Mitsubishi Electric MELSEC iQ-R Series User Manual page 32

Precautions
• When the scaling function is used, the digital value can be set to a value out of the range between the scaling upper limit
value and scaling lower limit value (in the dotted lines in the I/O conversion characteristic graph) before being scaled.
However, use the scaling function within the range of the analog output practical range (in the solid line in the I/O
conversion characteristic graph). If the value exceeds the analog output practical range, the maximum resolution and
accuracy may not fall within the range of performance specifications. ( MELSEC iQ-R High Speed Digital-Analog
Converter Module User's Manual (Startup))
• The default digital value "0" may not be appropriate, depending on the scaling function setting. In particular in the examples
of when the output range is 0 to 5V, a digital value setting range error (error code: 191H) occurs if 'CH1 Output enable/
disable flag' (Y1) is turned on with the digital value "0". Therefore, set an appropriate digital value within the scaling range
before turning on 'CH1 Output enable/disable flag' (Y1).
• When using the user range, note that the scaling lower limit value is equal to the offset value.
• When the scaling function is enabled and the digital value after the scaling conversion is out of the digital setting range, a
digital value setting range error (error code: 191H) occurs and the corresponding check code is stored in 'CH1 Set value
check code' (Un\G400).
1 FUNCTIONS
30
1.7 Scaling Function