Wittke FEATHERWEIGHT, Maintenance Manual

Page: 163 / 171

Multiplexing
153
Node 50/60 Module Location
The module is located inside the hopper area behind the packer blade. It is mounted to the inside of
the front bulkhead RH side. The module can be accessed by opening the hopper door on the RH side
of the unit.
Figure 9 - 17 Node 50/60 module location
Connections and Module Condition
An item of importance on the multiplex control system is good, reliable connections at the multiplex
modules. The following pages provide guidance on properly checking the connections and module
condition.
When diagnosing multiplex module connectivity issues (fault “Node XX Disconnected” on the
display) on W
ITTKE
™ S
UPER
D
UTY
TM
and S
TAR
L
IGHT
TM
, basic checks must be made.
Verify that the module is correctly receiving/sending inputs and outputs; locate the LED light near
the wire connector; a module operating correctly will have a green, blinking light (commonly referred
to as a “heartbeat”) [see Figure 9 - 18]. If solid green light exists, not blinking, the module is not
running and will need to be restarted. If there is a fast-paced green blinking light, then the module has
lost its firmware and will need to be reprogrammed. If there is no light present, then the module is not
powering up/communicating, and further diagnostics on the wire routing will be required. If there is
a red LED light, this indicates a communication error.
N
OTE
: During the start-up or reset of the controller, the green and the red LEDs light simultaneously,
making the LED light look orange.