Setting Of "Servo Ready" Signal (Melservo Mr-C Series - Mitsubishi FX3G Series User Manual

FX /FX /FX PLC User's Manual - Positioning Control Edition
3G 3U 3UC
Built-in Positioning Functions
Setting example 2:
To set the transfer distance per pulse to 0.01° (if a turntable is used):
Machine specifications
Servo amplifier
Rated rotational speed of servo motor
Turntable
Reduction ratio (mechanical gear) (n)
(Timing belt)
Resolution of servo motor (Pt)
CMX
×
=
0
CDV
Set the electronic gear as follows:
CMX = 32768, CDV = 1125
In this case, when the main unit outputs the maximum output
pulse frequency (100 kHz), the servo motor rotational speed will
be as follows:
CMX
×
N =
0
CDV
32768
×
=
1125
. .
1333.33 r/min < 3000r/min (Rated rotational speed)
It is not necessary to restrict the maximum speed on the PLC side because the servo motor rotational speed
is less than the rated rotational speed.
4.6.3

Setting of "Servo Ready" Signal (MELSERVO MR-C Series)

If the following parameter is set as shown in the following table for the MELSERVO MR-C Series, pin 3 of the
CN1 connector of the servo amplifier will be changed to "servo ready" (RD). Note that the following parameter
should be set for the example programs shown in Chapter 12.
Series Parameter No. Setting value
MR-C
MR-J2S Series
3000r/min
360°/REV
8/64
131072PLS/REV
Pt 131072
×
-2
= 1×10
n×360 8/64×360
60
× f
0
Pt
60
× 100000
131072
21 020
4.6 Setting of Various Items on Servo Amplifier (Drive Unit) Side
Servo motor
Pt = 131072 (PLS/REV)
Timing belt: 8/64
f0 : Command pulse frequency [Hz]
32768
(open collector system)
=
1125 CMX : Electronic gear
(numerator of command pulse
multiplying factor)
CDV : Electronic gear
(denominator of command pulse
multiplying factor)
N0 : Servo motor rotational speed [r/min]
0 : Transfer distance per pulse [° ]
4 Before Programming
A
B
Turntable
Apx.
B - 67