Huawei NetCol5000-A021HN12D 20020E1 Quick Manual page 20

When the host monitors smart cooling products using the RS485 protocol, the time needed for
collecting all data from a single smart cooling product is 3 seconds. In the teamwork mode of
cascading using an RS485 bus for monitoring, it takes the host 3 seconds multiplied by N to collect
data from N smart cooling products in the group. If the host needs more time to collect data from all
smart cooling products than what the host performance requires, the smart cooling products can be
grouped for data collection. Assume that the host needs to collect the data from all smart cooling
products within 12 seconds you are advised to incorporate four smart cooling products in one group
and connect the COM port of the first smart cooling product for each group to an RS485 port on the
host. The following figure shows how 32 teamworked smart cooling products, four in each group, to
connect to the hosts.
NOTE
Users can adjust the number of smart cooling products under one group based on the performance
requirements.
1. If 32 smart cooling products are teamworked, every four smart cooling products are included in
one group, which then connects to an independent RS485 port on the host.
2. Set toggle switch 1 for smart cooling products 1 and 32 to ON. Set toggle switches 2 and 3 for
the last smart cooling product of each group (namely, smart cooling product 4, smart cooling
product 8, ..., smart cooling product 28) both to OFF, except the smart cooling product in the
end, that is, smart cooling product 32. Retain the default settings of other toggle switches.
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