Analog Output Test Function When Cpu Module Stops - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Precautions
With 'CH1 Output enable/disable flag' (Un\G70, b1) enabled, any CPU module change from RUN to STOP changes this flag
to Disable. The wave output signal also changes to wave output stop.
At this time, if the analog output HOLD/CLEAR function setting is the previous value, the analog output will hold the last output
value. If the analog output HOLD/CLEAR function setting is the setting value, the analog output will be the HOLD setting
value.
When the CPU module is set to RUN again, 'CH1 Output enable/disable flag' (Un\G70, b1) remains disabled. However, the
analog output will not be the offset value, and output of the previous value or HOLD setting value will continue.
When 'CH1 Output enable/disable flag' (Un\G70, b1) is enabled, the value selected in Wave output stopped selection is
output. Wave output does not restart.
Setting procedure
Set "Analog output HOLD/CLEAR setting" to "Previous Value", "Setting value", or "CLEAR".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Module Parameter]  [Basic
setting]  [Analog output HOLD/CLEAR function]

Analog output test function when CPU module stops

Conducts an analog output test when CPU module stops.
The following functions are enabled also during the analog output test.
• Scaling function (Page 189 Scaling function)
• Shift function (Page 191 Shift function)
• Alert output function (Page 193 Alert output function)
If a digital value out of the setting range is written, a digital value setting range error (error code: 191H) will occur and the
check code will be stored in 'CH1 Set value check code' (Un\G400).
Operation
When the CPU module forcedly turns 'CH1 Output enable/disable flag' (Un\G70, b1) offon while it is STOP, the analog
output value changes from the offset value to the D/A-converted analog output value. After that, when 'CH1 Digital value'
(Un\G460) is updated, the analog output is also updated.
When the CPU module is STOP with the analog output HOLD/CLEAR setting set to CLEAR (0), there is the following
relationship between 'CH1 Output enable/disable flag' (Un\G70, b1) and the analog output value.
CPU module status
CH1 Output
enable/disable flag
(Un\G70, b1)
Analog output
value status
converted from digital value
*1 When the CPU module status changes to STOP, 'CH1 Output enable/disable flag' (Un\G70, b1) turns off.
*2 When the CPU module forcedly turns 'CH1 Output enable/disable flag' (Un\G70, b1) offon, the analog output value changes from the
offset value to the D/A-converted analog output value.
2 FX5-4DA
188
2.4 Functions
A D/A-converted value is output even when the CPU module is in STOP status.
RUN
*1
OFF
Analog output value
Offset value
Controlled by the analog output module
STOP
*2
ON
OFF
Analog output value
converted from digital value
RUN
ON
Analog output value
Offset value
converted from digital value