GE LM10, Instruction Manual

Page: 49 / 106

CHAPTER 4: FUNCTIONALITY MOTOR START/STOP LOGIC
LM10 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–43
AUX. Sense 1 fault detects a welded contactor when the contactor fails to open within 0.4
seconds after the RUN1 O/P signal goes off.
FIGURE 4–5: Motor RUN1 Start/Stop Logic
Autorestart
DeviceNet
RUN1 command*
OR
S
Latch
R
RUN1 O/P
RUNNING#1
MOTOR STATUS
Relay O/P
DeviceNet
Stop command*
STOP PDU Command
Relay Trip
OR
RUN2 Start Command
Aux.Sense1 Switch Input
Aux.Sense 1 Time
Delay
Tpkp=0.1 to 25sec
AND
AUX.SENSE 1 FAULT
MOTOR STATUS:
Aux.Sense 1 Time
Delay
Treset= 0.4 sec
AND
OR
RUN1 Switch Input
RUN1 PDU Command
STOP Switch Input
Setting: Open Contactor Logic
Welded Contacts Logic
Motor STOP Commands
Motor RUN Commands
MODE change from
USER to CONFIG
De-assert RUN1
Switch Input **
Note:
* Devicenet Commands can be issued only if the Devicenet control switch input is asserted
** The Maintained switch setting should be set to ON