10-27
10. Data Format Commands (P, G, R, W)
10.29 RS-485 METER “AddRES”
This “1A” command suffix uses 2 HEX-ASCII characters for the device address, but
that number is limited to the 1 to 199 decimal range (many more numbers than the 32-
device hardware limit).
EXAMPLE: The computer wants to renumber meter #15 HEX (#21 decimal) to #25
HEX(#37 decimal); it then puts the new address into EEPROM with:
“*15W1A25<CR>”
Which, if “BUS.FMt”, would be echoed by the meter with “15W1A<CR>”.
This new address would then be put into action by giving the meter a hard reset,
“RESET2”, from the front-panel, by external contact closure (see Section 10.12), or by
sending the reset with:
“*15Z04<CR>”.
That meter will no longer answer to the “15” hex address; it now responds commands
preceded by “*25”.
10.30 NUMBER OF READINGS BETWEEN EACH TRANSMISSION (“SER CNt”)
The “1D” command suffix data is the number of readings between transmissions; this
is used only for point-to-point continuous transmission. Four nibbles (2 bytes or 4 HEX-
ASCII characters) are used; overflow detection limits the number of readings between
transmissions to 59999 (decimal).
“1D” values reside only in EEPROM, so only “R/W” command letters apply.
EXAMPLE: If you were on SLOW (approximately 3 readings/second) and wanted a
transmission every hour, the number of readings between transmissions would be
approximately 3*60*60 = 10800, or hex 2A30: to tell the meter, send:
“*W1D2A30<CR>”, which places the 2A30 into the EEPROM memory of the meter
(add a Hard Reset, “*Z04<CR>” to move this into RAM). If you have set “BUS.FMt”,
the meter will echo “W1D<CR>”.
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