Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 199

Precautions
• The shift function setting is enabled also during rate control.
• If the warning output function is enabled, alarm judgment is made for the preset 'CH1 Digital value' (Un\G460). Note that it
is not the timing when the upper/lower limit is exceeded by rate control.
• Rate control does not function when the analog output test is in progress in the CPU module STOP state.
• If the analog output HOLD/CLEAR setting is other than the previous value, rate control does not function although the
analog output changes in the CPU module STOP state.
• The rate control function will be as follows if the CPU module changes its operation when D/A conversion is enabled, D/A
output is enabled, or analog output CLEAR is set.
When the CPU module changes from RUN to STOP (error): Rate control does not function.
When the CPU module changes from STOP (error) to RUN: Rate control functions.
The digital input value
converted in analog
Analog output value
RUN
CPU module status
• When D/A conversion is enabled, D/A output is enabled, or the analog output HOLD setting is the previous value or set
value if rate control is enabled, the analog output restarts from the offset value when the CPU module changes from STOP
(error) to RUN.
The digital input value
converted in analog
Analog output value
RUN
CPU module status
• When D/A conversion is enabled or D/A output is disabled, rate control does not function.
• During rate control, if a value out of the settable range is written to 'CH1 Digital value' (Un\G460), rate control is performed
with the upper and lower limit values of the setting range. In addition, the check result is stored in 'CH1 Set value check
code' (Un\G400).
• If the scaling function is enabled in the following cases, rate control is performed with the upper (-32768) or lower (+32767)
limit value.
For the range of -10 to +10 V: (Scaling upper limit value + Scaling lower limit value) / 2 exceeded the range of -32768 to
+32767.
For the range of other than -10 to +10 V: The scaling lower limit value exceeded the range of -32768 to +32767.
• If the external power supply turns off during rate control, the analog output changes to 0 V/0 mA with the rate control
function stopped. When the external power supply is then restored, rate control restarts from the offset value.
• If a disconnection is detected during rate control, the analog output changes 0 V/0 mA with the rate control function
stopped. When the disconnection is then restored and 'Disconnection detection flag' (Un\G38) is cleared, rate control
restarts from the offset value.
• The rate control function is enabled only for normal output. If the rate control function is enabled while the wave output
function is in use, a wave output mode rate control setting error (alarm code: 0B3H) will occur and 'Warning output signal'
(Un\G69, b14) turns on.
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
2
2 FX5-4DA
197
2.4 Functions