Siemens 2000592-001 Benutzerhandbuch

Continued 

 

Each ANCB provides two Ethernet ports a 10BaseT and 10Base2. Each 
port is connected directly to an onboard Ethernet hub. The three LED’s 
labeled HUB in figure 4-2 (CL, BNC, TP) is the status indicator for this 
internal hub. The Hub LED’s are bi-colored LEDs and require careful 
observation of both the color and blink rate to determine the device 
status. Table 4-1 describes the color and blink rate to determine device 
and port status. 

The on-board Ethernet controller provides four status LED’s in Figure 
4-2. (Tx, Rx, CL, JAB) The Green TX LED blinks whenever a message is 
transmitted on the Ethernet channel. The Green RX LED blinks 
whenever a message is received on the Ethernet channel. The Red CL 
LED indicates there was a collision on the Ethernet. Note: collisions are 
a normal occurrence on an Ethernet network. However, excessive 
collision’s can be indication of a potential problem on the Ethernet. The 
Red JAB LED indicates that the Ethernet controller has determined that 
the transmitter has remained on for longer than allowed and indicates a 
possible hardware failure. 

Steady Green indicates a FIFO error 
Steady Red indicates a Collision on the HUB ports 
(Receiving on one port while transmitting another) 

Blinking Red indicates a packet is being transmitted. 
Blinking Green indicates a packet is being received. 
Alternating Red/Green indicates the 10Base2 port is  
Partitioned Out (Disabled). 

Steady Green indicates the 10BaseT port is receiving the Link 
Integrity Pulse (Keep Alive signal) 
Blinking Red indicates a packet is being transmitted. 
Blinking Green indicates a packet is being received.  
Steady Red indicates the Polarity is reversed on the 10BaseT 
port. 
Alternating Red/Green indicates the 10BaseT port is  
Partitioned Out (Disabled). 

 

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