West Control Solutions N8080 (for 2xxx) - Manual (Page 14)

3.3.3 Form 3 Message
This message implements the Parameter Write operation either on a single
addressed instrument (address in the range 1 - 99) or broadcast to all instruments
connected to the master device (i.e. using address 00). Note that, with the
broadcast message, each slave instrument does not generate a reply. The
message from the master device is of the form:
Laapnnnnn*
where aa is the address (a two-digit hexadecimal number)
p is a single-character parameter identifier (see Table 3-1)
nnnnn is the value to be written (a five-digit hexadecimal
number)
The reply for a successful Parameter Write operation is of the form:
LaapnnnnnA*
where aa is the same address as in the received message
p is a single-character parameter identifier (see Table 3-1)
nnnnn is the value written (a five-digit hexadecimal number). In
cases in which this parameter does not exist or is not
applicable for the slave instrument, this value is 00000.
Iif a valid parameter is specified with an invalid value or an error condition is
encountered, the reply is of the form:
LaapnnnnnN*
where aa is the same address as in the received message
p is a single-character parameter identifier (see Table 3-1)
nnnnn indicates the error condition:
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Value Error Condition
FFFFF Value under-range
7FFFF Value over-range
7FFFE Sensor Break detected
00001 Read Only parameter
00000 Illegal value