GE 90-30 PLC Figure 2-2. States of the Ethernet Interface

2
2-18 TCP/IP Ethernet Communications User’s Manual - August 1997 GFK-1084B
Diagnostics
Pass?
No
Yes
Waiting for
Configuration from
PLC CPU
(max. 2 minutes)
Done
– Uses user defined Advanced Parameters
– Full support for client and server capability
– Uses default Advanced Parameters
– Client and server capability disabled
Operational
Maintenance
Load Request Caused By
– Restart Pushbutton pushed for 5–10 seconds
– Station Manager LOAD command issued
Maintenance Request Caused By
– Restart Pushbutton pushed for more than 10 seconds
– Station Manager MAINT command issued
Ethernet Interface
Initializing
(approx. 10 seconds)
Hardware
Failure
A
Load
Request or
Software
Corrupted?
No
Software
Load
B
Yes
IP address =
0.0.0.0
Yes Waiting for
IP Address
D
C
No
/ /
Maintenance
Request or
Fatal System
Error?
No
Maintenance
E
Yes / /
/
Operational
F
/ /
/
– Pressing the Restart button
– Storing a new configuration to the PLC with changes for the Ethernet Interface
– Powering-up the PLC
The Ethernet Interface is initialized by
– Issuing a Station Manager RESTART, LOAD, or MAINT command
Symbols
The symbols used for the LEDs are defined as follows:
= OFF
= ON
= Slow Blink; multiple slow blinking LEDs
blink in unison
= Fast Blink
= Traffic (blinks when there is traffic on the line)
The LEDs are labeled from top to bottom as follows:
OK
LAN
SER
STAT
Waiting for IP Address Caused By
– Not configuring Interface using Logicmaster 90
– New CPU with no configuration
– Configuring Interface with IP address = 0.0.0.0
– CPU failure to communicate with Interface
– Detection of corrupt software
The process symbols are defined as follows:
= Temporary condition; requires no intervention
= Decision point during power-up
= Interface State; normally the Interface remains
in a State unless there is user intervention
– Fatal System Error while in Operational State forced
– Internal System Error occurring when Interface is Operational
a restart
IP Address Received
Continue to Maintenance or Operational Caused By
– IP address received from network BOOTP server
– IP address entered by BOOTP Station Manager command
Figure 2-2. States of the Ethernet Interface