
B--63005EN/02
3. STAND--ALONE TYPE i SERIES HARDWARE
321
LED display when an error occurs (ALARM)
LED statuses j:Off J:On
No.
LED display
123
Board status
1 jJJ An MPU transfer error occurred.
2 JJJ A parity error occurred in the main memory.
NOTE
Any other pattern is displayed if an error occurs in the RISC
option.
LED display for communication status
Communication status (L5 to L8)
LED statuses f:Off F:On l: Blink Z: Don’t care
No. LED display Communication status
1 ZZ
ZF
Data transmission in progress
2 ZZ
FZ
Data reception in progress
3 ZF
ZZ
Hub normally connected
Communication status (COL)
No. LED display Communication status
1 F Lit when a data collision occurs.
COL: This LED is frequently lit if the traffic of Ethernet communication is large
or if the peripheral noise is large.