Tmon - Hitachi NT2021XA Instruction Manual

Chapter 2 Syntax
Variable name

Tmon

Torque monitoring
- 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])
Label Mnemonic
LOOP UL(00)=
U(10)=
if
if
if
if
if
if
goto
LBL1 SET-Freq=
goto
LBL2 SET-Freq=
goto
LBL3 SET-Freq=
goto
LBL4 SET-Freq=
goto
LBL5 SET-Freq=
goto
LBL6 SET-Freq=
LBL7 goto
(Data area [Data Window])
U (00) = 100
U (01) = 80
U (02) = 70
U (03) = 60
U (04) = 50
(Parameter)
A001 = 07
A004 = 100(Hz)
Range of values
-200 to 200
parameter1 parameter2 parameter3
Tmon
abs UL(00)
U(10) <= U(04)
U(10) <= U(03)
U(10) <= U(02)
U(10) <= U(01)
U(10) <= U(00)
U(10) > U(00)
LBL7
10000
LBL7
8000
LBL7
7000
LBL7
6500
LBL7
6000
LBL7
6000
LOOP
: Set torque of 100% in variable "U (00)".
: Set torque of 80% in variable "U (01)".
: Set torque of 70% in variable "U (02)".
: Set torque of 60% in variable "U (03)".
: Set torque of 50% in variable "U (04)".
Default Unit
- %
parameter4 parameter5
then LBL1
then LBL2
then LBL3
then LBL4
then LBL5
then LBL6
2-46
Data size Attribute
Unsigned
Readable
1-word data
: Fetch the motor output torque data.
: Convert the data to an absolute value.
: When torque is 50% or less, change the
output frequency to 100 Hz.
: When torque is 60% or less, change the
output frequency to 80 Hz.
: When torque is 70% or less, change the
output frequency to 70 Hz.
: When torque is 80% or less, change the
output frequency to 65 Hz.
: When torque is 100% or less, change the
output frequency to 60 Hz.
: When torque exceeds 100%, change the
output frequency to 60 Hz.