The remainder of this section describes operation with Fusesaver. The equivalent description for
CMR is available in [3] .
12 After the configuration is loaded, the RCU restarts and searches for the Fusesavers
specified in the configuration. While searching, the RCU will flash the Switchgear OK
LED. When it finds and establishes communications with all the Fusesavers in the line
the Switchgear OK LED will stop flashing and be on steady. This normally takes
approximately 5 minutes.
13 If the RCU cannot find all the Fusesavers in the line the Switchgear Problem LED will be
on steady. This may take up to 10 minutes to occur. If the RCU cannot successfully find
Fusesavers its behaviour depends upon the configuration.
a. If, when configuring the RCU the user has entered a Fusesaver Line Name (this
is the unique way that Fusesaver lines are identified) then the RCU will search
indefinitely for the Fusesavers that make up the named Fusesaver line.
b. However if no Fusesaver Line Name has been entered then the RCU will search
for Fusesavers within range of its short range radio.
14 If the RCU finds at least one Fusesaver in a line it will continue searching for the other
Fusesavers on that line until the search times out after several minutes. However, if it
can’t find any working Fusesavers it will restart itself and search for any Fusesaver over
again. The RCU will do this up to three times at 10 minute intervals then 5 times at 1
hour intervals and then stop. This prevents continual restarts generating nuisance alarms
for the SCADA system. To get the RCU to search again the RCU must be restarted either
by remote control or by a local operator.
It is strongly advised that only one RCU and one set of Fusesavers be
within range at the same time. For workshop testing this means
ensuring additional RCU’s are turned OFF and additional Fusesavers
do not have Communications Modules fitted.
If multiple Fusesaver Lines co-exist at a single site please contact a
Siemens Service Centre for advice on how to manage these sites.
7.5 Site Checking
The user can check a Remote Control Unit configuration by clicking on the "Maintain/Check RCU"
Button from the main menu of RCU Connect. This allows the user to view Remote Control Unit data,
and data about the connection the Remote Control Unit has to the Fusesaver line.
From the "Maintain/Check RCU" screen (see figure 47 below), the user can also save the
configuration, restart the Remote Control Unit and set the clock on the Remote Control Unit (this can
be useful if a connection to the SCADA network has not been made, for example, when testing in
the workshop).
In the "RCU Status" section, the user can find information regarding the battery life remaining,
communication statistics, and some diagnostic information on the power supply and configuration.
If there is a problem with the connection between the Remote Control Unit and the Fusesaver line,
the "Fusesaver Config Error" box is checked (see figure 47). If this occurs, there is a problem with
the RCU configuration, the Fusesaver line configuration, or the radio connection between the two.
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