Laurel Electronics LAUREATE SERIES Serial Comunications - Manual (Page 20)

transmits up to 3 values) each measurement cycle, Modes 8-11 provide the ability
of the Remote Display to extract one of four sequential values and display it.
Modes 0-5 are normal counter modes that may be commanded as follows:
1.
H Command. Override the normal display reading only.
2. K Command. The value is not displayed but stored as Item 3 if Item 3 is not
being used, where it may become the source, if selected, for the Alarm
comparison and the Analog Output. Item 3 is used only for the Batch and
Arithmetic functions.
3. L Command. Both 1 and 2.
In addition, the H, K, L commands may or may not include a coded Alarm character.
If included, it always overrides the internal Alarm comparisons and determines the
alarm indicators, the relay operation and the alarm character sent with the serial
communications. Readings continue to be made internally during Remote Display
operation and may be received by a Host Computer, manipulated, and returned as
remote data. When reset by a
* 1C4 Command, the display returns to its internal
readings, the Alarms to its internal comparisons, the Analog Output to zero and the
Item 3 value to zero. A signal conditioner board must be present in these modes to
return to normal readings. If no signal conditioner board is present, any Mode setting
from 0-5 automatically changes to Mode 6.
Modes 6-11 are used for remote display only. No normal readings are made. A
signal conditioner board is optional, and if present, is ignored. When reset, the
display shows “rESEt” until the first remote display data is received.
Mode 6 is an addressable remote display mode that uses the H, K, L commands.
Mode 7 is not addressable and data representing a value to be displayed is
received in a Pt-Pt connection. Besides displaying the value, it is put into Item 3
where it may be selected for Alarm comparisons and for Analog Output. If a Coded
Alarm character is included it overrides the internal alarm comparisons.
Modes 8-11 are able to extract one value of data from a sequence of values and
display that particular value only. It could be one of several slave counters connected
to a Host Counter, each displaying a different Item value. Also, the extracted value
is put into Item 3 where it may be selected for Alarm comparisons and Analog Output.
If a Coded Alarm character is included at the end of the sequence, it is ignored.
The remote display reading can only be changed by Meter Reset, a * 1C4 Remote
display reset command or another remote display H or L command.
DATA FORMATS
The basic two Command formats of the data sent via Serial Communications are:
* #CSDDDDDD.A where the decimal point is to the right of any one of
the D’s (digits).
* #CSD.DDDEPA this is the exponential format. The decimal point is
fixed. Alarm comparison and Analog Output are not valid in this format.
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