Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual page 198

Operation precautions
• The inching operation does not perform acceleration/deceleration processing. (Pulses for the specified inching movement
amount are output at 1.77 ms. The direction of the inching operation is reversed. When the backlash compensation is
performed, pulses for the backlash are output at 1.77 ms and pulses for the specified inching movement amount are output
at the next 1.77 ms.) [Cd.17] JOG speed is ignored even if it is set. However, Inching movement amount error (Error code:
1981H) occurs in the following cases.
Unit
pulse
Other than pulse
• Set a value other than 0 for [Cd.16] Inching movement amount. When 0 is set, the JOG operation is performed. (Page
187 JOG Operation)
Operation when a stroke limit error occurs
When the operation is stopped due to a hardware stroke limit error or software stroke limit error during the operation, the
inching operation can be operated in the opposite direction (direction toward the normal range) after the error is reset. (If JOG
start signal is turned on in the direction toward outside the limit range, the error occurs again.)
V
Inching operation possible
Upper/lower limit signal
Operation timing and the processing time
The following shows the details on the operation timing and processing time in the inching operation.
[Cd.181] Forward JOG
start signal
[Cd.182] Reverse JOG
start signal
[Md.141] BUSY signal
[Md.26] Axis operation status
External pulse output
(PULSE)
Positioning operation
Positioning complete signal
([Md.31] Status: b15)
Normal timing time
t1
1.0 to 3.0 ms
11 MANUAL CONTROL
196
11.3 Inching Operation
Error condition
([Cd.16] Inching movement amount) × 562.5 > ([Pr.31] JOG speed limit value)
([Cd.16] Inching movement amount) × 337.5 > ([Pr.31] JOG speed limit value)
Inching operation
Inching operation not possible
ON
OFF
ON
OFF
OFF
ON
OFF
t1
Standby
JOG operation
t2
OFF
t2
1.3 to 2.2 ms
t3
Standby
ON
t4
t3
1.3 to 2.2 ms
t4
Depends on the parameter