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11 MII FAMILY FAQ (FREQUENTLY ASKED QUESTIONS)
11 MII FAMILY FAQ (FREQUENTLY ASKED QUESTIONS) 11.1MIFII FAQ
Q1 I have powered my MIFII unit to its rated voltage and the READY LED on the front remains turned off, although
the screen is lit up and showing measures.
A1 If the READY LED is unlit, it means that the unit will not trip in case of a fault. Three conditions must be present for the
unit to be in service:
1.No internal error must occur.
2.The STATUS setting in the Main Settings – General Settings group must be set to RDY (ready, in service).
3. At least one of the protection elements must be enabled.
All MIFII units are received from the factory with all protection elements disabled, in order to avoid undesired trips
during commissioning, before the user has set the pickup values for each protection element. For this reason, the READY
LED is off when a new unit is powered up
Make sure also that the enabled protection element belongs to the active settings group. If there is a protection
element enabled in settings group 1 but no protection element enabled in settings group 2 and the active group is group 2,
there will be no protection element active at the moment, and the READY LED will be off until either group 1 is active or any
group 2 protection function is enabled.
Q2 I have tried to change a setting via HMI, but when I press the enter button to store the setting, the HMI shows
the "ENTER PASSWORD" message. What I have to do?
A2 The settings configuration via HMI is secured by a password, so no unauthorized person can change any setting. The
relay password by default is 1, so when the relay asks to "ENTER PASSWORD", you have to select with the up arrow-
button the number 1 and then press the enter button.
Q3 What can I do if I forget the HMI password?
A3
Using the HMI it is possible to see an encrypted numerical value corresponding to the current HMI password. This
value can be viewed in the MAIN SETTINGS – PRODUCT SETUP – HMI Password menu. Please contact GE Multilin
Technical Support to decrypt this value and obtain the HMI password.
Q4 How can I change the HMI Password?
A4 In the MAIN SETTINGS – PRODUCT SETUP menu of the HMI, choose the HMI Password menu by pressing the enter
button. Enter the current password, and then choose a new password number between 1 and 9999 and press enter. The
new Password will be stored.
Q5
I have just received an MIFII unit, and I do not know which communication parameters I should set in the
program.
A5
The default communication baud rate is 9600 baud, for the EnerVista MII SETUP program as well as for the relay.
When starting the connection, the program will request the relay address and password; the value to be entered here is 1 in
both cases.
Q6 I have followed the previous steps, but I cannot communicate with the relay using the front port.
A6 Check the following points:
•Communications port in EnerVista MII SETUP (COM1, COM2, etc.)
•Baud rate must be the same for EnerVista MII SETUP and the relay.
•Relay address and password must be the same for EnerVista MII SETUP and the relay.
•The communications wire must be direct; do not use null modems, as this type of modem crosses pins 2 and 3.
GEK-106237P
MIFII Digital Feeder Relay
11.1 MIFII FAQ
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