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FX2N-2LC Temperature Control Block
5.4
Auto / manual
5.4.1
Auto mode and manual mode
The mode can be changed over between "auto" and "manual". In the auto mode, the control
output value (MV) is set to the output quantity automatically calculated in accordance with the
temperature set value (SV). In the manual mode, the control output value (MV) is set to the
output quantity set arbitrarily and manually.
In the manual mode, b13 (manual mode transition completion) of the event (CH1: BFM #1,
CH2: BFM #2) becomes "1" to notify the manual mode.
0.5 second is required to change over the mode. During changeover, the balance-less, bump-
less function is actuated.
Auto mode
In the auto mode, the measured value (PV) is compared with the temperature set value (SV),
and the control output (MV) is given by PID arithmetic operation.
This mode is selected when the FX
In the auto mode, the manual output value is always set to the output value (MV).
Manual mode
In the manual mode, the output (MV) value is fixed to a certain value.
By changing the manual output setting (BFM #19, BFM #28), the output value can be fixed to
an arbitrary value.
The manual output value can be changed while b13 of the event (CH1: BFM #1, CH2: BFM #2)
is "1" (that is, when the manual mode is selected).
Even in the manual mode, the temperature alarm function is effective.
-2LC is shipped.
2N
Introduction of Functions 5
5-6
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