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Function
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D000011142 en k – E65C CU-B1, B2, B4 – User Manual
An emergency window can be activated with weekly or monthly communi-
cation windows. The modem opens this emergency window 24 hours after
the regular communication window if no remote reading has taken place
within the regular time-window.
ZxD...AT/CT
Control centre
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24 h
Possibilities of access with or without time-window:
Fig. 11 Summary of access possibilities with or without time-window, with time and
emergency window
Communication between ZxDxxxAT/CT meters and control centre can take
place in the ways illustrated above:
from control centre to meter at any time
from control centre to meter daily, weekly or monthly during a defined
time-window
from control centre to meter daily, weekly or monthly during a defined
time-window with additional emergency window
The emergency window is open to the control centre 24 hours after the
regular time-window, if the meter has not called there during the regular
time-window.
Outside of the time-window the modem accepts no call or only after a large
number of ring signals.
4.3.2
Function of LEDs
Functions of the individual LEDs during normal operation:
This LED has no function in the CU-B2 version (without RS232). In versions
CU-B1 and CU-B4 (with RS232) this LED is continuously lit if there is a
connection between the communication unit and the control centre. Data
exchange can take place.
This LED indicates the reception of characters via the RS232 or RS485
interface. The characters are extended by 100 ms. If this LED is flashing, it
indicates reception of the "Ring" function.
This LED indicates the transmission of characters via the RS232 or RS485
interface. The characters are extended by 100 ms.
Emergency window
CON:
Rx:
Tx:
