Input Signals; Digital Inputs - Vacon NX ACTIVE FRONT END II Applications Manual

42 • Vacon
7.3

Input signals

7.3.1 Digital inputs

P2.3.1.1 Start Signal 1
Start signal, See Start/Stop Logic ID 300.
P2.3.1.2 Enable MCB Close
Enables MCB closing, false keeps MCB open even if required DC Voltage level has been
reached. With Control Options B00 MCB is also opened without need to discharge DC
link.
P2.3.1.3 Open MCB PowerDown ID1600
Signal FALSE status will stop the AFE unit and discharge DC.
System is powered down.
On keypad control pressing Stop button more than a 2 second will open the MCB.
P2.3.1.4 LCL Temp. X51
This parameter defines if the drive monitors the status of the LCL Fan of the unit. If the
monitoring function is used, the unit will give a warning if the LCL fan stops working and
LCL temperature reaches warning level.
Check from hardware if LCL is using X51 for fan monitoring or for LCL Temperature
monitoring. If hardware uses X51 for fan monitoring use this parameter if it is used for
LCL temperature monitoring use P2.3.1.10 LCL Temperature Monitoring X51.
This signal is normally used in cabinet installations. If status of the LCL fan is not
monitored in the syst
P2.3.1.5 LCL Temp. X52
This parameter defines if the drive monitors the status of the LCL over temperature
supply.
This signal is normally used in cabinet installations. If LCL Over temperature monitoring
P2.3.1.6 MCB Status
This parameter defines what input is used to monitor status of the MCB of the unit. If
feedback does not correspond the control signal within 4 second time delay drive will
indicate MCC Fault and will not be able to start until proper feedback is give. If feedback
is lost during run state fault is immediate and MCB Open command is given.
NOTE! AFE needs feedback signal for correct operation. If feedback is not used there
will be 3 second delay after closing command before drive can be started.
ID403
ID1619
ID1179
ID1125
ID1453
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
arfiff05 Standard AFE-II