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238
C200H I/O Link Units
Section 6-1
Status Area
The Status Area indicates the operating status of the C200H I/O Link Unit.
The meaning of each bit is as shown in the following diagram.
Bit
Name
ON
OFF
0
Incorrect Switch Settings/
EEPROM Error Flag
Turns ON when an incorrect switch set-
ting or an error in EEPROM is detected.
Turns OFF when the PLC or C200H I/O
Link Unit is restarted.
1
Node Address Duplication/
Bus Off Error Flag
Turns ON when the same node address
is set for more than one Unit or a Bus Off
(communications are halted by many
communications errors) error is detected.
Turns OFF when the PLC or C200H I/O
Link Unit is restarted.
2
PLC Mounting Error Flag
Turns ON when a PLC mounting error is
detected. (When another Communica-
tions Unit is mounted to the same PLC
and it’s Read/Write Area settings are set
to default.)
Turns OFF when the Read/Write Area is
set to user settings and the C200H I/O
Link Unit is restarted.
3
Network Power Supply Error
Flag
Turns ON when power OFF is detected in
the DeviceNet Network.
Turns OFF when the communications
power supply returns to a normal volt-
age.
6
Communications Error Flag
Turns ON when a DeviceNet communi-
cations error is detected.
Turns OFF when communications return
to normal.
8
Hold/Clear Write Area Data
for Communications Error
Flag
Turns ON when the Unit is restarted after
pin 3 on the front panel DIP switch has
been set to ON (Hold).
Turns OFF when the Unit is restarted
after pin 3 on the front panel DIP switch
has been set to OFF (Clear).
9
Read/Write Area Settings
Normal Completion Flag
Turns ON when changes to the Read/
Write Area settings have been completed
normally using software switch bit 0 or 1.
Turns OFF when software switch bits 0
and 1 are both set to OFF.
10
Read/Write Area Settings
Error Completion Flag
Turns ON when an error has occurred
attempting to make changes to the Read/
Write Area settings using software switch
bit 0 or 1.
Turns OFF when software switch bits 0
and 1 are both set to OFF.
12
Explicit Connection Estab-
lished Flag
Turns ON when an explicit connection
has been established with the Master
Unit.
Turns OFF when the explicit connection
with the Master Unit is broken.
13
Read/Write Area Default Set-
tings Flag
Turns ON when Read/Write Area default
settings are used.
Turns OFF when Read/Write Area user
settings are used.
14
Error Flag
Turns ON when any kind of error occurs.
(When Status bits 00, 01, 02, 06, or 10
are ON.)
Turns OFF when all errors have been
resolved. (When Status bits 00, 01, 02,
06, and 10 are all OFF.)
15
I/O Link Executing Flag
Turns ON when a connection is estab-
lished with the Master Unit.
Turns OFF when a connection with the
Master Unit is broken.
Bit
Not used
Incorrect Switch Settings/EEPROM Error
Node Address Duplication/Bus Off Error Detected
PLC Mounting Error
Network Power Supply Error
Communications Error
Hold/Clear Write Area Data for Communications Error
Read/Write Area Settings Normal Completion
Read/Write Area Settings Error Completion
Explicit Connection Established
Read/Write Area Default Settings
Error
I/O Link Executing
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