Elster A100C - Appendix C: Software; IrDA Data Software Usage

38 A100C - BS Single Phase Electronic Meter
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A2 IrDA Serial Word Formats
high
Logic
levels
low
Start
bit
Serial word
Data bits
Stop
bit
Stop
bit
Stop
bit
high
Infra-red
intensity
low
high
Output
current
low
Start
bit
Start
bit
IR frame
Serial output word
Data bits
Data bits
Bit
time
Bit
time
Pulse
width
Pulse
width
0 1 0 1 0 0 1 1 0 1
0 1 0 1 0 0 1 1 0 1
0 1 0 1 0 0 1 1 0 1
Encoding of Infra-red and absolute serial data output pulses to represent serial word
A standard serial signal may be reconstructed by triggering a monostable (τ = 1/baud rate,
seconds) on receipt of each infra-red or serial pulse.
© Elster Metering Limited - M130 300 2C - 5.2007