Yaskawa Microtrac LAN ARCNET Active hub - Manual (Page 13)

OPERATION
9 What To Do When the Recon Indicator Lights Up
4/23/97
The following flowchart and corrective actions provide a systematic approach of
isolating the node(s) that generate RECONs. If after following these steps no
nodes have been isolated and RECONs continue, contact a MagneTe k
r e p r e s e n t a t i v e . What To Do
When the
Recon Indicator
Lights Up
Are
Power
Supply LEDs
‘ON’ and steady
(located on
backplane)
?
Is
Recon
LED
‘ON’
?
Are
there
any RED
Receive Activity
Indicator LEDs
(CR1 - CR4)
‘ON’
?
If blinking: Ensure that the proper
loading resistor assemblies are
installed in the backplane of the
chassis assembly.
For Hub Assemblies: MagneTek
P/N 05P00090-0397 (10 ohm, 5W)
should be installed into J1, and
MagneTek P/N 05P00090-0398
(56 ohm, 5W) should be installed
into J2.
For PLC gateway assemblies:
MagneTek P/N 05P00090-0398
(56 ohm, 5W) should be installed
into J2.
If ‘OFF’: Verify that 110 Vac power is
applied to power supply (i.e. is switch
ON, is incoming power hot, etc.).
Verify fuses. The unit includes two (2)
fuses. One fuse is located on the
power supply board. If needed,
replace this fuse with a 5MF2A250V
or equivalent. The other fuse is
located in the Input Power connector
assembly, between Power Switch and
IEC plug. A spare fuse is located
above the fuse holder. If needed,
replace this fuse with a T2AL250V
or equivalent.
If ‘OFF’ and 110 Vac is present
and fuses are not burnt:
The power supply is bad; so the
chassis assembly must be replaced.
For Hub assemblies: MagneTek
P/N 05P00090-0268 (PC chassis,
4 half slots, 65W P.S.).
For PLC gateway assemblies:
MagneTek P/N 05P00090-0273
(PC chassis, 3 half / 3 full slots,
65W P.S.).
Yes
Yes
No
No
No
Yes
Is
there
more than
1 MicroTrac
LAN node
powered
up
?
No
Yes
This is good.
There are no
Recons on the
Network.
The ARCNET
Active Hub will
indicate a
RECON when
there are no
LAN segments
connected to
the Hub, or
when 1 LAN
segment with
only 1 node is
powered up.
These are
valid
conditions.
There must be
at least 2
nodes
powered up for
token passing
to occur. If
only 1 node is
powered up,
there is no
node to pass
the token to,
so a RECON
will occur.
A
RD 90-279 © 1997 MagneTek, Inc. 97-04