Precautions For Analog I/O Module Migration - Mitsubishi Electric MELSEC-Q Series Migration Manual
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Also See for MELSEC-Q Series:
- User manual (834 pages) ,
- Reference manual (674 pages) ,
- Programming manual (624 pages)
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7.4
Precautions for Analog I/O Module Migration
Wiring
■Analog output module
The terminal layout differs between the Q66DA-G and the R60DA8-G.
To use the 40-pin connector of the Q66DA-G with the R60DA8-G, wiring needs to be corrected accordingly except the
external power supply pins (A19, A20, B19, and B20).
Dedicated instruction
There is no difference between the MELSEC-Q series and the MELSEC iQ-R series.
I/O signals and buffer memory areas
The layouts of I/O signals and buffer memory areas differ between the MELSEC-Q series and the MELSEC iQ-R series.
If I/O signals and buffer memory areas are used in the MELSEC-Q series program, the program needs to be corrected for the
MELSEC iQ-R series.
In Q compatible mode, the MELSEC-Q series program can be used as it is except for the differences in some signals and
functions.
Resolution mode switching function
7
The MELSEC iQ-R series modules do not support the resolution mode switching function because the resolution has already
been enhanced.
By using the scaling function, a converted value which is equivalent to that in the MELSEC-Q series can be determined.
Temperature drift compensation function
The MELSEC iQ-R series modules do not support the temperature drift compensation function because the accuracy has
already been enhanced. (The accuracy is comparable to that of the MELSEC-Q series with the temperature drift
compensation function used.)
If the function is used in the MELSEC-Q series program, the program needs to be corrected for the MELSEC iQ-R series.
Temperature conversion system
For the MELSEC iQ-R series, the setting value of the averaging processing in the temperature conversion system is changed
because the conversion speed is enhanced. If the processing is used in the MELSEC-Q series program, the program needs
to be corrected for the MELSEC iQ-R series.
Disconnection detection function
In the MELSEC iQ-R series digital-analog converter module (R60DA4, R60DAI8), this function is active all the time while the
analog output range is set to "4 to 20mA" and an error is output when an external wiring is disconnected. If this error detection
is not required, set other analog output ranges.
7 ANALOG I/O MODULE MIGRATION
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7.4 Precautions for Analog I/O Module Migration
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