Electro Industries Shark 200 Installation & Operation Manual page 231

000001a0 FF FF FF FF FF FF FF FF
000001b0 18 88 17 78 16 60 15 80
000001c0 11 18 10 68 0F 90 0E 90
000001d0 0C A8 0C 48 0C 70 0C 68
...
waveform_capture[424] // 41 = 'A'
waveform_capture[425] // 4E = 'N'
Processing a Waveform Capture
Once the waveform capture has been created, you can use the waveform capture
byte-map (see tables earlier in this section) to extract the RMS and channel sample
data values desired. Take note that the waveform capture byte-map is in MSB (hi-
byte, lo-byte) form.
The following is an example snippet in which we first parse the waveform capture
header values and then each waveform capture channel block using a predefined
function. (NOTE: We assume the channel blocks to be in order in this example, e.g.
AN, IA, BN, IB, CN, IC. These channels can be in any order and it is up to you to check
which channel ID values you are currently processing).
// HEADER BLOCK PARSING - Get Waveform Capture header values (hi-byte,
lo-byte)
trigger_source = BitConverter.ToUInt16(new byte[2] { waveform_cap-
ture[0], waveform_capture[1] }, 0);
sample_rate
flags = waveform_capture[3];
...
rms_va = BitConverter.ToUInt16(new byte[2] { waveform_capture[12],
waveform_capture[13] }, 0);
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= waveform_capture[2];
B: Modbus Map and Retrieving Logs
41 4E 00 00 1A 70 19 50
14 98 13 70 12 E0 12 10
0E 00 0D 68 0C D8 0C D0
0C 30 0C 60 0C 98 0D 00
#
Doc E149701
//414E = "AN"
B-47