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Chapter 14 Common Functions
14.8 Virtual servo amplifier function
This function is used to operate as virtual servo amplifier axis that generates only
command virtually by setting "4097, 4128" in servo parameter "[Pr.100] Servo series".
The synchronous control with virtually input command is possible by using the virtual
servo amplifier axis as servo input axis of synchronous control.
Also, it can be used as simulation operation for axes without servo amplifiers.
Setting value of "[Pr.97] SSCNET setting" Setting value of "[Pr.100] Servo series"
0: SSCNET 4097: Virtual servo amplifier (MR-J3)
1: SSCNET /H 4128: Virtual servo amplifier (MR-J4)
The details shown below explain about the "Virtual servo amplifier function".
[1] Control details
[2] Restrictions
[1] Control details
(1) When "4097, 4128" is set in "[Pr.100] Servo series" set in the flash ROM, it
operates as virtual servo amplifier immediately after power supply ON.
(2) When "0" is set in "[Pr.100] Servo series" set in the flash ROM, it operates
as virtual servo amplifier by setting "4097, 4128" in "[Pr.100] Servo series" of
buffer memory and by turning the PLC READY signal [Y0] OFF to ON after
power supply ON.
(3) Do not connect the actual servo amplifier to axis set as virtual servo
amplifier. If the servo amplifier is connected, the LED display status remains
"Ab." and the servo amplifier is not recognized. The following servo
amplifiers cannot be connected until the end station.
(4) The current feed value and machine feed value of virtual servo amplifier are
as follows.
(a) "0: Disabled (incremental system)" is set in "Absolute position detection
system (PA03)".
The both of current feed value and machine feed value are set to "0".
(b) "1: Enabled (absolute position detection system)" is set in "Absolute
position detection system (PA03)".
OP is established: Address at latest power supply OFF
OP is not established: "0" (Feed current value and machine feed value)
(5) When the virtual servo amplifier is set in the system setting of GX Works2,
"0: Disabled (incremental system)" is set in "Absolute position detection
system (PA03)".
Set "1: Enabled (absolute position detection system)" to the buffer memory
to use as absolute position system.