Mitsubishi Electric FR-F800 Series Instruction Manual page 464

 PID sleep boost (Pr.1366 to Pr.1368)
• The pump pressure can be increased before the PID output suspension function (sleep function) is activated. This function
is useful to prevent frequent repetition of starting and stopping of the pump, and to maintain the sleep state for a long period
of time.
• When the normal condition to activate the sleep function is satisfied (the output frequency is less than Pr.576 setting for
the time set in Pr.575 or longer), the PID set point automatically increases by the amount set in Pr.1366 Sleep boost level.
• When the measured value reaches to the set point during Pr.1367 Sleep boost waiting time, the sleep function is
activated. Then, the set point returns to its original value from the sleep boost set point. Then, the set point returns to its
original value from the sleep boost set point.
• When the measured value does not reach to the sleep boost set point after the time set in Pr.1367 passes, PID control
continues without activating the sleep function.
• When the deviation remains at the Pr.577 setting or higher for the time set in Pr.1368 Output interruption cancel time,
the inverter output restarts.
For reverse action
Set point
Deviation
Pr.577 - 1000%
Output frequency
Pr.576
SLEEP
 Check valve deceleration function (Pr.111 and Pr.1369)
• When the pump is stopped, slow deceleration can be applied to the predetermined section to prevent the water hammer
sound caused by closing the valve.
• The Pr.111 Check valve deceleration time setting is applied to the section between Pr.2 Minimum frequency and
Pr.1369 Check valve closing completion frequency.
Output frequency
Pr.127
(Pr.754)
Pr.2
Pr.1369
STF
PID
NOTE
• The check valve deceleration function is enabled when the PID setting is applied to the frequency.
• When the Pr.1369 setting is higher than the Pr.2 setting, the normal deceleration time (Pr.8 or Pr.45) setting is applied.
Downloaded from ManualsNet.com
Sleep boost level
(Pr.1366)
Measured value
Less than Pr.575 Pr.575 or more
PID
ON
ON
ON
search engine
Sleep boost waiting time
(Pr.1367)
The sleep status starts when the
deviation becomes 0 during the time
set in Pr.1367.
Output interruption cancel time
(Pr.1368)
Sleep period Sleep period Sleep period
ON
Normal deceleration time setting
Pr.8
(Pr.45)
Cancel level
Time
Check valve deceleration time setting
Normal deceleration
time setting
Time
Pr.111 Pr.8
(Pr.45)
5. PARAMETERS
5.11 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
463