Mitsubishi Electric MELSEC iQ-R Series User Manual page 34

Precautions
• The setting of the shift function is enabled during the rate control.
• When the alert output function is enabled, the alert determination is performed to the set 'CH1 Digital value' (Un\G460).
Note that an alert does not occur at the timing when the digital value changed by the rate control function exceeds the
upper/lower limit value.
• The rate control does not function during the analog output test for when the CPU module is in the STOP state.
• With Analog output HOLD/CLEAR setting set to a value other than HOLD, the analog output value changes when the CPU
module is in the STOP state but the rate control function does not function.
• When the CPU module status changes while the D/A conversion and D/A output are enabled and the analog output HOLD/
CLEAR setting is set to CLEAR, the rate control function operates as follows:
When the CPU module status changes from RUN to STOP (error), the rate control does not function. When the CPU
module status changes from STOP (error) to RUN, the rate control functions.
The digital input value
converted in analog
Analog output value
RUN
CPU module status
• When the CPU module status is changed from STOP (error) to RUN while the D/A conversion is enabled, the D/A output is
enabled, analog output is set to HOLD, and the rate control is enabled, the analog output is restarted from the offset value.
The digital input value
converted in analog
Analog output value
RUN
CPU module status
• When the D/A conversion is enabled and the D/A output is disabled, the rate control does not function.
• When a value out of the setting range is written to 'CH1 Digital value' (Un\G460) during the rate control, the rate control is
performed with the upper or lower limit value of the setting range.
In addition, the check result is stored in 'CH1 Setting value check code' (Un\G400).
• When the external power supply is turned off during the rate control, the rate control does not function and the analog
output value changes to 0V/0mA. When the external power supply is recovered, the rate control is restarted from the offset
value.
• The rate control function is enabled only for the normal output. When the rate control function is enabled while the wave
output function is used, a rate control setting error in wave output mode (alarm code: 0B3H) occurs and 'Alert output
signal' (XE) turns on.
1 FUNCTIONS
32
1.10 Rate Control Function
Offset value
STOP (error)
Offset value
STOP (error)
Rate control enabled
The digital input value
converted in analog
RUN
Rate control enabled
The digital input value
converted in analog
RUN