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Ambient Temperature Message
Header Byte:
0x84
Message Format:
0x84 <AmbE 32 bit IEEE> <AmbC 32 bit IEEE>
Description:
Pyrometer ambient temperatures.
AmbE = Electronics Temperature.
AmbC = Chassis Temperature.
Example:
Electronics temperature of 28.4C and photodiode temperature of 31.5C.
Message: 84 41 E3 33 33 41 FC 00 00
Host to Pyrometer Commands
Commands to the pyrometer always start with the Start of Command (STX). This is followed by a single byte
command character and any parameter values required by the command. Commands always end with a single byte
checksum (LRC) character followed by the End of Command (ETX) character. See the Command Reference
section for a description of each command.
Command Framing Characters:
STX
0x02
Start of Command
ETX
0x03
End of Command
ACK
0x06
Positive Acknowledge
DLE
0x10
Data Link Escape
NAK
0x15
Negative Acknowledge
Command Escape Sequence
The host must use the DLE (Data Link Escape) character, 0x10, to escape any command framing characters that
occur in messages sent to the pyrometer.
Note that the DLE character is NOT included in the LRC calculation.
Example 1:
The following command sets the User Rate Index to 0x3. The value of the ETX character (0x03) occurs
in the data field of the message and must be escaped.
Command:
02 4E 10 03 4D 03
Example 2:
The NAK (Negative Ack) character 0x15 occurs as a binary value in the command message and must
be escaped by the host.
Command:
02 4F 00 10 15 5A 03
LRC Calculation
The LRC is calculated by taking the XOR of every non-framing character in the command. An example is shown
for the LRC of a command to write a table entry.
Command:
02 44 45 00 42C80000 3F666666 3F000000 LRC 03
LRC Portion:
44 45 00 42C80000 3F666666 3F000000
LRC =
XOR of all bytes in the LRC Portion = ED
Command with LRC:
02 44 45 00 42C80000 3F666666 3F000000 ED 03
Содержание EXACTUS
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Страница 23: ... 19 Figure 12 All Probes display Figure 13 Analog Output Setup Window ...
Страница 37: ... 33 Figure 14 Lens Collection Optics Pyrometer ...
Страница 38: ... 34 Figure 15 Probe with Lightpipe ...