Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 97)

Chapter 8
Troubleshooting and Maintenance
8–2
Table 8.A
Troubleshooting (cont’d)
Problem Probable Cause(s) Corrective Action(s)
Displayed messages are not full brightness.
1. DL50 has entered reduced brightness
mode. Refer to Chapter 2 for a description
of this mode.
2. Dirty display window.
1. Check that the ambient temperature is
within specification provided in Chapter 10.
Lower ambient temperature if possible.
2. Clean window as described in this chapter.
Messages “BAD CODE CHECKSUM Waiting
for host ” and“ Slave Addr: XXX ” are displayed
alternately.
1. Corrupted firmware.
2. Dipswitch S3-8 set incorrectly.
1. Use bootstrap mode and firmware diskette
to re-install firmware. Refer to Chapter 7
for instructions.
2. Set dipswitch S3-8 to OFF position.
Sections of messages are not displayed.
1. Loose connections.
2. Faulty display board.
1. Use the wiring diagrams in Appendix F to
check for loose connections.
2. Use the display test to check the operation
of the LEDs. Have qualified service per-
sonnel replace faulty display boards. Refer
to Table 8.B.
Large text message on a Catalog No.
2706-F11J, -F11JC DL50 from a DL20 / DL40
master is incomplete. 1. Wait time on master is insufficient for a
complete scroll.
2. Scroll attribute of DL20/DL40 is set to
YES.
1. Set master wait time for at least 4 se-
conds.
2. Turn off scroll attribute.
No message or long delay before large text
message from a DL20 / DL40 master is dis-
played on a Catalog No. 2706-F11J, -F11JC
DL50. 1. Scroll attribute of DL20/DL40 is set to
YES.
1. Turn off scroll attribute.
Troubleshooting
(Continued)