Allen-Bradley Series B - Maintenance and Troubleshooting

A–B
8
Chapter
8–1
Maintenance and Troubleshooting
Troubleshooting guidelines are presented in this chapter.
!
ATTENTION: No user maintenance of the decoder is required.
Do not open the enclosure!
Follow these steps to replace the decoder’s fuse.
Step 1. Turn the decoder OFF.
Step 2. Remove power cable from decoder to gain access to fuse housing.
Step 3. Remove the fuse housing from its enclosure with a small flat–head
screwdriver.
Step 4. Lift black prong of the housing and at the same time slide metal fuse
holder out of black plastic jacket.
Step 5. Replace the blown fuse with a 1/4x 1 1/4 inch
or 5 x 20 mm, 1 amp, time delay fuse.
Upon sending the escape sequence Esc – y <n> P, the new configuration of
the serial port is immediately effective. Your host must be able to switch
communications parameters to maintain communications.
If you have problems communicating with the decoder, scan the Fixed Serial
Port At Reset symbol. The decoder will be returned to its default
configuration of:
Baud Rate 9600
Parity 0
Stop Bits 1
For more information on serial port configurations, refer to Chapters 5 and 6,
under the tab Serial Port Configuration.
Chapter Objectives
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Replacing the Fuse
Communications