29
Common Slave Specifications Section 3-1
3-1-2 MS and NS Indicators
This section describes the meaning of MS and NS indicators for the Slave
Units. The MS (Module Status) indicator displays the status of a node on the
network. The NS (Network Status) indicator displays the status of the entire
network. The MS and NS indicators can be green or red and they can be OFF,
flashing, or ON. The following table shows the meaning of these indicator
conditions.
The following diagram shows the indicator panel on a basic Slave Unit. The
position and status of the indicators, may change depending on the specific
Slave Unit.
Indica-
tor
Color Status Definition Meaning
MS Green ON Device
Operational
Normal operating status.
Flashing Device in
Standby
Reading switch settings.
Red ON Unrecover-
able Fault
Unit hardware error: Watchdog timer
error.
Flashing Minor Fault Switch settings incorrect, etc.
--- OFF No Power Power isn’t being supplied, waiting for ini-
tial processing to start, or the Unit is
being reset.
NS Green ON Link OK.
On-line,
Connected.
Network is operating normally (communi-
cations established)
Flashing On-line, Not
Connected
Network is operating normally, but com-
munications have not yet been estab-
lished.
Red ON Critical Link
Failure
A fatal communications error has
occurred. Network communications are
not possible. Check for a node address
duplication or Bus Off error.
Flashing Connection
Time-out
Communications timeout.
--- OFF Not Pow-
ered/
Not On-Line
Checking for node address duplication
on the Master, switch settings are incor-
rect, or the power supply is OFF.
To Next Page
Loading...
