Appendix 4 How To Change Resolution After Analog I/O Module Is Replaced - Mitsubishi Electric MELSEC-A/QnA Series Handbook

Appendix 4 How to Change Resolution After Analog I/O Module is
Replaced
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).
Resolution of A series
analog I/O module
1/4000
1/8000
1/12000
*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.
Present value
read condition
Resolution of Q series analog I/O module
Normal resolution
Current
mode
1/4000 1/12000
*1
–
FROMP H0 K11 D0 K1
/P D0 K2 D100
MOVP D100 D0
: Measure required by user, : Measure not required by user
High resolution mode
Voltage
1/16000
– –
*1 *1
–
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.
User range
(Voltage: 1/12000)
–
–
*2
App
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