Lenze MCH Series Drives Siemens P1 - Manual (Page 13)

RG-MHSP1F 10
P1 Points
Point 18: This point is for monitoring the current PID Feedback value at the input specified by Drive
Parameter #74 (PID Feedback). This point is displayed in the drive’s internal PID units with a
range of 0-32736. A value of 0 represents the lower of Drive Parameter #75 (Feedback @ Min)
and Drive Parameter #76 (Feedback @ Max). A value of 32736 represents the higher of Drive
Parameter #75 (Feedback @ Min) and Drive Parameter #76 (Feedback @ Max).
If the user wishes to view this point in other than internal units, the point can be rescaled with
different slope and intercept values during characterization. The new intercept value should
be the minimum value of the desired display range. The new slope should be calculated by
dividing the desired display range by 32736. For example, a display range of –100 PSI to +100
PSI would require an intercept value of –100 and a slope of (200/32736=) 0.0061095.
Point 20: This point contains the override time in hours. This value will be available for reading and
writing by the FLN but has no purpose in the MCH Series P1 drive.
Point 21: This point indicates the direction in which the drive is currently running.
Point 23: This point indicates whether or not the drive is currently running.
Point 24: This point reflects the last serial START(RUN)/STOP command that was issued to the drive.
Point 29: This point contains the current occupancy mode of the application. This value will be available
for reading and writing by the FLN but has no purpose in the MCH Series P1 drive.
Point 31: This point sets the time that it will take for the drive to ramp up the motor from 0.00Hz to
the value set in Drive Parameter #18 (Base Frequency). The maximum value for this point is
3000.0 seconds. The minimum value is either 0.1 seconds or 0.3 seconds depending on the
horsepower of the drive. For the actual minimum boundary, refer to the MCH Installation and
Operation Manual.
Point 32: This point sets the time that it will take for the drive to ramp down the motor from the value
set in Drive Parameter #18 (Base Frequency) to 0.00Hz. The maximum value for this point is
3000.0 seconds. The minimum value is between 0.1 seconds and 2.0 seconds depending on
the voltage rating and horsepower of the drive as well as the presence of a dynamic brake. For
the actual minimum boundary, refer to the MCH Installation and Operation Manual.
Point 34: This point mimics the functionality of the SPEED SOURCE key on the drive keypad. It is used
to determine whether the drive will get its speed/setpoint reference from Drive Parameter #24
(Auto Source) or Drive Parameter #29 (Hand Source). A value of 0 corresponds to NORMAL. A
value of 1 corresponds to HAND ONLY. A value of 2 corresponds to AUTO ONLY.
For more information refer to Section 14.2.4 Speed Source Selection of the MCH Installation
and Operation Manual.
This point allows the user to toggle between OPEN loop speed control and CLOSED loop PID
control when PID mode (Point 16) is ENABLED. The ability to command this point through the
FLN is dictated by the setting of Drive Parameter #30 (Control) and the drive’s current H/O/A
Mode (Point 15).