Yaskawa 545 PLC - Manual (Page 15)

4 OPERATION
14 MicroTrac Network Interface Card
4/12/94
MicroTrac
Network
Interface Card
Hub Card
The interface card has two LEDs which indicate the following:
Red – Indicates activity is present on this node. Should be blinking
or steady.
Green – Indicates that a token ring has been formed. Should be on
(blinking or steady).
On large systems, a multi-port expansion Hub card may be present in the
gateway card rack as a fourth card. If it is present, its LEDs signify the
following:
Red Light (at Each Port) – Indicates activity for each individual port.
If an active cable is connected to a port, the red light should be on.
Yellow – Indicates network configuration. Should be on only when
network configuration is changed (i.e. adding a node) or on power-up.
Red – Indicates total network activity.
RD 3056-10