3 Part Names and Functions
3 - 6
NX-series Communications Interface Units User’s Manual (W540)
The following table lists the possible states for this indicator and what they mean.
3-2-1 TS Indicator
Color Status Description
Green Lit • The Unit is operating normally.
• The Unit is ready for I/O refreshing.
• I/O checking is operating.
*1
*1. Refer to the manual for the Communications Coupler Unit for the status of the indicator on the Communications
Coupler Units when I/O checking is in progress.
Flashing at 2-s
intervals
• Initializing
• Restarting is in progress for the Unit.
• Downloading
Red Lit A hardware error, WDT error, or other critical error that is common to all
Units occurred.
Fl
ashing at 1-s
intervals
A communica
tions error or other NX bus-related error that is common
to all Units occurred.
--- Not lit • No Unit power supply.
• Restarting is in progress for the Unit.
• Waiting for initialization to start.
The TS indicator shows the current status of the
CIF Unit and the communications status with the
CPU Unit or Communications Coupler Unit.
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