Process controller sleep mode
If the PID control is activated, this function sets the drive in process controller mode to an energy-saving sleep mode when no power is required.
Details
A typical application for this function is a booster pump for water in a high-rise building. If no tenant opens the water tap or uses the shower for a longer period of time, the pump changes to the energy-saving sleep mode. This usually happens at night. Thesleep mode automatically ends as soon as a tenant opens the tap again. The pumps operates normally again until the condition for the sleep mode is pending again.
The conditions for activating and terminating the sleep mode can be set independently of one another in 0x4023:001 (P610.01) and 0x4023:006 (P610.06) (see the following tables).
In 0x4023:005 (P610.05), a delay time can be set for the activation. This is the minimum time the values must fall below or exceed the respective threshold before the sleep mode is activated.
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Condition for activating the sleep mode
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0
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Sleep mode deactivated.
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1
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Frequency setpoint
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<
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Frequency threshold
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( +
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Delay time
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)
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2
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Frequency setpoint
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<
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Frequency threshold
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( +
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Delay time
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)
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OR
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Current process variable
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>
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Feedback threshold
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( +
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Delay time
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)
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3
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Frequency setpoint
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<
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Frequency threshold
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( +
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Delay time
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)
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OR
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Current process variable
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<
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Feedback threshold
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( +
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Delay time
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)
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Condition for terminating the sleep mode
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0
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Frequency setpoint
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>
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Frequency threshold
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( +
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2 Hz hysteresis
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)
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OR
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PID error value
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>
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Bandwidth
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1
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Current process variable
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<
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Recovery threshold
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2
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Current process variable
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>
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Recovery threshold
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Parameter
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Address
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Name / setting range / [default setting]
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Information
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0x4023:001
(P610.01)
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PID sleep mode: Activation
(PID sleep mode: Activation)
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Condition for activating the sleep mode.
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0
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Disabled
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Sleep mode deactivated.
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1
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Output frequency < threshold
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(+ Delay time 0x4023:005 (P610.05))
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2
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Output frequency < threshold OR process variable > feedback threshold
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(+ Delay time 0x4023:005 (P610.05))
OR
(+ Delay time 0x4023:005 (P610.05))
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3
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Output frequency < threshold OR process variable < feedback threshold
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(+ Delay time 0x4023:005 (P610.05))
OR
(+ Delay time 0x4023:005 (P610.05))
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0x4023:002
(P610.02)
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PID sleep mode: Stop method
(PID sleep mode: Stop method)
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Selection of the stop method after activation of the sleep mode.
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0
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Coasting
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The motor has no torque (coasts down to standstill).
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1
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Deceleration to standstill
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The motor is brought to a standstill with deceleration time 1 (or deceleration time 2, if activated).
–
Deceleration time 1 can be set in 0x2918 (P221.00).
–
Deceleration time 2 can be set in 0x291A (P223.00).
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2
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Stop method set
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The stop method set in 0x2838:003 (P203.03) is used.
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0x4023:003
(P610.03)
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PID sleep mode: Frequency threshold
(PID sleep mode: Freq. thresh.)
0.0 ... [0.0] ... 599.0 Hz
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Frequency threshold for activating the sleep mode.
–
For comparing "output frequency < threshold" in case of selection 1 ... 3 in 0x4023:001 (P610.01).
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0x4023:004
(P610.04)
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PID sleep mode: Feedback threshold
(PID sleep mode: Feedback thresh.)
-300.00 ... [0.00] ... 300.00 PID unit
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Feedback threshold for activating the sleep mode.
–
For comparing "variable > feedback threshold" in case of selection 2 in 0x4023:001 (P610.01).
–
For comparing "variable < feedback threshold" in case of selection 3 in 0x4023:001 (P610.01).
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0x4023:005
(P610.05)
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PID sleep mode: Delay time
(PID sleep mode: Delay time)
0.0 ... [0.0] ... 300.0 s
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Minimum time for which the respective threshold must be underrun or exceeded before the sleep mode is activated.
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0x4023:006
(P610.06)
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PID sleep mode: Recovery
(PID sleep mode: Recovery)
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Condition for terminating the sleep mode.
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0
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Setpoint > threshold OR system deviation > bandwidth
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0x2B0E (P102.00) > 0x4023:003 (P610.03) (+ 2 Hz hysteresis)
OR
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1
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Process variable < recovery threshold
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2
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Process variable > recovery threshold
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0x4023:007
(P610.07)
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PID sleep mode: Bandwidth
(PID sleep mode: Bandwidth)
0.00 ... [0.00] ... 300.00 PID unit
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Range around the process controller setpoint for ending the sleep mode.
–
0.00 = bandwidth deactivated.
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0x4023:008
(P610.08)
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PID sleep mode: Recovery threshold
(PID sleep mode: Recovery thresh.)
-300.00 ... [0.00] ... 300.00 PID unit
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Termination threshold for sleep mode.
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Ramp times