Cooper Instruments & Systems DFI 200 Hand Held Indicator - Manual (Page 18)

CF 112 18 Version 3.1-0
A typical format for the host command is:- <STX>CA<CR> (Standard read)
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)
The
commands available and instrument responses are as follows:
1. Transmit Primary Display Value: <STX>PA<CR> e.g. ^BP!^M in the terminal program (address 1). Instructs
unit to return the primary display value. The primary value is the main display reading e.g. load or pressure. Format
of returned data is:- <ACK>PAXYYYY<CR>
Where:
<ACK> is Acknowledge (6 Dec, 06 Hex)
P is the echo command received “P” (80 Dec, 50 Hex)
A is the responding units address
X is “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 in the terminal program (address 1). Instructs
the unit to send the secondary display value. The value will equal the primary display value if the
function is
set to . If the function is set to , or the value for the selected
operation will be returned. Format of returned data is: <ACK>SAYYYY<CR> or <ACK>SAYYYY,YYYY<CR> in the
case of
.
Where:
<ACK> is Acknowledge (6 Dec, 06 Hex)
S echo command received “S” (83 Dec, 53 Hex)
A is the responding units address
YYYY is the secondary display value in ASCII
<CR> is a Carriage Return (13 Dec, 0D Hex)
For the primary and secondary display values will be identical. If is used then the primary display
value transmitted will be the live input value i.e. the gross value. The secondary display value transmitted will be the
tared value i.e the nett value. For
and the secondary display will be the held value and the
primary display the live input value. For the secondary display returned data will be the channel number i.e.
1, 2 or 3.
3. Transmit Instrument Model and Version: <STX>IA<CR> e.g. ^BI!^M in the terminal program (address 1) Instructs
unit to return the model and version number of the instrument. Format of returned data is:- <ACK>IACCX.X<CR>
Where:
<ACK> is Acknowledge (6 Dec, 06 Hex)
I is echo command received “I” (73 Dec, 49 Hex)
A is the responding units address
CC is a 2 character model identifier e.g “Ht”
X.X is the version number (e.g.: “0.1”)
<CR> is a Carriage Return (13 Dec, 0D Hex)