CONTROLLED AUTOMATION, INC.

CONSOLE TROUBLESHOOTING

AC START/STOP SWITCH

When the AC START/STOP switch is pulled up (start), a contact on the switch will close connecting 8L1 to a 115VAC input (AC_START_INPUT), which will turn on. When the computer sees that this input is on, it will turn on a corresponding output (AC_START_OUTPUT) for approximately 1/4 sec.

The wiring of this output will go through another set of contacts on the AC START/STOP switch that are closed only when the switch is in the pulled up (start) position. The wiring will then go out to the machine to the EMERGENCY STOP switches, if applicable, and to the coil of the CRM contactor. At this time there will be 115VAC across the coil of the CRM contactor and it should be on (8L2 is connected to the other side of the coil).

When the CRM contactor is on, 8L1 is connected to terminal CRMA via the auxiliary contact on the CRM contactor. This wiring then connects back to the AC START/STOP switch and keeps the circuit interlocked until one of the switch contacts is opened.

The 9L1 terminals are connected to a 115VAC input (AC_DETECT_INPUT). The computer monitors this input for loss of control voltage during part processing.

When the CRM contactor is on, 115VAC control voltage is present between terminals 9L1 & 9L2. All of the machine outputs are connected to this. The control voltage (CRM) must be on before any machine operation, either manually or automatically, can be performed.

See DWG.#XXX-953A for schematic.