Siemens AC75 - Manual (Page 487)

AC75 AT Command Set
19.4 AT^SBC
s
AC75_ATC_V01.002 Page 487 of 569 10/30/06
Confidential / Released
URC 2
^SBC: Overvoltage warning
This URC is an alarm indicator displayed when the supply voltage approaches its maximum level. The URC
appears only once.
URC 3
^SBC: Overvoltage shutdown
This URC will be reported when the voltage exceeds the maximum level specified in the Hardware Interface
Description [2] . It appears only once before the module starts to perform an orderly shutdown.
In applications powered from Lithium batteries the incorporated protection circuit typically prevents over-
charging, thus eliminating the risk of overvoltage conditions. Yet, in case of charging errors, for example
caused by a bad battery or due to the absence of a battery protection circuit, the module's overvoltage shut-
down function will take effect to avoid overcharging.
Parameter Description
Connection status of battery pack
0
No charging adapter is connected
1 Charging adapter is connected
2 Charging adapter is connected, charging in progress
3 Charging adapter is connected, charging has finished
4 Charging error, charging is interrupted
5 False charging temperature, charging is interrupted while temperature is
beyond allowed range
Battery capacity
0, 20, 40, 60, 80, 100 percent of remaining capacity (6 steps).
"0" indicates that either the battery is exhausted or the capacity value is not available. "100" indicates a remain-
ing capacity between 81 and 100 percent, "80" indicates 61 ... 81 percent, and so on.
While charging is in progress (charging adapter connected) the battery capacity is not available. Consequently,
parameter
<bcl>
=0. To query the battery capacity disconnect the charger.
Current consumption of the host application as specified with parameter
<current>
.
0 (P) ...5000 Enter the current consumption of your host application in mA. This information
enables AC75 to correctly determine the end of charging and terminate charg-
ing automatically when the battery is fully charged. Note that if
<current>
is
inaccurate, and the application draws a current higher than the final charge
current, either charging will not be terminated or the battery fails to reach its
maximum voltage. Therefore, the termination condition is defined as: current
consumption dependent on operating mode of the ME plus current consump-
tion of the external application. If used, the current flowing over the VEXT pin
of the application interface must be added, too.
The specified value will also be displayed as parameter
<mpc>
of the
AT^SBC
read command.
When the AC75 is powered down or reset, the value of
<current>
is restored
to its default. This affects the charging control. Therefore, the parameter should
be set every time when needed after rebooting the AC75.
<bcs>
(num)
<bcl>
(num)
<mpc>
(num)
<current>
(num)