Step 5 - Repeat Step 3 and 4 until each channel has been completed.
Step 6 - The various A/D channels have signal conditioning, so mathematical manipulation of the voltage read will have to be performed. See Chapter 4 for the equations.
Example 5.1 - Read A/D channels 1 and 0
gain0 = 23.064 gain1 = 1!
channel = 1
Command$ = “!0RA” + CHR$(channel) Print #1, Command$;
‘Get the value of channel 1 MSB$ = INPUT$ (1, #1)
LSB$ = INPUT (1, #1)
ad1 = (ASC(MSB$) * 256) + ACS(LSB$) reading1 = 5! * ad1 / (gain1 * 4095!)
‘Get the value of channel 0
MSB$ = INPUT$ (1, #1)
LSB$ = INPUT$ (1, #1)
ad0 = (ASC(MSB$) * 256) + ACS(LSB$)
reading0 = (((ad0 * 1000!) / 4095!) * 5!) / (10!
*
gain0)
The value of reading1 is the result of the A/D conversion on channel
1.The value of reading0 is the result of the A/D conversion on channel 0.
Read Digital I/O Command
The Read Digital I/O command returns a byte which represents the states of the digital input and digital output. Bit 0 corresponds to the state of digital output. Bit 3 corresponds to the state of digital input. If a bit is a 0 then the digital state of that digital I/O is LOW. If a bit is a 1 then the digital state of the I/O is HIGH.
24Documentation Number 232OPSDA1397 Manual
B&B Electronics
PH (815)
