Delta RMC151 - Manual (Page 186)

RMC70/150 and RMCTools User Manual
To read a plot using this method, follow these steps:
1. Wait for the Plot to Complete
Before reading the plot data using this method, the plot must have completed capturing
data. Reading the plot before it has completed may result in unusable information.
Use the Plot State register to tell whether the plot has completed capturing. The plot
has completed when the Plot State register is 2:
0 = not triggered, 1 = capturing, 2 = complete.
2. Read the Plot Data
Read the data from the Static Plot Upload Area, as listed below. For other address
formats, see the RMC70 Register Map - Static Plot Upload or the RMC150 Register Map -
Static Plot Upload topics.
Static Plot Upload Area Register
RMC150 Address RMC70 Address
Plot 0, Data Set 0 (samples 0-4095) %MD112.0-4095 %MD48.0-4095
Plot 0, Data Set 1 (samples 0-4095) %MD113.0-4095 %MD49.0-4095
Plot 0, Data Set 2 (samples 0-4095) %MD114.0-4095 %MD50.0-4095
Plot 0, Data Set 3 (samples 0-4095) %MD115.0-4095 %MD51.0-4095
Plot 1, Data Set n (samples 0-4095),
n=0-3
%MD116+n.0-
4095
%MD52+n.0-4095
Plot 2, Data Set n (samples 0-4095),
n=0-3
%MD120+n.0-
4095
n/a
Plot 3, Data Set n (samples 0-4095),
n=0-3
%MD124+n.0-
4095
n/a
Plot 4, Data Set n (samples 0-4095),
n=0-3
%MD128+n.0-
4095
n/a
Plot 5, Data Set n (samples 0-4095),
n=0-3
%MD132+n.0-
4095
n/a
Plot 6, Data Set n (samples 0-4095),
n=0-3
%MD136+n.0-
4095
n/a
Plot 7, Data Set n (samples 0-4095),
n=0-3
%MD140+n.0-
4095
n/a
Note:
Many host controllers do not support reading files with 4096 elements. However, smaller
blocks of data can be read just as well.
Tip:
In order to use the plot data, you will probably need to know the sample period. The Sample
Period register contains that information.
Verifying that the Plot wasn't Overwritten
It is possible that while you are reading up a plot, the plot re-triggers and is
overwritten. In that case, your data may be unusable. To check whether the plot
was overwritten, compare the Plot ID register, before and after reading the plot
data.
Reading a Plot While it's Still Capturing
It is possible to begin reading up a plot before it has finished capturing. However,
reading beyond the end of the data set's currently-captured limit will result in
unusable information.
166 Delta Computer Systems, Inc.