453
Failure Diagnosis Functions
Section 8-8
If the message output is selected, an error message can be displayed on the CX-
Programmer at the same time as a FAL error is generated for time monitoring.
Time Monitoring
Monitors whether output C goes ON with 10 seconds after input A. If C
doesn’t go ON within 10 seconds, a failure is detected and the Carry Flag
is turned ON. The Carry Flag executes the error-processing block. Also, an
FAL error (non-fatal error) with FAL number 004 is generated.
Logic Diagnosis
FPD(269) determines which input bit in block B is preventing output C from
going ON. That bit address is output to D1000 and D1001.
Auxiliary Area Flags and Words
Name
Address
Operation
Error Code
A400
When an error occurs, the error code is stored in
A400.
FAL Error Flag
A402.15
Turns ON when FAL(006) is executed.
FALS Error Flag
A401.06
Turns ON when FALS(007) is executed.
Executed FAL Num-
ber Flags
A360 to
A391
The corresponding flag turns ON when an
FAL(006) error occurs.
Error Log Area
A100 to
A199
The Error Log Area contains information on the
most recent 20 errors.
Error Log Pointer
A300
When an error occurs, the Error Log Pointer is
incremented by 1 to indicate where the next error
record will be recorded as an offset from the
beginning of the Error Log Area (A100).
Error Log Pointer
Reset Bit
A500.14
Turn this bit ON to reset the Error Log Pointer
(A300) to 00.
FPD Teaching Bit
A598.00
Turn this bit ON when you want the monitoring
time to be set automatically when FPD(269) is
executed.
C (Diagnostic output)
Carry Flag
(ON for timeout)
Control data
(FAL 004, bit address output for failure)
Monitoring time (0.1-s units): 10 s
First register word of diagnostics output
FPD
#0004
&100
D01000
Error-processing block
FPD(269)
execution condition A
Logic diagnosis
execution condition B
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
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Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
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