Balance-Less, Bump-Less Function - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U

6.10.2 Balance-less, bump-less function

The balance-less, bump-less function prevents overload caused by drastic change in the control output value
(MV) when the mode is changed over from AUTO mode to MANUAL mode (or from MANUAL mode to AUTO
mode).
The balance-less, bump-less function is automatically activated when the AUTO mode is switched to the
MANUAL mode, and does not require setting.
• Operation performed when the mode is changed over from AUTO mode to MANUAL mode
The control output value (MV) in the AUTO mode continues to be effective.
• Operation performed when the mode is changed over from MANUAL mode to AUTO mode
The control output value (MV) is changed over to a value automatically calculated based on the set value
(SV).
Example of operation
Control output value (MV)
AUTO mode
1) The mode is changed over from AUTO mode to MANUAL mode.
However, the control output value (MV) follows the control output value (MV) in the AUTO mode.
2) The control output value (MV) is manually changed.
3) Operation performed when the mode is changed over from AUTO mode to MANUAL mode.
The control output value (MV) becomes a value automatically calculated based on the set value (SV).
Associated buffer memory
BFM No.
CH1 CH2 CH3 CH4
#1 #2 #3
#54 #94 #134 #174 AUTO/MANUAL mode changeover
#55 #95 #135 #175 MANUAL output set value
MANUAL mode
1) 2)
#4 Event (b13 MANUAL mode transition completed flag)
AUTO mode
3)
Description
6 Introduction of Functions
6.10 AUTO/MANUAL mode changeover
Time
Reference
Subsection 8.2.2
Subsection 8.2.18
Subsection 8.2.19
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