Where:
<STX> is Start of Text Character (2 Dec, 02 Hex, ^B ASCII)
C is the command character (see following commands)
A is the unit address (Range: 32 to 63 Dec, 20 to 3F Hex, “SPACE” to ? ASCII, the address
is offset by 32 Dec, 20 Hex)
<CR> is Carriage Return (13 Dec, 0D Hex, ^M ASCII)
N is the setpoint number in ASCII e.g.: 1 for alarm 1 etc.
X SPACE for positive and ‘-’ for negative
YYYY is the setpoint value in ASCII
The
POLL
commands available and instrument responses are as follows:
1. Transmit Primary Display Value:
<STX>PA<CR>
e.g. ^BP!^M using Telix or similar (address 1).
Instructs unit to return the primary display value. The primary value is the live input reading. Format
of returned data is:-
<ACK>PAXYYYY<CR>
Where:
<ACK> is Acknowledge (6 Dec, 06 Hex)
P echo command received ‘P’ (80 Dec, 50 Hex)
A is the responding unit’s address
X SPACE for positive and ‘-’ for negative
YYYY is the display value in ASCII
<CR> is a Carriage Return (13 Dec, 0D Hex)
The number of display characters returned depends on the number of display digits present. If the
decimal point is non zero then it will be sent in the appropriate place as ‘.’ (46 Dec, 2E Hex).
2. Transmit Secondary Display Value:
<STX>SA<CR>
e.g. ^BS!^M using Telix or similar (address 1).
Instructs the unit to send the secondary display value. The value will equal the primary display value
if the
R.INP
function is set to
NONE
. If the
R.INP
function is set to
Hi
,
Lo
,
HiLo
,
P.HLd
or
d.HLd
the value
for the selected operation will be returned (note: For
HiLo
the Hi value followed by the Lo value will be sent
separated by a comma). Format of returned data is:
<ACK>SAYYYY<CR> or
<ACK>SAYYYY,YYYY<CR> in the case of
HiLo
Where:
<ACK> is Acknowledge (6 Dec, 06 Hex)
S echo command received ‘S’ (83 Dec, 53 Hex)
A is the responding unit’s address
YYYY is the secondary display value in ASCII
<CR> is a Carriage Return (13 Dec, 0D Hex)
3. Reset Special Function Value:
<STX>RA<CR>
e.g. ^BR#^M using Telix or similar (address 3).
Instructs the unit to reset the special function value (if applicable). Will reset the stored value for
Peak Hold, Valley High and Valley Low or will operate the tare or zero function if selected. Format of returned
data is:-
<ACK>RA<CR>
Where:
<ACK> is Acknowledge (6 Dec, 06 Hex)
R echo command received ‘R’ (82 Dec, 52 Hex)
A is the responding unit’s address
<CR> is a Carriage Return (13 Dec, 0D Hex)
If special functions are not active then the invalid command message will be returned (refer Invalid
Command later).
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