Hitachi SJ700-2 Series - Tmon

Chapter 5 Instruction Words
5 - 41
Variable name Range of values Default Unit Data size Attribute
Tmon
Torque
monitoring
-300 to 300 - %
Unsigned
1-word data
Readable
- Explanation
This variable can be used to monitor output torque of the motor operated by the inverter. The data
monitored with this variable corresponds to the data monitored by the torque monitoring function (d012).
This variable is read-only.
- Sample program: Program to increase the inverter output frequency when motor output torque is low
(to automatically accelerate the motor)
(Code area [Code Window])
：
LOOP UL(00)= Tmon : Fetch the motor output torque data.
U(10)= abs UL(00) : Convert the data to an absolute value.
if U(10) <= U(04) then LBL1 : When torque is 50% or less, change the
output frequency to 100 Hz.
if U(10) <= U(03) then LBL2 : When torque is 60% or less, change the
output frequency to 80 Hz.
if U(10) <= U(02) then LBL3 : When torque is 70% or less, change the
output frequency to 70 Hz.
if U(10) <= U(01) then LBL4 : When torque is 80% or less, change the
output frequency to 65 Hz.
if U(10) <= U(00) then LBL5 : When torque is 100% or less, change the
output frequency to 60 Hz.
if U(10) > U(00) then LBL6 : When torque exceeds 100%, change the
output frequency to 60 Hz.
goto LBL7
LBL1 SET-Freq= 10000
goto LBL7
LBL2 SET-Freq= 8000
goto LBL7
LBL3 SET-Freq= 7000
goto LBL7
LBL4 SET-Freq= 6500
goto LBL7
LBL5 SET-Freq= 6000
goto LBL7
LBL6 SET-Freq= 6000
LBL7 goto LOOP
：
(Data area [Data Window])
U(00) = 100 : Set torque of 100% in variable "U (00)".
U(01) = 80 : Set torque of 80% in variable "U (01)".
U(02) = 70 : Set torque of 70% in variable "U (02)".
U(03) = 60 : Set torque of 60% in variable "U (03)".
U(04) = 50 : Set torque of 50% in variable "U (04)".
(Parameters)
A001 = 07
A004 = 100(Hz)