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3.9 Control inputs
The DLX unit can have up to 7 control inputs (Ctl1..Ctl7). These inputs are
by default of the S0 type (also called IES), but optionally they are available
in wipe technology (IEW). Control inputs are programmed and activated by
the software application DLXPARA. The following functions are available:
•
SYN-
input:
Synchronization of the internal real time clock via external
transmitters or external DCF77 receiver (see page 86)
•
RSTX-
input:
External maximum demand reset
•
ANZ-
input:
External control for scrolling of the display
•
TR1 to TR4:
Rate control via external transmitters (e.g. ripple control
receivers)
•
Log1 to Log4:
Logic inputs that allow connection of the DLX with signal
outputs of external devices. With these inputs the user
can create and log events that are relevant to the proc-
essing of meter readings (e.g. defective transformers or
external fault messages). The logic inputs are scanned
every 10 seconds (second 5, 15, 25, 35, 45, 55). Incom-
ing signals are stored in the spontaneous events buffer
together with date and time. They can additionally be
stored (this needs to be enabled by DLXPARA) in the de-
vice status data of the registration period area (L-bit, see
appendix A).
Control inputs are subject to a signal detection in software similar to the
one used for pulse inputs, i.e. pulses that fall short of a minimum length are
not considered. For control inputs the minimum pulse length and the mini-
mum pulse interval is set to 30ms.
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