Troubleshooting
Special I/O Unit Restart Bits (AR)
Turn OFF → ON → OFF the Special I/O Unit Restart Bits in the following circumstances:
• After DM data has been set or replaced.
• To restart Unit operation after clearing an error.
The same effect can be achieved by turning ON → OFF → ON the power to the PC and then turning it on again.
Bit
AR 0100
AR 0101
AR 0102
AR 0103
AR 0104
AR 0105
AR 0106
AR 0107
AR 0108
AR 0109
44
Item
Unit #0 Restart Bit
Unit #1 Restart Bit
Unit #2 Restart Bit
Unit #3 Restart Bit
Unit #4 Restart Bit
Unit #5 Restart Bit
Unit #6 Restart Bit
Unit #7 Restart Bit
Unit #8 Restart Bit
Unit #9 Restart Bit
Note SR 28100 to SR 28115 can also be used for unit numbers 0 to 15 for the
C200HX/HG/HE.
Function
Special I/O Units can be restarted by turning the
corresponding bits OFF → ON → OFF.
di
bi
OFF
Section 3-3
y
g
ON
OFF