Omron GRT1-ML2 Hardware Reference Manual page 117

Hardware reference
LED indicators
The LED indicators indicate the status of the communications of the
MECHATROLINK-II and the SI-T/V7 Unit.
A. Run
B. TX
C. RX
D. ERR
/i
Name Display Explanation
Color Status
RUN Green Lit Normal operation
- Not lit Communications CPU stopped, resetting hardware,
RAM check error, DPRAM check error, station address
setting error or Inverter model code error
ERR Red Lit Watchdog timeout error, communications error or reset-
ting hardware
Red Flashing ROM check error (once)*, RAM check error (twice)*,
DPRAM check error (3 times)*, communications ASIC
self-diagnosis error (4 times)*, ASIC RAM check error
(5 times)*, station address setting error (6 times)*,
Inverter model code error (7 times)*
*: indicates the number of flashes
- Not lit No communication error or self-diagnosis error
TX Green Lit Sending data
- Not lit Sending of data stopped, hardware reset
RX Green Lit Searching for receiving carrier
- Not lit No receiving carrier found, hardware reset
HARDWARE REFERENCE MANUAL
fig. 63
A B C D
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