Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 137)

KĆ19
a.) Using a voltmeter, verify that the power supply voltage
is within normal limits. (This step assumes that the
Power Supply in the the FiberĆOptic Rack is functional;
refer to section K3.2). The power status indicator on
the faceplate should be on. If it is off, unscrew the
captive screws on the faceplate and remove the
transceiver from the rack. Using a voltmeter, verify that
the rack is supplying 14 to 18 VAC through the plug in
the backplane. ReĆinsert the transceiver into the rack
securely. Replace the transceiver.
b.) Verify that the fiberĆoptic cables are connected
securely to the transceiver. Note that the LEDs on the
transceiver will flicker if it is sending/receiving
messages.
c.) Verify that the data signal wiring is connected securely
to the fourĆscrew terminal block as shown in figure
K2.4.
d.) If the transceiver is located at one of the extreme ends
of the rack, verify that the jumper is securely
connected between terminals 3 and 4 of the
transceiver's sixĆscrew terminal block.
K3.2 Power Supply Status Indicator is OFF
Problem: The green status light on the face of the Power Supply is
off. This light should be on to indicate the presence of power. If this
light is off, use the following procedure to isolate the cause.
Step 1.
Verify that the rocker switch on the front of the Power
Supply is in the ON position.
Step 2. Verify that the Power Supply is receiving correct input
power.
Step 3. Verify that the selector switch is in the appropriate
position (115 or 230).
Step 4. Turn off power to the FiberĆOptic Rack. Remove the fuse
from the Power Supply and, using an ohmmeter, verify
that the fuse is not blown. If the fuse is good, reĆinsert it
and continue with step 5
If the fuse is blown, replace it with the fuse type specified
in Appendix A.
Step 5. Turn on power to the rack. If the problem is not corrected,
replace the FiberĆOptic Rack and Power Supply.
K3.3 FiberĆOptic Link Adjustment
If a fiberĆoptic link between any two transceivers is longer than 1000
meters and the values in registers 15Ć18 increase consistently, you
may have to adjust the duty cycle of the the received signal on each
end of the link. Use the following procedure:
Step 1.
Disconnect all other links from the network.
Step 2. Connect an oscilloscope between terminals 1 and 2 on
the transceiver terminal block. The received signal
amplitude is approximately 4 volts peakĆtoĆpeak.