Operation
4-22
P/N 7105144G
2008 Nordson Corporation
VersaBlue_NW
Undertemperature Interlock
The undertemperature interlock prevents the melter motors from being
switched on as long as the material is too cold and thus too thick. This could
damage the pumps.
The undertemperature interlock is active during every Heatup phase (status
display) and after every standby. Also refer to section Troubleshooting,
Undertemperature Fault Triggered. If the system ready delay time is
activated, this time must also have expired before the interlock is disabled.
Motor Startup Protection
The motor startup protection prevents the motors from starting up on their
own after heatup or after a fault. The melter goes to startup protection if the
condition for Motor running: All motors ON AND Enable motor is fulfilled.
When the system is ready again (status display), the motors can be
switched on again via the control panel or the interface Standard I/O.
Acknowledge Startup Protection
On the Control Panel
Press the key Switch on/off all motors (collective enable); startup protection
is acknowledged and all enabled motors run again.
Via Interface Standard I/O
Switch All motors ON/OFF from OFF to ON. All enabled motors run again.
Via Field Bus
Set Switch ON/OFF All Motors (Collective Enable) (Rising edge; refer to
Melter control: If bit 1 = 0, then set to 1. If bit 1 = 1, set to 0 then back to 1).
All enabled motors are running again.
or
Switch off all motors with the keys Switch motor on/off (individual enable) on
the control panel; the startup protection is acknowledged. If the key(s) is/are
touched again: The respective motor starts up again:
The same applies to acknowledgement via standard I/O or field bus with the
signal Enable motor for the individual motor.
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