Mitsubishi Electronics MR-E- A/AG - page 265

15 - 20
15. MR-E- AG SERVO AMPLIFIER COMPATIBLE WITH ANALOG INPUT
(c) Torque limit
1) Torque limit and torque
By setting parameter No. 28 (internal tor que l im i t 1), t o r q ue i s always limited to the maximum
value during operation. A relationship between the limit value and servo motor torque is shown
below.
00 100
Max. torque
torque
Torque limit value [%]
A relationship between the applied voltage of the analog torque limit (TLA) and the torque limit
value of the servo motor is shown below. Torque limit values will vary about 5% relative to the
voltage depending on products.
At the voltage of less than 0.05V, torque may vary as it may not be limited suf ficiently.
Therefore, use this function at the voltage of 0.05V or more.
2k 2k
Servo amplifier
Japan resistor
RRS10 or equivalent
TL
SG
P15R
TLA
LG
SD
100
0
010
5%
0.05
Torque limit value [%]
TLA application voltage vs.
torque limit value
TLA application voltage [V]
2) Torque limit value selection
Use parameters No. 43 through 48 to ena ble external torque limi t (TL) and interna l torque
limit. Torque limit values can be selected as shown in th e following table. However, if the
parameter No. 28 value is less than the limit val ue selected by TL/TL1, th e parameter No. 28
value is made valid.
(Note) External input signals
TL1 TL Torque limit value made valid
0 0 Internal torque limit value 1 (parameter No. 28)
01 TLA Parameter No. 28: Parameter No. 28
TLA Parameter No. 28: TLA
10 Parameter No. 76 Parameter No. 28: Parameter No. 28
Parameter No. 76 Parameter No. 28: Parameter No. 76
11 TLA Parameter No. 76: Parameter No. 76
TLA Parameter No. 76: TLA
Note.0: off
1: on