Operation in meter mode
ZDUE-LTE-PLUS-VII
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6
Operation in meter mode
To switch on the meter mode, disconnect the ZDUE-LTE-PLUS-VII from the
power supply. Then set the DIP switch (see chapter 2.1) to "OFF" so that the
ZDUE-LTE-PLUS-VII operates in meter mode.
In meter mode, the ZDUE-LTE-PLUS-VII automatically accepts IP or IP
telemetry connections via the LTE/GPRS interface from the head end
system and connects the connected meters directly to the head end system.
In transparent mode (mode A according to EN 62056-21), the data speed on
the meter interface is set to a fixed value by setting parameters. The
respective communicating meter and the head end system connected via the
modem exchange the data directly at the selected speed, i.e. the ZDUE-
LTE-PLUS-VII data between head end system and meter. If Mode C
according to EN 62056-21 is activated, the ZDUE-LTE-PLUS-VII adjusts the
bit rate but does not change the data contents.
The ZDUE-LTE-PLUS-VII can be configured remotely via the LTE/GPRS
connection using configuration commands in accordance with EN 62056-21.
6.1 Communication according to EN 62056-21
Control features
In meter mode, the ZDUE-LTE-PLUS-VII controls the communication
between the head end system and the meters connected to the ZDUE-LTE-
PLUS-VII in accordance with protocol EN 62056-21 (Appendix A):
in mode A/C,
in data readout and programming mode
including data backup (reception) and acknowledgement.
The start baud rate and the data format can be set for the interfaces CL1
(Current-Loop Interface), RS-232 and RS-485.
Please note that these meter interface settings apply equally to all interfaces.
In Mode C operation, the baud rate is switched according to the baud
rate ID contained in the acknowledge telegram from the head end
system.
Detection of the end
of a communication
cycle
During data readout, the end of a communication cycle is detected when
>= 3 seconds no meter data is received (Mode A/C Timeout)
→
the sequence 'CR LF ETX' is detected (Mode C regular end)
→
In programming mode, the end of a communication cycle is detected when
a 'Break' telegram is detected (Mode A/C abort)
→
.
After completion of a communication cycle, the connection is disconnected
and the baud rate of the serial interface driver of the meter interfaces is reset
to the parameterised start value.
Содержание Dr. Neuhaus ZDUE-LTE-PLUS-VII
Страница 1: ...ZDUE LTE PLUS VII User manual...
