Operator's Guide

Operator’s Guide 9
Module Status Lights
Each module (except for the Input and Output modules) has a status light
located on the front panel to alert the operator when the module needs
attention. When the light is either flashing or solid on, refer to the error
message on the Controller screen for more information.
Module Warning Labels
When working around the system, observe the following warning and caution
labels affixed to various areas on the equipment.
Computer BIOS Battery
The motherboard in the Controller computer contains a battery backup for the
system BIOS. If the battery is improperly connected, damage to the
motherboard can result. Replace the battery with only the same or equivalent
type recommended by the manufacturer. Dispose of used batteries according
to the manufacturer’s instructions.
Flashing light—Module error
or failure in normal operation;
failure in module firmware.
Light on, but not flashing—
Supplies are low or the
module is in a paused state.
No light—Module is running
normally or power is off.
When a module error occurs, the other modules process their current
tasks until completed. At that point, the system enters a paused state
(all module status lights are on, but not flashing).