5 FUNCTIONS USED WITH SSCNET COMMUNICATION
5.8 Compatible Devices with SSCNETIII(/H)
255
5
Precautions during control
■Absolute position system(ABS)/Incremental system (INC)
ABS/INC setting is set on the VC series/VPH series side.
■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
*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.
*1 Refer to the following for home position return operation.
MELSEC iQ-R Motion Controller Programming Manual (Positioning Control)
Item Precautions
Incremental system (INC) No restrictions.
Absolute
position system
(ABS)
Operating system software
version "09" or later
Operating system software
version "08" or earlier
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)
Home position return method Possible/Not possible
Proximity dog method Proximity dog method 1
Proximity dog method 2
Count method Count method 1
Count method 2
Count method 3
Data set method Data set method 1
Data set method 2
*1
Data set method 3
*1
Dog cradle method
Stopper method Stopper method 1
*1
Stopper method 2
*1
Limit switch combined method
Scale home position signal detection method
Dogless home position signal reference method
Driver home position return method
*1
Servo amplifier
type
Linear encoder
type
Home position Home
position
return
operation
*1
Home position return data Parameter "Select function
for SSCNETIII on
communicate mode (P612)
(Condition selection of
home position set)"
Home
position
return retry
function
Dwell time at
the home
position
return retry
VC
series/
VPH
series
Linear
stage
Absolute position
type
Position where address
of absolute linear
encoder becomes 0
Operation C Invalid
Incremental type Reference mark Operation A Valid 0
Direct
drive
motor
Absolute position
type
Home position signal
(zero point)
Operation A/
Operation B
Valid/Invalid 0/1
Incremental type Operation A Valid 0
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