Table of Contents
Advertisement
LED INDICATORS
RUN
TX0
RX0
TX1
RX1
40
M4RTU/M4IO User's Guide
LED
Indication
Processor status
COM0 transmit
COM0 receive
COM1 transmit
COM1 receive
Light ON: Normal function
Light OFF: Processor powered down.
Light blinking: Processor malfunction or low power supply voltage.
Light ON: COM0 transmitting serial data
Light OFF: Port is idle, wiring problem, or CTS is low.
Light ON: COM0 receiving serial data
Light OFF: Port is idle or wiring problem exists.
Light ON: COM1 transmitting serial data
Light OFF: Port is idle or wiring problem exists.
Light ON: COM1 receiving serial data
Light OFF: Port is idle or wiring problem exists.
Details
Advertisement
Table of Contents
