SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd. SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
Chapter 4 Explanation of Functions 4.2.98 Torque monitoring function The torque monitoring function allows you to monitor the estimated motor output torque when the V/F characteristic curve selection is the sensorless vector control, 0Hz-range sensorless vector control, or vector control with sensor. To monitor the output torque on the digital operator, select code "d012" on the digital operator. To monitor the output torque as a signal output from the control circuit terminal block, see Section 4.2.77, "FM terminal," or 4.2.78, "AM and AMI terminals." If the constant torque characteristic (VC), reduced-torque characteristic (1.7th power of VP), or free V/f characteristic is specified for the V/F characteristic curve selection (A044/A244), this function is disabled, and the display on the digital operator and the signal output from the control circuit terminal block are unpredictable. The torque monitored by this function is displayed as a ratio to the torque the motor outputs when rotating in synchronization with the frequency corresponding to the motor's rated output. (The latter torque is 100%.) Since this function estimates the output torque from the motor current, the accuracy of monitoring is about 20% when the inverter drives a motor that has the same output ratings as the inverter. Item Function code Data or range of data Description 03 Sensorless vector control V/F characteristic curve 04 0Hz-range sensorless vector control A044/A244 selection Vector control with sensor (not available 05 for A244) [FM] siginal selection [AM] siginal selection [AMI] siginal selection C027 C028 C029 Motor capacity selection H003/H203 0.20 to 75.0 (kW) Motor pole selection H004/H204 2, 4, 6, 8, or 10 (poles) (NOTE) :applied for 75 to 150kW 4.2.99 Forcing function (FOC) The forcing function allows you to apply an exciting current via an input terminal to the inverter to pre-build magnetic flux when "03" (sensorless vector control), "04" (0Hz-range sensorless vector control), or "05" (vector control with sensor) is specified for the V/F characteristic curve selection (A044/A244). Related code A044/A244: V/F characteristic curve selection, 1st/2nd motors C027: [FM] siginal selection C028: [AM] siginal selection C029: [AMI] siginal selection H003/H203: Motor capacity, 1st/2nd motor H004/H204: Motor poles setting, 1st/2nd motors 02 Output torque 11 Output torque (signed) (only for C028) Related code A044/A244: V/F characteristic curve selection, 1st/2nd motors C001 to C008: Terminal [1] to [8] functions To use this function, assign function "55" (FOC) to an intelligent input terminal. After the FOC function is assigned, the inverter will accept operation commands only when the FOC terminal is turned on. If the FOC terminal is turned off while the inverter is operating the motor, the inverter sets the motor into the free-running state. If the FOC terminal is turned on subsequently, the inverter restarts the motor according to the setting of the restart mode after FRS (b088). FOC FW(RV) Output frequency The inverter does not operate the motor because the FOC terminal is off. Free running Restarting according to the setting of "b088" Exciting current flows. 4 - 92
Chapter 4 Explanation of Functions 4.2.100 Torque limitation function The torque limitation function allows you to limit the motor output torque when "03" (sensorless vector control), "04" (0Hz-range sensorless vector control), or "05" (vector control with sensor) is specified for the V/F characteristic curve selection (A044/A244). Related code A044/A244: V/F characteristic curve selection, 1st/2nd motors b040: Torque limit selection b041 to b044: Torque limits (1) to (4) C001 to C008: Terminal [1] to [8] functions C021 to C025: Terminal [11] to [15] functions You can select one of the following four torque limitation modes with the torque limit selection (b040): 1) Quadrant-specific setting mode In this mode, individual torque limit values to be applied to four quadrants (i.e. forward powering, reverse regeneration, reverse powering, and forward regeneration) are set as the torque limits 1 to 4 (b041 to b044), respectively. 2) Terminal-switching mode In this mode, the torque limit values set in the torque limits 1 to 4 (b041 to b044) are switched from one another according to the combination of the states of torque limit switch terminals 1 and 2 (TRQ1 and TRQ2) assigned to intelligent input terminals. A single selected torque limit is valid in all operating states of the inverter. 3) Analog input mode In this mode, a torque limit value is set by a voltage applied to the control circuit terminal O2. The voltage range 0 to 10 V corresponds to the torque limit value range 0 to 200%. A single selected torque limit is valid in all operating states of the inverter. 4) Option (option 1/2) mode This mode is valid when the option board (SJ-DG) is used. For details on this mode, refer to the instruction manual for the option board. If function "40" (TL: whether to enable torque limitation) has been assigned to an intelligent input terminal, the torque limitation mode selected by the setting of "b040" is enabled only when the TL terminal is turned on. When the TL terminal is off, torque limit settings are invalid, and the maximum torque setting is applied as a torque limit. If the TL function has not been assigned to any intelligent input terminal, the torque limitation mode selected by the setting of "b040" is always enabled. Each torque limit value used for this function is expressed as a ratio of the maximum torque generated when the inverter outputs its maximum current on the assumption that the maximum torque is 200%. Note that each torque limit value does not represent an absolute value of torque. The actual output torque varies depending on the motor. If the torque limited (TRQ) signal function is assigned to an intelligent output terminal, the TRQ signal will turn on when the torque limitation function operates. Item Function code Data or range of data Description 03 Sensorless vector control V/F characteristic curve selection A044/A244 04 0Hz-range sensorless vector control 05 Vector control with sensor (not available for A244) 00 Quadrant-specific setting mode 01 Terminal-switching mode Torque limit selection b040 02 Analog input mode 03 Option 1 mode 04 Option 2 mode Torque limit (1) b041 0 to 200 (%) Forward powering (in quadrant-specific setting mode) Torque limit (2) b042 0 to 200 (%) Reverse regeneration (in quadrant-specific setting mode) Torque limit (3) b043 0 to 200 (%) Reverse powering (in quadrant-specific setting mode) Torque limit (4) b044 0 to 200 (%) Forward regeneration (in quadrant-specific setting mode) 40 Whether to enable torque limitation Terminal function C001 to C008 41 Torque limit switch 1 42 Torque limit switch 2 Terminal function C021 to C025 10 Torque limited signal (NOTE) :applied for 75 to 150kW 4 - 93
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Chapter 4 Explanation of Functions<br />
4.2.100 Torque limitation function<br />
The torque limitation function allows you to limit the motor<br />
output torque when "03" (sensorless vector control), "04"<br />
(0Hz-range sensorless vector control), or "05" (vector control<br />
with sensor) is specified for the V/F characteristic curve<br />
selection (A044/A244).<br />
Related code<br />
A044/A244: V/F characteristic curve selection,<br />
1st/2nd motors<br />
b040: Torque limit selection<br />
b041 to b044: Torque limits (1) to (4)<br />
C001 to C008: Terminal [1] to [8] functions<br />
C021 to C025: Terminal [11] to [15] functions<br />
You can select one of the following four torque limitation modes with the torque limit selection (b040):<br />
1) Quadrant-specific setting mode<br />
In this mode, individual torque limit values to be applied to four quadrants (i.e. forward powering,<br />
reverse regeneration, reverse powering, and forward regeneration) are set as the torque limits 1 to 4<br />
(b041 to b044), respectively.<br />
2) Terminal-switching mode<br />
In this mode, the torque limit values set in the torque limits 1 to 4 (b041 to b044) are switched from one<br />
another according to the combination of the states of torque limit switch terminals 1 and 2 (TRQ1 and<br />
TRQ2) assigned to intelligent input terminals. A single selected torque limit is valid in all operating<br />
states of the inverter.<br />
3) Analog input mode<br />
In this mode, a torque limit value is set by a voltage applied to the control circuit terminal O2. The<br />
voltage range 0 to 10 V corresponds to the torque limit value range 0 to 200%. A single selected torque<br />
limit is valid in all operating states of the inverter.<br />
4) Option (option 1/2) mode<br />
This mode is valid when the option board (SJ-DG) is used. For details on this mode, refer to the<br />
instruction manual for the option board.<br />
If function "40" (TL: whether to enable torque limitation) has been assigned to an intelligent input<br />
terminal, the torque limitation mode selected by the setting of "b040" is enabled only when the TL<br />
terminal is turned on. When the TL terminal is off, torque limit settings are invalid, and the maximum<br />
torque setting is applied as a torque limit. If the TL function has not been assigned to any intelligent<br />
input terminal, the torque limitation mode selected by the setting of "b040" is always enabled.<br />
Each torque limit value used for this function is expressed as a ratio of the maximum torque generated<br />
when the inverter outputs its maximum current on the assumption that the maximum torque is 200%.<br />
Note that each torque limit value does not represent an absolute value of torque. The actual output<br />
torque varies depending on the motor.<br />
If the torque limited (TRQ) signal function is assigned to an intelligent output terminal, the TRQ signal<br />
will turn on when the torque limitation function operates.<br />
Item Function code Data or range of data Description<br />
03 Sensorless vector control<br />
V/F characteristic curve selection A044/A244<br />
04 0Hz-range sensorless vector control<br />
05 Vector control with sensor (not<br />
available for A244)<br />
00 Quadrant-specific setting mode<br />
01 Terminal-switching mode<br />
Torque limit selection<br />
b040<br />
02 Analog input mode<br />
03 Option 1 mode<br />
04 Option 2 mode<br />
Torque limit (1)<br />
b041 0 to 200 (%) Forward powering (in<br />
quadrant-specific setting mode)<br />
Torque limit (2)<br />
b042 0 to 200 (%) Reverse regeneration (in<br />
quadrant-specific setting mode)<br />
Torque limit (3)<br />
b043 0 to 200 (%) Reverse powering (in<br />
quadrant-specific setting mode)<br />
Torque limit (4)<br />
b044 0 to 200 (%) Forward regeneration (in<br />
quadrant-specific setting mode)<br />
40 Whether to enable torque limitation<br />
Terminal function<br />
C001 to C008<br />
41 Torque limit switch 1<br />
42 Torque limit switch 2<br />
Terminal function C021 to C025 10 Torque limited signal<br />
(NOTE) :applied for 75 to 150kW<br />
4 - 93