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Document: LT0273 MX4428 MXP Engineering / Technical Manual
MXP Diagnostic Terminal
Issue 1.5 24 March 2006 Page 8-3
SPA Adds all points to the list of points to be monitored.
SP nnn Adds point nnn to list.
P nnn Adds point nnn to list
SP nnn mmm Adds points nnn to mmm.
P nnn mmm Adds points nnn to mmm.
CPA Clears all points from monitoring list.
CP nnn Clears point nnn from list.
CP nnn mmm Clears points nnn to mmm from list.
SP Displays all points selected to be monitored (i.e. in monitoring list)
The values nnn and mmm must be in the range of 1-200.
Note that if more than about 50 points are monitored at once, the serial output may not be
fast enough and some data may be discarded.
If it is not required to monitor any points be sure to deselect all points (CPA).
Monitoring a large number of points may have a detrimental effect on processing
time. Therefore enter the CPA command before disconnecting the laptop after
monitoring points.
8.1.4 DISPLAYING DEVICE ANALOGUE VALUES - CV, TV, ETC
Once points have been selected for display, the MXP will display at least one line for each
selected point, each time the point replies to a poll (or sends an interrupt message).
For those devices with two sensors (814PH, 814CH) with both sensors configured, two lines
will be displayed – one line for temperature and another line for smoke or CO.
Colour logging may be selected with the “CO” command to make the displayed log clearer.
Green is used for heat sensors, yellow for photo sensors, magenta for CO sensors, cyan for
ionisation sensors, and white for ancillaries. A brown/yellow background is used for values in
fault, green background for values in pre-alarm, red background for values in alarm.
An example line of the displayed values is
T=165; P= 2; HEAT= 20; Fl= 20; SL= 20; RoR= 0; SLRoR= 0
T=xxxx refers to the time in seconds. It recycles back to 0 after 4290 seconds.
P=xxx refers to the point number (1 .. 200).
The format is designed to be both human readable and suitable for capturing and importing
into a spreadsheet. In the latter case, it is suggested that “delimited” text import is used, with
“=” and “;” being used as delimiters.
The following paragraphs describe the parts of the log specific to each device type.
8.1.4.1 Heat Sensor of 814H, 814PH, and 814CH
T=165; P= 2; HEAT= 20; Fl= 20; SL= 20; RoR= 0; SLRoR= 0
HEAT=xxx gives the raw value received from the detector converted to °C.
Fl=xxx gives the filtered temperature (CV) in °C. This is the value which is compared with the
threshold to decide if a pre-alarm exists.
SL=xxx gives the filtered and slope limited temperature (SLV) in °C. This is the value which
is compared with the threshold to decide if an alarm exists. This item will not be displayed if
there is no fixed temperature alarm configured, e.g. if the heat sensor is used only to
enhance the smoke or CO.