Lenze MCH Series Drives Metasys N2 - Manual (Page 13)

RG-MHMET 10
N2 Points
4.4 Analog Output (AO) Point Descriptions
Point Description
3-01: Acceleration Rate
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). It sets the value in Drive Parameter
8 (Accel Rate). The maximum value for this point is 3600.0 seconds. The minimum value is
either 0.1 sec, 0.3 sec or 0.6 sec depending on the horsepower of the drive. For the actual
minimum boundary, refer to the MCH Installation and Operation Manual (MH01).
3-02: Deceleration Rate
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. It sets the value in Drive Parameter
9 (Decel Rate). The maximum value for this point is 3600.0 seconds. The minimum value is
between 0.1 sec and 4.0 sec 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 (MH01).
3-03: Source Select
This point is used to set the HOA reference for the speed or setpoint command.
A setting of NORMAL (0) will cause the drive to use the source that corresponds to the
drive’s current HOA status. If the HOA is HAND (or was HAND prior to an OFF condition),
the drive will follow the source dictated by Drive Parameter #29 (Hand Source). If the HOA
is AUTO (or was AUTO prior to an OFF condition) the drive will follow the source dictated by
Drive Parameter #24 (Auto Source).
A setting of HAND ONLY (1) will cause the drive to use the source dictated by Drive
Parameter #29 (Hand Source) regardless of the drive’s HOA status.
A setting of AUTO ONLY (2) will cause the drive to use the source dictated by Drive
Parameter #24 (Auto Source) regardless of the drive’s HOA status.
One use for this point is to allow the user to toggle between OPEN loop speed control
and CLOSED loop PID control when PID mode is ENABLED (See Point 2-01). The ability to
command this point through the N2 network is dictated by Drive Parameter #30 (Control)
and the drive HOA (See Point 1-07). If this point is not being overridden, this value can also
be set using the SPEED SOURCE and ENTER keys on the drive keypad.
NOTE: If the SPEED SOURCE key on the drive keypad is currently changing the source
selection, serial override commands of this point will not be accepted.
3-04: Keypad Speed Command
This point monitors and controls the Keypad Speed Command. The ability to command this
point through the N2 Network is dictated by the setting of Drive Parameter #30 (Control) and
the drive’s current H/O/A Mode (Refer to Point 3-03). If this point is not being overridden,
this value can also be set using the drive’s MOP function or the UP and DOWN arrow keys
on the drive keypad.
NOTE: If the MOP function or the drive keypad is currently changing the keypad speed
command, serial override commands of this point will not be accepted.