Honeywell SPM, Техническое руководство

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SPM Single Point Monitor
SPM Technical Handbook A-5
Normal Analysis Messages
In MONITOR Mode, the SPM will send gas concentration
and alarm data. This data will be sent at the completion
of the current analysis cycle. Each packet of gas
concentration information will contain an alarm flag. When
this flag is zero, there is no alarm for this current packet of
data (that is, this point does not have a gas concentration
in excess of either alarm set points).
In addition, it will send the time weighted average (TWA)
information, calibration information and other data. The
SPM will also send out any faults and other warnings, as
appropriate.
Errors and Faults
All errors and faults the SPM detects are sent out the
remote device communication port. This includes all
levels: warnings, errors or faults.
Commands
Your SPM will send any one of a number of commands to
your equipment. These commands are detailed in Table
A-4. They are listed by both the command number and
by name. All errors and faults are included in the set of
possible commands.
The SPM will accept and process commands that your
equipment may send to the instrument. These commands
are detailed in Table A-4.
Your equipment may also send a “RESET” to the SPM,
which functions as if the “RESET” button were pressed.
Table A-3 shows the typical command and data sets.
Command Date * Time * Parameter(s)
1 Byte 2 Bytes 2 Bytes (No of bytes is command dependent)
Table A-3: Command and Data Set
* In IBM-PC style format.
Table A-4 is a list of valid commands that the SPM will
issue. All command codes in the following table are
hexadecimal. The length of each parameter is indicated.
This list is subject to change without notice.
Command
Code (Hex)
Command Description
Parameters
(No of Bytes)
28 NOP (No Operation)
Date (2)
Time (2)
30 Gas Concentration or Alarm
Date (2)
Time (2)
Honeywell Gas No (1)
Format Code (1)
Concentration (2)
Current Loop Drive (1)
Alarm Flag (1)
32
Time Weighted Average
(TWA) Gas Concentration
End Date (2)
End Time (2)
Start Date (2)
Start Time (2)
Honeywell Gas No (1)
Format Code (1)
TWA (2)
35
SPM Information (Provision
for special/SER are
needed)
Date (2)
Time (2)
Revision, Major (1)
Revision, Minor (1)
EPROMs Checksum (2)
Honeywell Gas No (1)
SPM Serial No (2)
Option Flags (1)
61 Fault
Date (2)
Time (2)
SPM Fault No (1)
Table A-4: Valid SPM Commands