Alarms And Troubleshooting; Alarms - Siemens SIERS 2.0 Instruction Manual

SECTION 3

3.0 Alarms and Troubleshooting

3.1 Alarms

The SIERS 2.0 electrical racking system includes
alarm functions to indicate unusual conditions.
The alarms will raise on the HMI display under the
conditions in Table 7 below:
Table 7: Alarm Modes and Descriptions
Alarm Mode
Motor Overcurrent
Motor Timeout
Open Permissive Switch
Removable Element or Auxiliary Tray
Position "Unknown"
Alarm Description
When the overcurrent is detected, the motor sends the alarm indication to the PLC (CPU) and the HMI
display will raise the over current text. This will stop the racking process. After a time of five seconds,
the Logic of the CPU restarts the racking process to move the removable element to the DISCONNECT
position. If this is unsuccessful, a second attempt to rack to the DISCONNECT position is initiated after
a time of five seconds. If the second attempt is also unsuccessful, the CPU Logic disables electrical
racking, and the user must use the manual racking crank to rack the removable element to the
DISCONNECT position.
If the motor over current is alarm is displayed, use the manual racking crank to manually rack the
removable element to the DISCONNECT position following the instructions in the GM-SG or GM-SG-AR
instruction manual. Verify that the removable element is in the DISCONNECT position. Unlatch and
open the compartment door. Remove the removable element from the compartment, following all
safety instructions and guidelines inspect the racking mechanism, e.g., alignment rails, and control
system in the compartment to determine the source of the problem. Once the issue is found and
corrected, reinsert the removable element, close and securely latch the compartment door, reset the
alarm (by touching the acknowledge alarm text) and try the racking process again.
If the racking process takes more time that the system allows, SIERS 2.0 stops the racking process, and
a time out alarm text is issued in the HMI display. Once the issue is found and corrected, reinsert the
removable element, close and securely latch the compartment door, reset the alarm (by touching the
acknowledge alarm text) and try the racking process again.
This error is caused by an open contact in one of the protection permissive switches. One permissive
switch is for insertion of the manual racking crank. The second permissive switch is for an open
compartment door. The third permissive switch is for sensing circuit breaker condition, which must
be open to allow racking. Check that all three permissive switches are in the correct positions, that
the circuit breaker is open, that the compartment door is closed, and the manual racking crank is not
inserted. Then try the racking process again.
If none of the indicating status on the HMI display are on, and there is control power available, it
means that the removable element is not in a defined position. The unknown position text will be
displayed.
Unlatch and open the compartment door, and remove removable element. Inspect the racking system,
alignment rails, and control system in the compartment to determine the source of the problem. Once
the issue is found and corrected, insert the removable element to the DISCONNECT position, and
close and securely latch the compartment door. Then, use the manual operation method to rack the
removable element to the desired position
SIERS 2.0 Siemens Integrated Electrical Racking System Instruction Manual
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