Controller Status
|
RIO Head Status
|
Detected Error Type
|
Description
|
---|---|---|---|
Stop
|
All LEDs off except Ready on and Com Act blinks four times
|
Controller
|
A detected interface error occurred.
|
Offline
|
All LEDs off except Ready on
|
Fiber Optic connection between PLCs
|
A communication error was detected.
|
Stop
|
RIO Head
|
A communication error was detected.
|
|
Stop
|
Ready on and Com Act blinks four times
|
RIO Cable becomes inoperative at Primary CPU End
|
In a dual cable system, if only one cable is inoperative, the Error A or Error B LED on the RIO Head lights up instead of stopping the system.
NOTE: When the RIO cable becomes inoperative at the Primary CPU end, the input data may be reset to 0 for one scan because the communication interruption to the drop occurs before the broken link is detected. |
Controller Status
|
RIO Head Status
|
Detected Error Type
|
Description
|
---|---|---|---|
Stop
|
All LEDS off except Ready on
or
Ready on and Com Act blinks once a second
|
Controller
|
A detected Interface error occurred.
|
Offline
|
Ready on and Com Act stops blinking
|
Fiber Optic connection between both controllers
|
A detected communication error occurred.
|
Stop
|
Com Act displays detected error pattern
|
RIO Head
|
After replacing the module and cycled power, to ensure that the controllers have identical application programs, perform an application program update.
|
Stop
|
Ready on and Com Act blinks four times
|
RIO Cable becomes inoperative at Standby CPU end
|
In a dual cable system, the RIO Head gives no indication if only one cable has become inoperative.
|
Offline
|
Com Act on
|
Either type of fiber link interruption:
|
|