GEK-113188A
MIGII Digital Protection for Electrical Machines
11-1
11 MII FAMILY FAQ (FREQUENTLY ASKED QUESTIONS)
11.1 MIGII FAQ
11
11 MII FAMILY FAQ (FREQUENTLY ASKED QUESTIONS) 11.1MIGII FAQ
Q1
I have powered my MIGII 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 MIGII 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
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 MIGII 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.
Summary of Contents for Multilin MIGII
Page 2: ......
