App - 6
This section describes how to change the resolution of an analog I/O module after the module is
replaced from A series to Q series.
(1) Resolution of A series and Q series analog I/O modules
Each A series analog I/O module have different resolutions. Please check the resolution of the module
in this handbook or user’s manual.
If the resolution differs between A series and Q series modules, it needs to be matched by a user (by
creating a sequence program or changing user range settings).
: Measure required by user, : Measure not required by user
*1 Change the resolution in a sequence program. (Refer to Appendix 4 (2).)
*2 Set a user range in high resolution mode.
(2) Example of sequence program to change a resolution
(Condition)
(a) Resolution of an A series analog I/O module: 1/8000
(b) Device that stores a present value read from the analog I/O module: D0
(c) Device that is used for resolution change operation: D100, D101
* Two-/four-word data is used in the four arithmetic operations instruction. Use unused device areas so that existing device
data are not affected by this operation.
Appendix 4 How to Change Resolution After Analog I/O Module is
Replaced
Resolution of A series
analog I/O module
Resolution of Q series analog I/O module
Normal resolution
mode
High resolution mode
User range
(Voltage: 1/12000)
Current Voltage
1/4000 1/12000 1/16000
1/4000 – ––
1/8000
*1 *1 *1
–
1/12000 – –
*2
Present value
read condition
H0FROMP K11 D0 K1
/P D0 K2 D100
D100MOVP D0
Read the present value of
Channel 1 from the buffer memory.
Divide the 1/16000 data by two.
Transfer the divided data to
the device.
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