Watlow PM LEGACY
™
Limit Controller • 31 • Chapter 2 Install and Wire
Link Status
Indicator
State
Summary Requirement
Steady Off
Not powered,
unknown link
speed
If the device cannot determine link speed or power is off, the
network status indicator shall be steady off.
Green - - - -
If cable is wired and connected correctly, the LED will be
Green.
DeviceNet™ Communications
CAN_L
V-
V+
CH
SH
CL
V-
T2
S2
R2
Slot B, E
V+
CAN_H
shield
Terminal Signal Function
V+ V+ DeviceNet™ power
CH CAN_H positive side of DeviceNet™ bus
SH shield shield interconnect
CL CAN_L negative side of DeviceNet™ bus
V- V- DeviceNet™ power return
• Communications instance 2
PM6[L,M] _ _J - [H,5] _ _ _ G_ _
DeviceNet LED Indicators
Viewing the control from the front and then looking on top two LEDs can be seen aligned vertically
front to back. The LED closest to the front is identified as the network (Net) LED where the one next
to it would be identified as the module (Mod) LED.
Network Status
Indicator
LED
Description
Off
The device is not online and has not completed the
duplicate MAC ID test yet. The device may not be
powered.
Green
The device is online and has connections in the es-
tablished state (allocated to a Master).
Red
Failed communication device. The device has de-
tected an error that has rendered it incapable of
communicating on the network (duplicate MAC ID
or Bus-off).
Flashing
Green
The device is online, but no connection has been
allocated or an explicit connection has timed out.
Flashing Red A poll connection has timed out.
Network Status
Module Status
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