Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 257

Precautions during control
■Absolute position system(ABS)/Incremental system (INC)
ABS/INC setting is set on the VC series/VPH series side.
Item
Incremental system (INC)
Absolute Operating system software
position system version "09" or later
(ABS)
Operating system software
version "08" or earlier
■Home position return
• Home position return operation types
The home position return methods that can be used in VC series/VPH series are shown below.
: Possible, : Not possible
Home position return method
Proximity dog method
Count method
Data set method
Dog cradle method
Stopper method
Limit switch combined method
Scale home position signal detection method
Dogless home position signal reference method
Driver home position return method
*1 Minor error (error code: 1979H) occurs, and home position return is not performed.
• Dogless home position signal reference method
When performing "dogless home position signal reference method" in VC series/VPH series, the home position, home
position return operation, and home position return data (home position return retry function, dwell time at the home
position return retry) is the following. Also, set the VC series/VPH series parameter "Select function for SSCNET on
communicate mode (P612) (Condition selection of home position set)" as follows.
Servo amplifier Linear encoder
type type
VC Linear Absolute position
series/ stage type
VPH
series
Incremental type
Direct Absolute position
drive type
motor
Incremental type
*1 Refer to the following for home position return operation.
MELSEC iQ-R Motion Controller Programming Manual (Positioning Control)
Precautions
No restrictions.
When control units are degree axis and the stroke limit is valid, a minor error (error code: 1A18H) occurs
when the following positioning controls are started.
• Instructions for pass point absolute specifications in continuous trajectory control (CPSTART instruction)
(linear interpolation, circular interpolation, helical interpolation)
• Position follow-up control (PFSTART instruction)
Proximity dog method 1
Proximity dog method 2
Count method 1
Count method 2
Count method 3
Data set method 1
Data set method 2
Data set method 3
Stopper method 1
Stopper method 2
Home position Home
position
return
operation
Position where address Operation C
of absolute linear
encoder becomes 0
Reference mark Operation A
Home position signal Operation A/
(zero point) Operation B
Operation A
Possible/Not possible






*1

*1


*1

*1




*1

Home position return data
Home Dwell time at
position the home
*1
return retry position
function return retry
Invalid
Valid
Valid/Invalid
Valid
5 FUNCTIONS USED WITH SSCNET COMMUNICATION
5.8 Compatible Devices with SSCNETIII(/H)
Parameter "Select function
for SSCNETIII on
communicate mode (P612)
(Condition selection of
home position set)"

0
0/1
0
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