M301L 31
14.2.5 SPEED REFERENCE SELECTION
AUTO/MAN vs. LOCAL/REMOTE
For the MC3000 Series drive, operating in standard (non-PID) mode, AUTO/MAN refers to
speed control, and LOCAL/REMOTE refers to START/STOP control. AUTOMATIC and
MANUAL speed control selection is affected by whether the drive is in LOCAL or REMOTE
mode, as described below. Refer to Section 19 - MC3000 PID SETPOINT CONTROL for
a complete description of drive operation when using the PID control function.
AUTO/MAN SELECTION IN LOCAL MODE
In LOCAL mode (keypad start/stop control), AUTOMATIC and MANUAL selection is
determined by Parameter 28 - AUTO/MAN. When Parameter 28 is set to A/M LOC or
A/M SPD, the AUTO/MAN key on the keypad is active and can be used to toggle between
MANUAL (keypad) and AUTOMATIC (0-10 VDC, 4-20 mA, or preset speeds) speed
control. This is done by pressing the AUTO/MAN key to select the desired mode, and
then pressing the ENTER key within three seconds to confirm the change.
When AUTOMATIC mode is selected, one of the TB-13 input selects must be programmed
to select the desired speed reference, and that TB-13 terminal must be closed to TB-2.
The drive will then respond to the automatic speed reference. If the contact closure is
not made between the TB-13 terminal and TB-2, the drive will remain in AUTO mode, but
speed control will default to the keypad. Therefore, if the Form C relay or open-collector
outputs are set to indicate AUTO/MAN mode, they will still indicate AUTO mode.
AUTO/MAN SELECTION IN REMOTE MODE
In REMOTE mode (terminal strip start/stop control), speed control is either selected using
the AUTO/MAN key (Parameter 28 - AUTO/MAN must be set to A/M SPD to do this), or
by using the TB-13 input selects.
If AUTOMATIC mode is selected using the AUTO/MAN key (Parameter 28 - AUTO/MAN
must be set to A/M SPD to do this), and a speed reference is not selected using one of
the TB-13 input selects, the drive will remain in AUTO mode, but speed control will default
to the keypad. Therefore, if the Form C relay or open-collector outputs are set to indicate
AUTO/MAN mode, they will still indicate AUTO mode.
If the drive is configured to select AUTOMATIC mode by using one of the the TB-13 input
selects, closing the TB-13 terminal to TB-2 selects AUTOMATIC mode, and opening the
TB-13 terminal selects MANUAL (keypad) mode. Therefore, if the TB-13 terminal is not
closed to TB-2, and the Form C relay or open-collector outputs are set to indicate AUTO/
MAN mode, they will indicate MANUAL mode.
0 - 10 VDC and 4 - 20 mA INPUT SIGNALS
TB-13A, TB-13B, and TB-13C can all be programmed to select 0-10 VDC or 4-20 mA input.
PRESET SPEEDS
TB-13A can be programmed to select SPEED #1, TB-13B to select SPEED #2, and
TB-13C to select SPEED #3. Closing any two of these terminals to TB-2 will select
SPEED #4. Refer to Parameters 1-4: SPEED #1 - #4 in Section 18 - DESCRIPTION
OF PARAMETERS.
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