3.Correspondence between input signals and addresses in a module
In the analog input module AAD04B, the 4-channel analog input signals are cyclically A-D
converted in order, and the converted digital data are written in the following addresses.
Therefore, in the PMC program, it is possible at any time to know the values for the analog
input signals by referring to the following addresses.
0 D07-0 D06-0 D05-0 D04-0 D03-0 D02-0 D01-0 D00-0
1 D15-0 D14-0 D13-0 D12-0 D11-0 D10-0 D09-0 D08-0
2 D07-1 D06-1 D05-1 D04-1 D03-1 D02-1 D01-1 D00-1
3 D15-1 D14-1 D13-1 D12-1 D11-1 D10-1 D09-1 D08-1
4 D07-2 D06-2 D05-2 D04-2 D03-2 D02-2 D01-2 D00-2
5 D15-2 D14-2 D13-2 D12-2 D11-2 D10-2 D09-2 D08-2
6 D07-3 D06-3 D05-3 D04-3 D03-3 D02-3 D01-3 D00-3
7 D15-3 D14-3 D13-3 D12-3 D11-3 D10-3 D09-3 D08-3
D00-n and D15-n correspond to the weights of 2
Here, D15-n corresponds to the sign bit in the complementary representation of "2."
DESCRIPTION DESIG. DATE
FANUC I/O Unit-MODEL
High resolution analog input module
When addressing I/O modules, the beginning address for this module should be assigned to an even
one. Moreover, when an A-D converted value is referred to in a PMC program, make sure to read the
data in unit of a word (16 bits).
Because the resolution of this module is very high, when an A-D converted value is referred to in a
PMC program, the value might be unstable. It is possible to suppress the unstable value by masking
the subordinate bit or calculating the moving average value by the PMC program.