Fuji Electric FRENIC MEGA G2 Series - Page 373

5.3 Description of Function Codes 5.3.2 E codes (Extension terminal functions)
5-189
FUNCTION CODES
Chap 5
FUNCTION
CODES
F Codes
E Codes
C Codes
P Codes
H Codes
A Codes
b Codes
r Codes
J Codes
d Codes
U Codes
y Codes
K Codes
E78, E79
E80, E81
Torque detection 1 (level and timer)
Torque detection 2/low torque detection (level and timer)
E78 specifies the operation level and E79 specifies the timer, for the output signal “TD1”. E80 specifies the operation
level and E81 specifies the timer, for the output signal “TD2” or “U-TL”.
In the inverter’s low frequency operation, as a substantial error in torque calculation occurs, no low torque can be
detected within the operation range at less than 20 % of the base frequency (F04). (In this case, the result of
recognition before entering this operation range is retained.) The U-TL signal goes off when the inverter is stopped.
Since the motor parameters are used in the calculation of torque, it is recommended that auto-tuning be applied by
function code P04 to achieve higher accuracy.
Output signal
Assigned data
Detection level
Timer
Range: 0 to 300%
Range: 0.01 to 600.00 s
“TD1”
46
E78
E79
“TD2”
47
E80
E81
“U-TL”
45
E80
E81
 Torque detected 1 – “TD1”, Torque detected 2 – “TD2”
The output signal TD1 or TD2 comes ON when the torque value calculated by the inverter or torque command
exceeds the level specified by E78 or E80 (Torque detection (Level)) for the period specified by E79 or E81 (Torque
detection (Timer)), respectively. The signal turns OFF when the calculated torque drops below “the level specified
by E78 or E80 minus 5 % of the motor rated torque.” (The minimum ON-duration is 100 ms.)
Fig. 5.3-27
 Low torque detected – “U-TL”
This output signal comes ON when the torque value calculated by the inverter or torque command drops below the
level specified by E80 (Low torque detection (Level)) for the period specified by E81 (Low torque detection (Timer)).
The signal turns OFF when the calculated torque exceeds “the level specified by E78 or E80 plus 5 % of the motor
rated torque.” (The minimum ON-duration is 100 ms.)
Fig. 5.3-28
E98, E99
Terminal [FWD] (Function selection), Terminal [REV] (Function selection) (Refer to
E01 to E09)
For details, refer to the descriptions of E01 to E09.
Calculated torque or
torque command value
Detection level
Detection level -5%
Timer
“TD1” , ”TD2”
Calculated torque or
torque command value
Detection level+5%
Detection level
“U-TL”
Timer