Gets maintenance log (overhaul) data.
Element 5: Servo ON time [h] at reset
(integer)
* If a log number with which there is no
recorded data or nonexistent joint axis
number is specified, the output becomes as
follows:
Element 5: 0
* If the predictive/preventive maintenance
function is disabled, the output becomes as
follows:
Element 5: -1
* The meaning of data is the same as that of
the grease (LOGPMGRS).