Schneider Electric 174 CEV - Manual (Page 25)

Installing the Bridge Hardware
21
2.7
Verifying the Network Communication
Refer to Figure 8 for the locations of the bridge’s indicators.
2.7.1 Ethernet Card Indicators
The Ethernet card has an indicator that shows a valid connection between the
card’s RJ--45 (UTP) jack and the network. It has another indicator which flashes
to show’s the bridge’s communication activity on the Ethernet link.
Table 11 Ethernet Card Indicators
Indicator (Green) Status
RJ--45 Connection Valid Valid connection exists at RJ--45 port.
TCP/IP Network Active Bridge is actively communicating TCP/IP.
2.7.2 Modbus Plus Card Indicators
The Modbus Plus card has an indicator that flashes a repetitive pattern to show its
network communication status, plus two indicators which identify communication
errors on the two Modbus Plus cable paths. Note that one error indicator will be lit
normally in single--cable installations, showing that a second cable does not exist.
Table 12 Modbus Plus Active Indicator Patterns
Indicator Pattern (Green) Status
Six flashes/second Normal operating state. All nodes on a
healthy network flash this pattern.
One flash/second The node is off-line. After being in this state
for 5 seconds, the node attempts to go to its
normal operating state.
Two flashes, then OFF for 2 seconds The node detects the network token being
passed among other nodes, but it never
receives the token.
Three flashes, then OFF for 1.7 seconds The node does not detect any token passing
on the network.
Four flashes, then OFF for 1.4 seconds The node has detected another node using
the same address.
Table 13 Modbus Plus Channel Error Indicators
Indicator (Red) Status
Error Channel A Communications error at network port A.
Error Channel B Communications error at network port B.