Yudian AI Series

17
dL PV input filter
The value of dL will determine the ability of filtering noise.
There is one intermediate-
value filter system and one second order integral
d
igital filter system in AI series instrument. Intermediate value filter takes
intermediate value among three continuous values, while integral filter has the
same effect as resistance-
capacity integral filter. If measurement input
fluctuates due to noise,
then digital filter can be used to smooth the input.
Parameter “dL” may be configured in the range of 0 to 20, among which, 0
means no filter, 1 means intermediate-value filter and 2～
20 means that
intermediate-value filter and integral filter can be selected simultaneously.
If great interference exists, then you can increase parameter “dF” gradually to
make momentary fluctuation of measured value less than 2 to 5.
When the instrument is being metrological verified, “dF” s can be set to 0 or 1
to shorten the response time.
0～20
run
System running
mode
For AI-518P running mode is :
Run=A×1+D×8
Among which: A is used to select 5 kinds of power-
cut event handling
modes; D is used to select 4 kinds of run /modify event-handling modes;
A=0, start to run the
program from step 1 unless the instrument was in “stop”
state before power cut.
A=1,
if these is deviation alarm after power resume, then stop the program,
otherwise, continue to run the program from the original break point.
A=2, continue to run the program from the original break point..
A=3, stop the program.
A=4,
go into HOLD state after power on. If it is in StoP state before power cut,
then keep in StoP State after power on.
D=0, neither PV startup nor PV preparation function. Program is executed as
planed. This mode guarantees constant running time of the program, but it
can’t guarantee the integrity of the whole curve.
D=1, With the function of PV startup and without the function of preparation.
D=2 With the function of preparation and without the function of measurement
value startup.
D=3 With the function of measurement value startup and preparation.
For details about PV startup function and PV preparation function, see program
instruction later chapter.
For example: for one AI-518P, can set A=2,D=3, then we get parameter:
Run=2×1+3×8+0×32=26