GE 745 Instruction Manual page 121

CHAPTER 5: SETPOINTS
5.3 S1 745 setup
5.3.1 Passcode
 PASSCODE
5.3.2 Preferences
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PREFERENCES
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PATH: SETPOINTS S1 745 SETUP
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MESSAGE
MESSAGE
MESSAGE
MESSAGE
After installing the setpoint access jumper, a passcode must be entered (if the passcode
security feature is enabled) before setpoints can be changed. When the 745 is shipped
from the factory, the passcode is defaulted to 0. When the passcode is 0, the passcode
security feature is disabled and only the setpoint access jumper is required for changing
setpoints from the front panel. Passcode entry is also required when programming
setpoints from any of the serial communication ports.
• SETPOINT ACCESS: This setpoint cannot be edited directly. It indicates if passcode
protection is enabled ("Read Only") or disabled ("Read & Write").
• RESTRICT SETPOINT WRITE ACCESS: This setpoint is only displayed when setpoint
write access is allowed and the current passcode is not "0". Select "Yes" and follow
directions to restrict write access. This message is replaced by
when write access is restricted.
WRITE ACCESS
• ALLOW SETPOINT WRITE ACCESS: This setpoint is displayed when setpoint write
access is restricted. New setpoints cannot be entered in this state. To gain write
access, select "Yes" and enter the previously programmed passcode. If the passcode
is correctly entered, new setpoint entry is allowed. If there is no keypress within 30
minutes, setpoint write access is automatically restricted. As an additional safety
measure, the
SELF-TEST ERROR: Access Denied
passcode is entered incorrectly three consecutive times.
• CHANGE PASSCODE: Select "Yes" and follow directions to change the current
passcode. Changing the passcode to the factory default of "0" disables the passcode
security feature.
• ENCRYPTED PASSCODE: If the programmed passcode is unknown, consult the factory
service department with the encrypted passcode. The passcode can be determined
using a deciphering program.
PATH: SETPOINTS S1 745 SETUP
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PASSCODE
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SETPOINT ACCESS:
Read & Write
RESTRICT SETPOINT
WRITE ACCESS? No
ALLOW SETPOINT
WRITE ACCESS? No
CHANGE PASSCODE?
No
ENCRYPTED PASSCODE:
AIKFBAIK
PREFERENCES
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FLASH MESSAGE TIME:
4.0 s
S1 745 SETUP
Range: 1 to 8 numeric digits
Range: No, Yes
Range: No, Yes
Range: No, Yes
Range: factory default passcode is "0"
ALLOW SETPOINT
message is generated when the
Range: 0.5 to 10.0 s in steps of 0.5
5–25