Mitsubishi Electric MELSEC-LD77MS2 User Manual page 747

[LD77MS4 operation example]
Each operation
PLC READY signal [Y0]
All axis servo ON [Y1]
Positioning start
signal [Y10]
Torque limit setting
Pr.17
value
Torque output setting
Cd.101
value
Torque change function
Cd.112
switching request
New torque value/ forward
Cd.22
new torque value
Torque limit stored value/
Md.35
forward torque limit
stored value
1: The torque limit setting value or torque output setting value becomes effective at the PLC READY signal [Y0] rising edge
(however, after the servo is turned ON.)
If the torque output setting value is "0" or larger than the torque limit setting value, the torque limit setting value will be its value.
2: The torque limit setting value or torque output setting value becomes effective at the positioning start signal [Y10] rising edge,
and the torque limit value is updated.
If the torque output setting value is "0" or larger than the torque limit setting value, the torque limit setting value will be its value.
3: The torque change value is cleared to "0" at the positioning start signal [Y10] rising edge.
4: The torque limit value is changed by the torque changed value.
5: When the new torque value is 0, a torque change is considered not to be carried out.
6: When the change value is exceeds the torque limit value, a torque change is considered not to be carried out.
Fig. 13.29 Torque change operation (forward/reverse torque limit value same setting) (Axis 1)
[1] Control details
The torque value (forward new torque value/new reverse torque value) of the
axis control data can be changed at all times. The torque can be limited with a
new torque value from the time the new torque value has been written to the
Simple Motion module.
Note that the delay time until a torque control is executed is max. operation cycle
after torque change value was written.
The toque limiting is not carried out from the time the power supply is turned ON
to the time the PLC READY signal [Y0] is turned ON.
The new torque value (
(OFF to ON) of the positioning start signal [Y10].
The torque setting range is from 0 to "
(When the setting value is 0, a torque change is considered not to be carried out,
and it becomes to the value set in "
Torque output setting value
".)
setting value
The following drawing shows the operation at the same setting (Figure 13.29)
and the operation at the individual setting (Figure 13.30) for the forward new
torque value and new reverse torque value.
1
300
2
0
0
3
0
0 300 300
(Note): Refer to Section 3.3 for input/output signal and Chapter 5 for buffer memory address of LD77MS16.
, ) is cleared to zero at the leading edge
Cd.22 Cd.113
Pr.17
Torque limit setting value
Pr.17
". The torque change range is 1 to "
2
100
4
4
4 3
5 6
200 0 350 0
200 100
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Chapter 13 Control Sub Functions
Torque limit setting value
" or "
Pr.17
250
150
4
4
75 230
75 230
".
Cd.101
Torque limit
1
2
3
0
150