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Installing and Operating the Module 3 - 21
LED and Network Verification
Once the module is installed, verify its operation through the front panel of
the ONline Controller Module. The Controller Module is equipped with an
LED test button on the front panel. Use the LED test button to verify LED
operation and verify network assignment.
When you press this button, the Controller Module initiates a test to all
modules in the concentrator. All LEDs should respond by lighting
continuously for approximately five seconds. Any LED that does not light is
defective.
After the five seconds elapse, the diagnostic continues with a network
check of all modules. Each Status LED should respond by blinking the
number of times to correspond with the network to which the module is
assigned. The network check sequence repeats five times. If a module is in
isolated mode, the Status LEDs on the module remain off. The Activity LED
remains on during the network check sequence. This test does not disrupt
network operation. Table 3-5 explains the network check codes
Table 3-5. Network Check Codes
LED State Network Configuration
1 Blink Module is configured for network 1
2 Blinks Module is configured for network 2
3 Blinks Module is configured for network 3
Off Isolated (module operates independent of
any network)