How to troubleshoot the screen backlight flashing on Micrologic P or H trip unit
Issue:
Screen backlight flashing on Micrologic P or H trip unit
Product Line:
Powerpact P, R and Masterpact NT, NW
Resolution:
If you are using a 2 wire system and have jumper wires to the other two terminals, 4-wire mode in the trip unit must be used when using the jumper method so that E3-E6 are all set to the Modbus protocol. When 2w+ULP is selected only E3 and E4 are set to the Modbus protocol while E5 and E6 are set to the ULP protocol. Therefore, that when incorrect data is input into the ULP terminals the display will flash. Set the trip unit back to 4-wire mode to fix the issue, or by removing the jumpered connection to E5 and E6 and leaving it set to 2w+ULP mode.
See attached for correct trip unit set up for various wiring schemes.
Screen backlight flashing on Micrologic P or H trip unit
Product Line:
Powerpact P, R and Masterpact NT, NW
Resolution:
If you are using a 2 wire system and have jumper wires to the other two terminals, 4-wire mode in the trip unit must be used when using the jumper method so that E3-E6 are all set to the Modbus protocol. When 2w+ULP is selected only E3 and E4 are set to the Modbus protocol while E5 and E6 are set to the ULP protocol. Therefore, that when incorrect data is input into the ULP terminals the display will flash. Set the trip unit back to 4-wire mode to fix the issue, or by removing the jumpered connection to E5 and E6 and leaving it set to 2w+ULP mode.
See attached for correct trip unit set up for various wiring schemes.
Publié pour: Schneider Electric Belgium
Besoin d'aide ?
Sélectionnez le bon produit
Trouvez rapidement et facilement les produits et accessoires adaptés à vos applications.
Obtenir un devis
Effectuez une demande de renseignements en ligne et un expert vous contactera.
Où acheter ?
Trouvez facilement le distributeur Schneider Electric local le plus proche.
Centre d'aide
Trouvez des ressources de support pour tous vos besoins, en un seul endroit.