Setting Of Bias Speed; Setting Of Acceleration Time - Mitsubishi Electric Melsec-F FX3GC Series User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
4.2.6

Setting of Bias Speed

To control the stepping motor using each positioning instruction, set the bias speed considering the
resonance range of the stepping motor and the self-starting frequency.
Use the devices shown in the following table to determine the bias speed for each pulse output destination
device.
Pulse output
destination device
Y000
Y001
*1
Y002
*2
Y003
*1. Y002 is not available in FX
*2. Y003 is available only when two high-speed output special adapters are connected to the FX
4.2.7

Setting of Acceleration Time

Set the time required for acceleration from the bias speed to the maximum speed.
If the output pulse frequency is less than the maximum speed, the actual acceleration time will be shorter than
the set acceleration time.
If the variable speed pulse output (PLSV) instruction is used, the set acceleration time is only valid during
acceleration/deceleration (M8338 = ON)
Use the devices shown in the following table to determine the acceleration time for each pulse output
destination device.
Pulse output
destination device
Y000
Y001
*1
Y002
*2
Y003
*1. Y002 is not available in FX
*2. Y003 is available only when two high-speed output special adapters are connected to the FX
*3. Only available for FX
PLC User's Manual - Positioning Control Edition
Bias speed
Initial value
D8342
D8352
0Hz
D8362
D8372
PLC (14-point and 24-point type) and FX
3G
*3
.
Acceleration
Initial value
Time
D8348
D8358
100ms
D8368
D8378
PLC (14-point and 24-point type) and FX
3G
PLC Ver. 2.20 or later and FX
3UC
4.2 Setting of Various Items Regarding Speeds
Setting range
1/10 or less of maximum speed:
If the value is set to more than 1/10 of the maximum speed,
the bias speed will be automatically set to 1/10 of the
maximum speed.
3S
Setting range
50 to 5,000 ms:
If the value is set to 49 ms or less, the acceleration time will
be automatically set to 50 ms. If the value is set to 5,001 ms
or more, the acceleration time will be automatically set to
5,000 ms.
3S
/FX /FX /FX
3S 3G 3GC
4 Before Programming
/FX PLC.
3GC
PLC.
3U
/FX PLC.
3GC
PLC.
3U
PLC.
3U
B - 55
A
B
Apx.