Measurement-computing CIO-DAS16/M1 Manual de usuario descargar pdf (Pagina 22)

A register stores the most recently written C/G memory address and this C/G element becomes the

RESTART ADDRESS. Each time the restart address is reached, the C/G address pointer is reset to point

to address 0, which contains the first element in the C/G list.

When the A/D starts the acquisition scan, the first sample is controlled from the first entry in the C/G

memory, address 0. The second sample is controlled by the second entry made in C/G memory and so on

until the RESTART ADDRESS (last entry) address of C/G memory is reached. At this point the C/G

memory pointer is reset to the address 0 and the sequence of C/G begins again. The process will repeat as

long as the A/D is acquiring data.

For the programmer who wants to write to the C/G memory directly, you must arrange the C/G scan as

follows:

Order to Execute Channel/Gain C/G Memory Address Pointer

First 3 0

Second 1 1

Third 2 2

Fourth 3 3

Fifth 4 4

Sixth (restart address) 5 5

NOTE: C/G data must be loaded into C/G memory in the order 0, 1, 2, 3, 4, 5 as in the example above.

TO LOAD THE C/G MEMORY:

1.) Write to Base + 6 to point to the C/G memory address,

2.) Write to Base + 7 to load the C/G data into the C/G memory address pointed to by Base + 6.

3.) Do this for each element in the C/G list.

4.) The last address written to the pointer, Base + 6, is the restart address.

NOTE: If you have loaded a long series of C/G entries into the C/G memory and you want to shorten the

list to use only the first N entries, simply re-write the Nth entry again. This updates the RESTART

ADDRESS in the restart address register.

NOTE: Any write to this register clears the FIFO buffer.

4.6.7 Channel Gain Queue Data Register

BASE ADDRESS + 7

76543210

RANGE U/B G1 G2 CH3 CH2 CH1 CH0

Range Uni/Bip G1 G0 Input Range Decimal Gain Code*

1 0 0 0 ±10V 128

0 0 0 0 ±5V 0

0 0 0 1 ±2.5V 16

0 0 1 0 ±1.25V 32

0 0 1 1 ±0.625V 48

0 1 0 0 0 to10V 64

0 1 0 1 0 to 5V 80

0 1 1 0 0 to 2.5V 96

0 1 1 1 0 to 1.25V 112

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 37 38

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Measurement-computing CIO-DAS16/M1 Manual de usuario Pagina 22