36
FORWARD and REVERSE ROTATION with ONE START CONTACT
1. Follow 1-4 above and wire a normally open momentary contact between TB-
2 and the common of a single-pole, double-throw toggle switch. Wire the
poles of the toggle switch to TB-12A and TB-13C. See the wiring diagram in
Section 15.3.
14.2.5 SPEED REFERENCE SIGNALS
The drive allows for three analog speed reference inputs: a speed potentiometer
(10,000 Ohm), 0-10 VDC, or 4-20 mA.
SPEED POT Connect the wiper to terminal TB-5A, and connect the high
and low end leads to terminals TB-6 and TB-2, respectively.
0-10 VDC Wire the positive to terminal TB-5A and the negative to
terminal TB-2. TB-5A input impedance is 200 kilohms.
4-20 mA Wire the positive to terminal TB-5B and the negative to
terminal TB-2. TB-5B input impedance is 100 ohms.
14.2.6 SPEED REFERENCE SELECTION
AUTO/MAN vs. LOCAL/REMOTE
In the MC Series drive, AUTO/MAN refers to speed control, and LOCAL/
REMOTE refers to START/STOP control. AUTOMATIC or MANUAL speed
control selection is affected by whether the drive is in LOCAL or REMOTE
mode.
In LOCAL mode (keypad start/stop control), AUTOMATIC and MANUAL
speed control is selected using Parameter 28 - AUTO/MAN. When AUTO/
MAN is set to BOTH, the AUTO/MAN button on the keypad is active and is
used to toggle between MANUAL (keypad or speed pot) and AUTOMATIC (0-
10 VDC, 4-20 mA, or preset speeds) speed control. When set to MANUAL,
speed control is governed by Parameter 29 - MANUAL, which selects either
KEYPAD or 0-10 VDC (speed pot). When set to AUTOMATIC, one of the TB-
13 input selects must be set to the desired speed reference, and that terminal must
be closed to TB-2. The drive will then respond to the automatic speed reference.
If one of the TB-13 input selects is set for a speed reference, and the contact
closure is not made to TB-2, speed control will remain in AUTO mode, but the
drive will respond to the keypad or speed pot, depending on Parameter 29 -
MANUAL. Therefore, if the Form C relay or open-collector outputs are set to
indicate AUTO/MAN mode, they will still indicate AUTO mode.
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