Mitsubishi Electric MELSEC iQ-R Series User Manual page 171

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.)
"[Cd.17] JOG speed" is ignored even if it is set. The error "Inching movement amount error" (error code: 1A81H) 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 "[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 159 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.)
Upper/lower limit signal
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V
Inching operation
Inching operation possible
ON
OFF
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Operation cycle
0.25ms 0.50 ms
4000 2000
240 120
1200 1200
Inching operation not possible
1.00 ms 2.00 ms 4.00 ms
1000 500 250
60 30 15
600 300 150
5 MANUAL CONTROL
5.3 Inching Operation
5
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