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© STULZ GmbH – all rights reserved EN/11.2018/G67C
wib8000 original instructions
The bus will be configured automatically, when you initiate the WIB module to scan the bus and to record all
units found in the bus configuration.
Section: Scan
For this purpose select for one or the two busses the menu item "Start" of the "scan" function and click on the
"Send"-Button. The number of units found is updated each time when a unit has been found.
You can abort the scan at any time, when e.g. the actual number of existing units in the bus appears in the
choice box "number of units", by selecting the menu item "Stop" and clicking again on the "Send"-Button.
You can limit the global address range which is scanned to save time. Scanning 1200 addresses takes
approximately one hour.
Section: bus 1 / bus 2
To indicate the bus you can give it a name, which refers for example to the location where the units are placed.
In "Timeout" you can set the time how long the WIB waits for a response of connected units. Exceeding this
time is evaluated as a communication error. The maximum cache holding time indicates how long data points
are available in the cache memory as valid data points.
A short cache holding time guarantees actual data but causes high data traffic on the bus. A longer cache
holding time reduces the traffic but bears the risk that the data might not be up to date.
With the pre-fetch period you can set a time interval, in which the WIB reads and buffers all data points that
are configured for each single unit for the unit overview (menu: config/web interface). Data points which are
cached in this way, are read from the WIB cache, instead of being directly read from the unit during http/
SNMP queries to the WIB. The setting "0" switches the pre-fetching off.
With a properly tuned pre-fetch period the (up to 20) data points per unit will be provided faster at the http and
SNMP interface.
For this purpose the pre-fetch period must be set so that all data points can be read before the maximum
Bus configuration
(Menu: Web Interface/Bus/Setup)
