Lenze 4800 Manual page 247

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Troubleshooting and fault elimination
8.1.2
8-2
48XX/49XXSHB0399
RDY
In general, the RDY message will be reset if the machine cannot generate a torque
when running with the command "Controller enable" or if the mains supply for the
control electronics is switched-off (mains switch-off detection).
RDY is off when
( TRIP is displayed
( the communication with the automation module could not be established
after mains connection (only with C370 = -1-)
( the field current could not be built up after mains connection.
RDY will be reset for a short period of time when
( a new parameter set is loaded via terminal control
( a short-term mains fault (3-phases) occurs ( > 25ms).
I
max
I is on when
max
( the speed controller operates at its limit.
IMP
IMP is on when
( the switch Ctrl. enable is opened or another source of the controller inhibit is
active (check C183)
( a mains undervoltage or mains overvoltage is applied.
IMP is on sporadically when
( short-term mains faults occur (e.g. with weak mains)
During IMP, the ignition pulses in the armature circuit are inhibited.
The codes C065, C066 and C067 display the controller status in plain text.
Display via LECOM
The bits of the status word under C069 indicate the controller status (chapter 12.3).