Read the indicator lights, What’s next – Rockwell Automation 1771-DB BASIC MODULE User Manual
Page 38
Chapter
Installing the BASIC Module
1
1 -14
The BASIC module has 10 indicator LEDs:
This LED:
Indicates:
ACTIVE
the module mode and whether the BASIC module is receiving
power from the backplane
FLT
whether a system problem was detected during background
diagnostics
DH485
whether port DH485 on the BASIC module is active for
communication
BTLO
whether the voltage of the battery that backs up RAM is low
LED1
User definable. LED activated through the user program.
LED2
User definable. LED activated through the user program.
PT1X
whether port PRT1 on the BASIC module is transmitting signals.
PT2X
whether port PRT2 on the BASIC module is transmitting signals
PT1R
whether port PRT1 on the BASIC module is receiving signals
PT2R
whether port PRT2 on the BASIC module is receiving signals
Refer to Appendix C for more information on troubleshooting.
Using the
Communication
Ports
2
G
Overview
G
Communication Modes
G
Hardware Handshaking
G
Communication Rates
G
Operating Modes
Read the Indicator Lights
CAppendix
What’s Next?