Mitsubishi Electric MELSEC iQ-R Series User Manual page 27

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 characteristics 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 characteristics graph). If
the value exceeds the analog output practical range, the maximum resolution and accuracy may not fall within the range of
the performance specifications.
• 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, an out-of-range digital value error occurs if 'CH1 Output
enable/disable flag' (Y1) is turned on with the digital value "0".
A digital value setting range error (error code: 191H) occurs and 'Error flag' (XF) turns on, and the ERR LED lights.
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 Setting
value check code' (Un\G400).
• The scaling function is enabled only for the normal output. When the scaling function is enabled while the wave output
function is used, a scaling setting error in wave output mode (error code: 0B1H) occurs and 'Alert output signal' (XE) turns
on.
1 FUNCTIONS
25
1.7 Scaling Function
1