Iec 62056-21 Mode C; Readout Configuration - Landis+Gyr E350 Series User Manual

Operation
5.5.1

IEC 62056-21 Mode C

5.5.2

Readout Configuration

Readout and
display items
Readout error
code (F.F)

D000027979 en t – E350 Series 2, 3-Phase ZxF100Ax/Cx – User Manual

Reading the meter's LCD. Only the data shown in the display list can
be recorded.

Automatic data readout via the optical interface with the aid of, e.g., a
PDA or laptop. Further data are then accessible depending on the
parameterisation (total registers etc.). Log corresponds to the
provisions of IEC62056-21, a communication standard for meters.
The meter supports IEC 62056-21 mode C-a. This enables the reading of
data from the meter in the data readout mode. After an initial sign-on
sequence, the meter transmits its data to the PDA. This consists of a
number of items which are set in the configuration. Each item is sent in
ASCII with OBIS (IEC 62056-61) identifiers. Each identifier is on a separate
line (separated by carriage return and line feed characters CRLF) and
follows the format Identifier (value*units).
The maximum transmission rate is 9600 bps. The response message
identifies the firmware version and the IEC 62056-21 transmission rate mode
used.
The meter provides also a manufacturer specific mode C-C, which delivers
only a part of the read out list (start and end item are configurable during
production). This can be used for fast read out for frequently required values.
The readout items, their order in the list, along with the number of decimal
places for the registers, are specified in the configuration. The register
sizes can have up to 6 integer digits and up to 3 decimal places. This is
independent on the display configuration.
The readout list (similar to the display list) consists of a number of specified
items. The customer specifies the readout sequence. This sequence is set
at the factory. All items are identified with OBIS codes when read out.
The items that can be placed in the readout list (in any order except for
"Error code" which is always first in the list) are listed in section 5.2.9
"Meter Display List – Available Items with OBIS Codes" on page 40. Most
of these items can be included in the readout list.
The error code consists of 8 bits and describes the following:
Bit number Allocation
0 Not used
1 MMI initialisation or communications failure
2 Error accessing EEPROM
3 Calibration data is corrupted
4 Not used
5 Error restoring energy registers
6 Data saved to EEPROM on power fail is corrupted
7 Not used
Valid for readout with E35C modules! For other modules, other codes may
be delivered, e.g. equal to error display values .
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