Troubleshooting - OJ Electronics GreenZone Module MP-Bus Instruktionen

OJ GreenZone™ Module MP-Bus

TROUBLESHOOTING

Symptom
OJ GreenZone™
Module MP-Bus
inoperative – no light
in display
No communication
to OJ GreenZone™
Module MP-Bus
No communication
to OJ GreenZone™
Module MP-Bus
Display shows "9"
Display shows "99"
Cause
No power
Defective OJ GreenZone™
Module MP-Bus
Poor or no connection in
Modbus cable
Incorrect connection of
Modbus cable
Defective OJ GreenZone™
Module MP-Bus
OJ GreenZone™ Module
MP-Bus has not yet
received information on
section number from OJ
GreenZone™ Master
Poor or no connection in
Modbus cable
Defective OJ GreenZone™
Master
Defective OJ GreenZone™
Module MP-Bus
OJ GreenZone™ Module
MP-Bus has not yet
received information on
zone number from OJ
GreenZone™ Master
© 2017 OJ Electronics A/S
Action
Check that there is 24 VAC on entry terminals
1 and 2 and exit terminals 3 and 4.
If there is no voltage on exit terminals 3 and 4,
the components supplied from these terminals
(3 and 4) have either short-circuited or are
overloaded.
Replace OJ GreenZone™ Module MP-Bus.
Check Modbus cable.
Configuration of Modbus cable and connector
is shown in figs 6 and 7.
Repair or replace defective Modbus cable.
Check that the Modbus communication cable
is connected to the "Modbus in" connector
and looped to the next OJ GreenZone™
Module MP-Bus from the "Modbus out"
connector.
(See figs 4, 5 and 13.)
Replace OJ GreenZone™ Module MP-Bus.
Wait until OJ GreenZone™ Master
has allocated a section number to OJ
GreenZone™ Module MP-Bus.
Check Modbus cable.
Configuration of Modbus cable and connector
is shown in figs 6 and 7.
Repair or replace defective Modbus cable.
Replace OJ GreenZone™ Master.
Replace OJ GreenZone™ Module MP-Bus.
Wait until OJ GreenZone™ Master has
allocated a zone number to OJ GreenZone™
Module MP-Bus.
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