4: A
NALOG
I/O C
ONTROL
4-8
Data Register Allocation Numbers for Analog I/O Modules
Analog I/O modules are numbered from 1 through 7, in the order of increasing distance from the CPU module. Data regis-
ters are allocated to each analog I/O module depending on the analog I/O module number. END refresh type analog I/O
modules and ladder refresh type analog I/O modules have different data register allocation.
END Refresh Type Analog I/O Modules
Each END refresh type analog I/O module is automatically allocated 20 data registers to store parameters for controlling
analog I/O operation, starting with D760 through D779 for analog I/O module No. 1, up to D880 through D899 for analog
I/O module No. 7. When a maximum of seven analog I/O modules are
not
used, data registers allocated to the unused ana-
log I/O module numbers can be used as ordinary data registers.
When a maximum of seven END refresh type analog I/O modules are mounted, data registers D760 through D899 are
allocated to analog modules 1 through 7 as shown below. The ANST macro is used to program data registers for the analog
I/O module configuration. The CPU module checks the analog I/O configuration only once when the CPU starts to run. If
you have changed the parameter while the CPU is running, stop and restart the CPU to enable the new parameter.
The END refresh type analog I/O module number starts with 1 next to the CPU module up to a maximum of 7.
The run-time program download and test program download cannot be used to change analog I/O parameters.
Note:
Data registers allocated to the unused analog I/O module numbers can be used as ordinar y data registers.
Channel
Function
END Refresh Type Analog I/O Module No.
R/W
1
2
3
4
5
6
7
Analog
Input
Ch 0
Analog input data
D760
D780
D800
D820
D840
D860
D880
R
Analog input operating status
D761
D781
D801
D821
D841
D861
D881
R
Analog input signal type
D762
D782
D802
D822
D842
D862
D882
R/W
Analog input data type
D763
D783
D803
D823
D843
D863
D883
R/W
Analog input data minimum value
D764
D784
D804
D824
D844
D864
D884
R/W
Analog input data maximum value
D765
D785
D805
D825
D845
D865
D885
R/W
Analog
Input
Ch 1
Analog input data
D766
D786
D806
D826
D846
D866
D886
R
Analog input operating status
D767
D787
D807
D827
D847
D867
D887
R
Analog input signal type
D768
D788
D808
D828
D848
D868
D888
R/W
Analog input data type
D769
D789
D809
D829
D849
D869
D889
R/W
Analog input data minimum value
D770
D790
D810
D830
D850
D870
D890
R/W
Analog input data maximum value
D771
D791
D811
D831
D851
D871
D891
R/W
Analog
Output
Analog output data
D772
D792
D812
D832
D852
D872
D892
R/W
Analog output operating status
D773
D793
D813
D833
D853
D873
D893
R
Analog output signal type
D774
D794
D814
D834
D854
D874
D894
R/W
Analog output data type
D775
D795
D815
D835
D855
D875
D895
R/W
Analog output data minimum value
D776
D796
D816
D836
D856
D876
D896
R/W
Analog output data maximum value
D777
D797
D817
D837
D857
D877
D897
R/W
– Reser ved –
D778
D798
D818
D838
D858
D878
D898
R/W
D779
D799
D819
D839
D859
D879
D899
R/W
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