GE 90-30/20/Micro manual Data Block, Channel Number Channel Contents

4

last channel description is required to pad the sample buffer out to the 24 bits specified in the number of channels parameter.

Since all 24 channels are configured there are no more channel descriptions needed and we have reached the end of our block.

The following table summarizes the values contained in a single sample based upon the above channel descriptions and control block:

Channel Number		Channel Contents
	1	%I0001
2	- 4	Zeros
	5	Input Module Point 13
	6	Input Module Point 14
	7	Input Module Point 15
	8	%Q0009
	9	%Q0010
10	- 17	Input Module Points 1 - 8
18	- 24	Zeros

Data Block

This is the format of the resulting data block from the control block described above. Note that it begins at register 201 as described by the segment offset parameters in the control block.

Offset	Register	Parameter Description	Value (dec)	Value (hex)
0	%R0201	Current sample offset #:	59	003B
1	202	Trigger sample offset #:	0	0000
2 - 5	203 – 206	Trigger time (BCD)	0	0000
			0	0000
			0	0000
			0	0000
6 - 768	207 – 975	Samples Buffer:	sample data.	sample data.

Current sample offset is 59 meaning that we are 59 samples into the sample buffer (not 59 registers). With 3 bytes per sample we are actually at; 59 * 3 = 177 bytes or the hi byte of the 88th register. Since we have not met the trigger conditions yet the trigger sample and trigger time are 0 and the boolean output is not set. The sample buffer contains 512 samples where 59 is the newest sample and 60 is the oldest sample.

4-122 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K