Meter Mode; Controlling According To En62056-1 - SAGEMCOM Dr. Neuhaus ZDUE-GPRS-PLUS-VI User Manual

5.2 Meter Mode

5.3 Controlling according to EN62056-1

Control
characteristics
Detecting the end of
a communication
cycle
ZDUE-GPRS-PLUS-VI
To enter the meter mode disconnect the device from mains and set the DIP
switch 2.3) to „OFF". Connect the device to mains again.
In the meter mode the ZDUE-GPRS-PLUS-VI accepts automatically
incoming calls from the central station and connects transparently the
connected meters with the central station. The start bitrate at the meter
interfaces is set by parameters to a fix value. The meter which
communicates and the central station exchange directly the data, i.e. the
ZDUE-GPRS-PLUS-VI just passes through the data between central station
and meter.
If EN 62056-21 mode C is activated, the ZDUE-GPRS-PLUS-VI adapts the
bitrate, but does not modify the data content.
The ZDUE-GPRS-PLUS-VI can be configured remotely via the GSM
connection using configuration commands in accordance to DIN EN 62056-
21.
The ZDUE-GPRS-PLUS-VI controls the communication between the control
centre and the meters that are connected to the ZDUE-GPRS-PLUS-VI in
accordance with protocol EN 62056-21 (Annex A):
in A/C mode,
in data readout and programming mode
including data saving (receiving) and acknowledgement.
The starting baud rate and the data format can be set for the following
interfaces: CL1 (Current Loop interface), RS-232, RS-485
Please note that these meter interface settings apply equally for all
interfaces.
In mode C-Operation the baud rate is changed over according to the
baud rate ID contained in the acknowledge telegram of the control
centre.
When reading data, 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  break).
When a communication cycle is completed, the connection is terminated and
the baud rate of the serial interface driver of the meter interfaces is reset to
the parameterised start value.
Operation
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