Meridian America Link/Customer Controlled Routing manual Meridian Link/CCR hardware

Chapter 4: Meridian Link/CCR hardware 59

There are four light-emitting diodes (LEDs) and two switches on the faceplate of the SBC card, as illustrated in Figure 16.

The LEDs show the following conditions:

¥Fail indicator This red LED is lit continuously when a hardware or software failure occurs on the SBC. It is normal for this indicator to flash while diagnostics are being run (after power-on or during rebooting).

¥Status indicator This yellow LED is lit when the MC68030 Status signal goes low. When steadily lit, the LED indicates that the processor has stopped. When applications are running, the LED is lit almost continuously but flickers every few seconds.

¥Run indicator This green LED is lit when the microprocessor executes a bus cycle. When applications are running, the LED is lit almost continuously but flickers every few seconds.

¥SCON indicator This green LED is always steadily lit to indicate that the SBC card is the VME bus system controller.

The switches perform the following functions:

¥ABORT switch This switch, when pressed, stops program execution and returns control to the debugger. Do not press this switch. If you accidentally press it, all software operations will stop and you will be in the firmware debugger. In this case, press the red RESET switch immediately to reboot the system. Software diagnostics during system boot will attempt to repair possible file system damage caused by the non-standard shutdown.

¥RESET switch This switch invokes a cold restart. The system performs a self test and then reboots. Do not press the switch while applications are running. Exit all applications and prepare the system for powering down before pressing the RESET switch. If the SBC card is the system controller, this switch also generates a VME bus system reset. The software power-down procedure is provided later in this guide.

Meridian Link Release 5C/CCR Release 3C Installation and Upgrade Guide