network is a fast network, the minimum percentage of devices required to be in range of the gateway is increased to 50 percent.
- Devices should have a minimum number of devices (the gateway is included in this number) within range.
- The distance between gateways of a dual-redundant gateway pair should not be more than 10 meters. The AMS Wireless SNAP-ON application does not check the distance between gateways of a redundant gateway pair. You should ensure that the distance does not exceed the maximum distance.
- If a network contains a fast update rate device (Update rate <= 2 seconds) or a critical output device, those devices must be less than twice their range from the gateway.