SPPA T2000 - AS620-S5 Reset Automation Processor

Procedure (Teleperm XP)

In normal operation the AS should have one AP in MASTER MODE indicated by a permanently illuminated green RUN LED, and the other AP should be in STANDBY (SLAVE) MODE indicated by a flashing green RUN LED. No other LED's should be illuminated. If a fault occurs on the MASTER AP or if it is manually switched to STOP then the STANDBY AP will automatically take over as MASTER without any disruption to the process. On the S5 155H CPU there are two switches. The upper one has two latching positions; UP for RUN and DOWN for STOP. The lower switch has three positions;

UP for RESET, DOWN for OVERALL RESET and CENTRE for normal operation.
The lower switch is sprung so that it always returns to the centre position.

Reset of the AS

If a reset is performed on one of the redundant APs the AP goes into stop. After that the software program in the AP restarts and after a few minutes the redundant AP configuration is running again. If one AP is already in stop do not perform a reset on the other AP. This results in a loss of control of the automation system.

• Switch the CPU to STOP and observe that the red STOP LED is illuminated and the green RUN LED is out indicating that the CPU is in STOP. The red BASP LED should also now be illuminated indicating a BUS fault. Also ensure that the other AP has switched to or remained in master mode.

• Hold the lower switch at the RESET position.

• Switch the CPU to RUN.

• Let the RESET switch return to the centre position.

• Observe the RUN and STOP lights alternating a few times before both being illuminated together for a short time. The lights will both go out, then the green light comes on and goes off as the red light comes on .

• When the red light finally goes off the green RUN LED will begin to flash to indicate operation in standby mode but only if the other AP is operating in master mode indicated by a permanently illuminated green RUN LED.

Overall Reset of an AS.

An overall reset deletes the software from the AP. If a reset is performed after the overall reset the software will be reloaded form the redundant AP. If an overall reset on both AP´s is performed the automation system loses control over the process and the power station trips. Never perform an overall reset without permission as this may result in severe damage to the power station . If the memories of both AP's in an AS are cleared at the same time then it will be necessary to transfer the software from the ES to the AP's before it will be possible to operate the AS.

• Switch the CPU to STOP and observe that the red STOP LED is illuminated and the green RUN LED is out indicating that the CPU is in STOP. The red BASP LED should also now be illuminated indicating a BUS fault. Also ensure that the other AP has switched to or remained in master mode.

• Hold the lower switch at the OVERALL RESET position and switch the CPU to RUN and back to STOP.

• Let the RESET switch return to the centre position.

• Observe the STOP LED flashing. This indicates that an OVERALL RESET has been requested.

• To continue, hold the lower switch at the OVERALL RESET position, switch the CPU to RUN and back to STOP Let the RESET switch return to the centre position.

• Observe the green RUN and red STOP LED's illuminate together for a short period and then both go out.

• The red STOP LED will be permanently illuminated after the OVERALL RESET routine has finished. It will then be necessary to perform a RESET as described above to return the AP to normal operation.


Overall reset and power down of the whole frame.

If problems are observed in getting both APs running after performing an overall reset followed by a reset proceed as described below. This can only be done during a full shut down of the power station

• Perform an overall reset.
• Power down the whole frame including the CPU948 155H.
• Take out the memory back up battery.
• Pull the CPU948 155H module.
• Wait a few seconds.
• Put back the CPU948 155H module.
• Put in the back up battery.
• Switch on the frame.
• Do another overall reset.
• Do a reset.
• After a few seconds the frame should go into running mode without any faults.