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10 CONTROL WIRE APPLICATIONS
10.3 HAND/AUTO CONFIGURATION
This control scheme is used when it is desirable to operate the starter manually and automatically. In the Hand
position the starter coil is energized via the START button and de-energized via the STOP button. In the auto
position the starter is energized automatically by the maintained PLC contact. When the PLC contact opens,
the motor stops.
To program the MM3 for three-wire hand / two-wire auto control (hand/auto configuration), set:
S3 PROCESS\PROGRAMMABLE INPUTS\INTERLOCK INPUT 1: TWO WIRE CONTROL
S3 PROCESS\PROGRAMMABLE INPUTS\INTERLOCK INPUT 2: AUTO PERMISSIVE
S3 PROCESS\PROGRAMMABLE INPUTS\INTERLOCK INPUT 3: AUTO START A
S3 PROCESS\STOP CONFIGURATION\FACEPLATE STOP: LATCHED
S3 PROCESS\STOP CONFIGURATION\PROCESS STOP: LATCHED
The INTERLOCK INPUT 1/2/3 setpoints were chosen to match the wiring diagram provided. Any of the
available Interlocks 1 through 10 could be programmed for TWO WIRE CONTROL, AUTO-PERMISSIVE, or
AUTO START A
NOTE
HAND:
•
In the hand position, the motor is available to start.
•
When the START button is pressed, the motor runs.
•
When the STOP button is pressed, the motor stops and a latched trip is generated. The motor cannot be
restarted until reset is pressed.
•
When the faceplate stop key is pressed, it causes a latched trip. The motor cannot be restarted until reset
is pressed.
AUTO:
•
In the auto position, the motor is available to start.
•
When the PLC contact closes, the motor runs.
•
When the PLC contact opens, the motor stops and a latched trip is generated. The motor cannot be
restarted until reset is pressed.
•
When the faceplate stop key is pressed, it causes a latched trip. The motor cannot be restarted until reset
is pressed.
•
Start commands from the faceplate, serial port and terminals 12,53 are blocked.
Terminal 11 (Stop input) must be closed to allow a start. The MM3 display will read "Motor Status Unavailable"
when the stop input is open.
If feedback is not received by the Contactor A Status N.O. input within 1 second of closing Contactor A output
relay, an OPEN CONTROL CIRCUIT alarm will occur. This will cause Contactor A output relay to open.
In the case of a faceplate or process stop trip, the start signal to Terminal 43 should be removed if restarting is
not desired. When the MM3 reset key is pressed, the motor will be restarted based on terminal 43.
The STOP button at the motor remains active in the auto mode.
GE Power Management
MM3 Motor Manager 3
10.3 HAND/AUTO CONFIGURATION
10.3.1 3-WIRE HAND / 2-WIRE AUTO
10.3.2 CONTROL OPERATION
10
10-9
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