BENSHAW RSi GM2 Series, Instruction Manual

Page: 186 / 282

Learning Protection Features
176
GM2 Series VFD
890054-00-00
Torque Detection Protection Action
The inverter monitors and detects over and under torque conditions. This feature is activated when
either Relay1 and/or Relay2 (OU.31 and/or OU.33) are set to 43 (Torque Detect 1) and/or 44
(Torque Detect 2). The torque levels and time delays are set in parameters OU.68, 69 or OU.71, 72.
The inverter responds to the over/under torque condition based on the setting of OU.67 and
OU.70. Selections include providing a warning or a trip, at a specific speed or throughout the speed
range.
Group Code Name Setting
Setting
Range
Unit
OU
31, 33
Multi-function (digital)
relay1 item
Multi-function (digital)
relay2 item
43 Prt Trq Det 1
0 – 44 -
44 Prt Trq Det 2
67*
Torque detection 1
operation setting
0: None 0 – 8 -
68* Torque detection 1 level 100 0 – 200.0 %
69*
Torque detection 1 delay
time
0.1 0.0 – 10.0 sec
70**
Torque detection 2
operation setting
0: None 0 – 8 -
71** Torque detection 2 level 100 0 – 200.0 %
72**
Torque detection 2 delay
time
0.1 0.0 – 10.0 sec
*Visible only when the multi-function (digital) relay (OU.31, 33) is set to 43 (Prt Trq Det 1).
**Visible only when the multi-function (digital) relay (OU.31, 33) is set to 44 (Prt Trq Det 2).
The over and under torque detection action operates as shown in the figure by having a hysteresis
level of 10% compared to the motor's rated current. The over and under torque detection level set
as OU.68, OU.71 parameters are set as the ratio on motor's rated current.
Over Torque Detection Action
OUT-68 or OUT-71
OUT-69 or OUT-72
Motor
Current
MO
(42: Prt Trq Dect1
or 43: Prt Trq Dect2)
hysteresis(10%)
OUT-69 or OUT-72
hysteresis(10%)
Output Current of
Motor
Torque detection
level
Multi-function
output setting
Torque detection delay
time
Torque detection delay
time
43: Trq Dect1
44: Trq Dect2