GE MM3, Instruction Manual, Page: 104 / 230

5–24 MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
S3 PROCESS CHAPTER 5: SETPOINTS
Motor Manager 3 sees this as a stop command and both contactor outputs will
open. This is useful in applications with limit switches, PLC control or hand/off/auto
(HOA) control.
• “TEST SWITCH”: This function is used to create a test switch facility. When the test
switch input is healthy statistical counters (see Counters on page 6–13) are not
incremented with the exception of the interlock counter. This is used when control
tests on the contactor are being performed and counters should not be updated. If
the motor is running when this switch is put into the healthy position, both
contactors will open.
• “REMOTE PERMISSIVE”: This function provides a means to interlock between the
keypad START A/B keys and the Start A/B switch inputs. When a remote permissive
switch is not used both of these start command sources will operate when the
MM3 Motor Manager 3 is in manual mode (Manual LED on). When the remote
permissive switch is healthy, the Start A/B switch inputs are functional but the
START A/B keys are disabled. When the remote permissive switch is unhealthy, the
START A/B keys are functional but the Start A/B switch inputs are disabled. Auto
mode or hard-wired auto mode (Auto LED on) disables both the Start A/B switches
and the START A/B keys.
• “COMMUNICATION SELECT”: This function provides a facility to override the keypad
AUTO / MANUAL keys. When this switch is healthy, the MM3 Motor Manager 3 is
forced into auto-serial mode (Auto LED on). When this switch is unhealthy, the MM3
Motor Manager 3 reverts back to the mode present before the switch was closed
(manual mode, Manual LED on; hard-wired auto mode, Auto LED on).
• “INTERLOCK COUNTER”: This function provides a means to count switch closures
when assigned to one of the programmable switch inputs. When the switch input
is put into the healthy position, the counter will increment by one (see
Counters on
page 6–13). See Interlock Names on page 5–27 for details on programming the
interlock counter name and units. The digital input coming into the MM3 Motor
Manager 3 must have an ON time no less than 100 ms and an OFF time no less
than 100 ms. This means that the MM3 Motor Manager 3 can count up to 5 pulses
per second = 5 Hz. The counter will count up to 65535 and then roll over. The
counter can be cleared with the
S1 CONFIGURATION
ÖØ
STATISTICS
ÖØ
CLEAR
INTERLOCK COUNTER
setpoint or via the serial communications link.
• “AUX RELAY 1 INHIBIT”: This function will override/inhibit auxiliary relay 1. When
healthy, it will prevent auxiliary relay 1 from turning on, or turn off auxiliary relay 1
after it is already on.
• “WYE-DELTA 1M CONTACT” and “WYE-DELTA 2S CONTACT”: These functions are
used as status feedback inputs for the wye-delta closed transition starter type. See
Wye-delta Closed Transition Starter on page 2–32 for details.
• “U/V RESTART INHIBIT”: This function disables the undervoltage restart feature
when the switch is in the healthy position and allows undervoltage restarts to take
place when the switch is unhealthy. Note that the undervoltage restart feature
must be activated for this interlock function to have any effect.
• “AUTO TRANS 2S CONTACT”: This function is used as a status feedback input for the
autotransformer open/closed transition starter type. See Autotransformer Open
Transition Starter on page 2–21 and Autotransformer Closed Transition Starter on
page 2–25.