516
Error Processing Section 11-2
Other Errors
Peripheral Port Communications Error
A communications error has occurred in communications with the device con-
nected to the peripheral port if the indicators have the following conditions.
Check the setting of pin 4 on the DIP switch and the peripheral port settings in
the PLC Setup. Also check the cable connections.
RS-232C Port Communications Error
A communications error has occurred in communications with the device con-
nected to the RS-232C port if the indicators have the following conditions.
Check the setting of pin 5 on the DIP switch and the RS-232C port settings in
the PLC Setup. Also check the cable connections. If a host computer is con-
nected, check the communications settings of the serial port on the host com-
puter and the communications program in the host computer.
CPU Bus
Unit Setup
error
CPU BU
ST ERR
0400 to
040F
A40203:
CPU Bus
Unit Set-
ting Error
Flag
A427: CPU
Bus Unit
Setting
Error, Unit
Number
Flags
An installed CPU Bus Unit
does not match the CPU
Bus Unit registered in the I/O
table.
The corresponding flag in
A427 will be ON. Bits 00 to
15 correspond to unit num-
bers 0 to F.
Change the registered I/O table.
Special I/O
Unit Setup
error
SIOU
SETUP
ERR
0500 to
055F
A40202:
Special I/O
Unit Set-
ting Error
Flag
A428 to
A433: Spe-
cial I/O Unit
Setting
Error, Unit
Number
Flags
An installed Special I/O Unit
does not match the Special
I/O Unit registered in the I/O
table.
The corresponding flag in
A428 to A433 will be ON.
Bits A42800 to A43315 cor-
respond to unit numbers 0 to
95.
Change the registered I/O table.
Error Program-
ming
Console
display
Error
code (in
A400)
Flag and
word data
Probable cause Possible remedy
Power Supply
Unit Indicator
CPU Unit Indicators
POWER RUN ERR/ALM INH PRPHL COMM
ON ON --- --- OFF ---
Power Supply
Unit Indicator
CPU Unit Indicators
POWER RUN ERR/ALM INH PRPHL COMM
ON --- --- --- --- OFF
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