4-9SectionError Processing
107
4-9-4 Restarting Special I/O Units
There are two ways to restart Special I/O Unit operation after having changed
DM contents or having corrected the cause of an error. The first way is to power
up the PC again, and the second way is to turn the Special I/O Unit Restart Bit
ON and then OFF again.
Special I/O Unit Restart Bits
Bits
Functions
C200HX/HG/HE
C200H/HS
28100 AR 0100 Unit #0 Restart Bit
Turning the Restart Bit
.
28104 AR 0104 Unit #4 Restart Bit
28105 AR 0105 Unit #5 Restart Bit
28106 AR 0106 Unit #6 Restart Bit
28107 AR 0107 Unit #7 Restart Bit
28108 AR 0108 Unit #8 Restart Bit
28109 AR 0109 Unit #9 Restart Bit
28110 (See note.) --- Unit #A Restart Bit
28111 (See note.) --- Unit #B Restart Bit
28112 (See note.) --- Unit #C Restart Bit
28113 (See note.) --- Unit #D Restart Bit
28114 (See note.) --- Unit #E Restart Bit
28115 (See note.) --- Unit #F Restart Bit
Note SR bits 28210 to 28215 cannot be used with C200HE and C200HX/HG-
CPU3j-E/4j-E PCs.
If the error is not cleared even after turning the Special I/O Unit Restart Bit ON
and then OFF again, then replace the Unit.
4-9-5 Troubleshooting
The following tables explain the probable causes of troubles that may occur, and
the countermeasures for dealing with them.
Probable cause Countermeasure Page
The input is not set for being used. Set the input to be used. 81
The peak value function is in
operation.
Turn off the peak value function if it
is not required.
84
The input device is not working, the
input wiring is wrong, or there is a
disconnection.
Using a tester, check to see if the
input voltage or current is
changing.
74
Use Unit’s error codes to check for
a disconnection.
85, 105
Conversion Data Does
Not Change
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