C500BC061 Omron, C500BC061 Datasheet - Page 121

• Manufacturer Part Number: C500BC061
• Description: BACKPLANE
• Manufacturer: Omron

Specifications of C500BC061

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Troubleshooting
4090 IF LEN(FCS$)=1 THEN FCS$=”0”+FCS$
4100 RETURN
5-4
RUN indicator does not
light. (When power is
applied to the Host
Link Unit, and the reset
is released, the indica-
tor should illuminate.)
RCV indicator does not
blink. (When a signal is
input at the receive
connector, the indicator
should blink regardless
of the nature of the sig-
nal.)
XMT indicator does not
illuminate after the
RCV indicator. (If the
Unit number on the
computer side matches
that of the Host Link
Unit, the Host Link Unit
receives the termina-
tor, the CTS signal
then goes ON, and the
Host Link Unit sends
data irrespective of its
nature.)
ERR indicator illumi-
nates.
Although the XMT indi-
cator illuminates, the
Host Link Unit cannot
send a response to the
host computer.
RUN
indicator
blinking.
(C200H-
LK101-PV1/
LK201-V1/
LK202-V1
only)
Problem
Troubleshooting
Error in-
dicator
not lit.
Error in-
dicator
lit.
Power is not applied to the PC.
Faulty contact in the connector between
the PC and the Host Link Unit.
PC is resetting the Host Link Unit.
Host Link Unit is defective.
No signal is being output form the host
computer.
The signal from the host computer is not
reaching the Host Link Unit.
The indicator circuit is defective.
The unit numbers of the computer and the
Host Link Unit do not match.
The Host Link Unit is not receiving a termi-
nator.
The signal is ignored because the Host
Link Unit cannot correctly read it.
•
er and the Host Link Unit do not match.
•
•
tance.
Parities or transmission codes don’t match.
Error in operating level setting.
Parity error (even parity).
Framing error.
Overrun error.
Occurrence of momentary power failure.
Operation error on the host computer side.
•
•
The correct signal is not reaching the host
computer.
•
•
•
Error in unit number, transmission speed,
command level, parity, or transmission
code setting.
Error detected between the Host Link Unit
and CPU.
Transmission speeds of the host comput-
Incorrect wiring.
Incorrect setting for the termination resis-
I/O channel processing error.
Program error.
Cable damage.
Incorrect cable wiring.
Faulty contact in connector.
The following troubleshooting guide outlines the basic steps for remedying the
errors most likely to occur when using Host Link Units.
Possible Cause
Apply power to the PC.
Check and repair connections.
Turn the PC OFF, then ON. If
necessary, check the PC for an error
or abnormal reset.
Replace the Host Link Unit.
Check the program and output of the
host computer.
Check the wiring:
•
•
•
•
If the signal is being transmitted and
received normally, the Host Link Unit
is faulty and needs to be replaced.
Check the unit number settings.
Check whether the host computer is
outputting a terminator.
Check the settings of the Host Link
Unit and the Link Adapter.
Check the wiring for the CTS signal.
Check the parity or transmission
code settings.
Check the operating level settings.
Send correct data. If a momentary
power failure occurs, both the PC
and the Host Link Unit are reset and
initialized. The ERRor indicator will
turn off.
---
Correct the setting and restart the
Host Link Unit.
Turn power off and then back on.
Replace the Host Link Unit.
Cable not connected?
Cable damaged?
Cable incorrectly connected?
Faulty contact in connector?
Remedy
Section 5-4
Sections 1
and 2
Section 2
Section 1
Section 2
Sections 2
and 3
Section 2
Section 2
Reference
105