Communications; Irda Meter Communications; Irda Meter Optional Serial Data Output - Elster A100C Operating & Maintenance Instructions

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COMMUNICATIONS

The A100C has the option of IrDA or optical IEC 62056 -21 (Formerly IEC 1107)
communications. Both methods of communication allow the meter registers and security
data to be read electronically by a laptop or hand held device, greatly reducing the
possibility of manual reading errors. The IEC 62056 version allows the programming of
'personality' data.
13.1

IrDA Meter Communications

The IrDA communications port provides one way communications,
transmitting a continuous data stream from the meter to an external
device. The data stream includes a start and end mechanism to
identify the start and end of the data stream (see Appendix A1 for
IrDA data format). An error-checking algorithm protects the integrity
of the data stream.
IrDA communications offer low cost, low power consumption and
high noise immunity.
A manufacturing option allows the port to be set to transmit at one
the following baud rates:
2400 baud (default rate)
4800 baud
9600 baud
The port will transmit over a distance of 250mm and takes approximately 1 second (2400
baud) to transmit a complete message.
13.1.1

IrDA Meter Optional Serial Data Output

The auxiliary terminals can be configured at manufacture to transmit the same absolute
data stream as the IrDA port. The format of the data steam (See Appendix A1) is non-
standard 'return to zero', which requires the use of a special external interface.
If this option is used, the baud rate for communications can be set to the following rates:
2400 baud (default rate)
4800 baud
The port will transmit over a distance of up to 3m.
Operating & Maintenance Instructions
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