Mitsubishi Electric RD77MS2 User Manual page 177

Precautions during operation
The following details must be understood before inching operation is carried out.
• Acceleration/deceleration processing is not carried out during inching operation.
(Commands corresponding to the designated inching movement amount are output at operation cycle. When the movement
direction of inching operation is reversed and backlash compensation is carried out, the backlash compensation amount and
inching movement amount are output at the same operation cycle.)
The "[Cd.17] JOG speed" is ignored even if it is set. The error "Inching movement amount error" (error code: 1981H) will occur
in the following case.
([Cd.16] Inching movement amount)  (A) > ([Pr.31] JOG speed limit value)
However, (A) is as follows.
Unit setting
When the unit setting is pulse
When the unit setting is degree and the "[Pr.83] Speed control 10  multiplier setting
for degree axis" is valid
When the unit setting is other than the above
• Set a value other than a "0" in "[Cd.16] Inching movement amount".
If a "0" is set, the operation will become JOG operation. (Page 165 JOG Operation)
Operations when stroke limit error occurs
When the operation is stopped by hardware stroke limit error or software stroke limit error, the inching operation can be
performed in an opposite way (direction within normal limits) after an error reset. (An error will occur again if JOG start signal
is turned ON in a direction to outside the stroke limit.)
V
Inching operation possible
Upper/lower limit signal
Inching operation
Inching operation not possible
ON
OFF
Operation cycle
0.444 ms 0.888 ms 1.777 ms
2250 1125 562.5
135 67.5 33.75
1350 675 337.5
3.555 ms
281.25
16.875
168.75
5 MANUAL CONTROL
175
5.3 Inching Operation
5