Hitachi Sj7002 Owners Manual

							Using Intelligent Input Terminals
Operations
and Monitoring
4–30
The figure below shows the operation during  an overload restriction event. The overload 
restriction level is set by B022 and B025. The overl oad restriction constant is the time to decel-
erate to 0Hz from maximum frequency. When this fu nction operates, the acceleration time will 
be longer than the normal acceleration time. 
NOTE: The Overload Advance Notice function for intelligent outputs is related to Overload 
Restriction operatio n, discussed in “Overload Advance Notice Signal” on page 4–46.
Torque Limit   The Torque Limit function limits the motor output  torque for sensorless vector control, sensor-
less vector control 0Hz domain, or vector control with feedback. Three intelligent inputs 
control the Torque Limit function:
In the torque limit function, the following oper ational modes are available (selected by B040):
1. Four-quadrant individual setting mode – This  mode sets torque limit in 4 zones, forward 
driving and regenerating, revers e driving and regenerating. Limits for each quadrant are set 
with B041 – B044 individually.
2. Terminal selection mode –  By use of torque limit 
select intelligent input te rminals 1 and 2, this mode 
changes and uses torque limits 1 – 4 set in B041 – 
B044. Selected torque limit ra nge is valid in all four 
quadrants. Inputs TRQ1 a nd TRQ2 apply only to 
terminal selection mode.
3. Analog input mode – This mode sets torque limit value 
by the voltage applied to te rminal [O2] (referenced to 
[L] for ground. An input of 0 – 10V corresponds to the 
torque limit value of 0 to 200%. The selected torque 
limit value is valid in all four quadrants (whether 
forward or reverse move, driving or regenerating).
4. Expansion Cards 1 and 2 – This function is  valid when using the expansion card (SJ-DG). 
Please refer to the SJ-DG instruction manual.
Overload
restriction level
Maximum 
frequency
Output
frequency
Target frequency
Deceleration rate at overload restriction
Deceleration rate
at overload restriction
A004
F001
B022 / B025
B023 / B026
B022 / B025
t
Opt. Code and 
Symbol40=[TL]
41=[TRQ1]
42=[TRQ2]
Va l i d  f o r   Inputs[1] to [8]
Required
Settings B040, B041, 
B042, B043, 
B044
Default 
terminal Requires 
config.
SymbolFunction NameDescription
TL Torque limit enable Enables to rque limit function when ON
TRQ1 Torque limit select 1, Bit 1 (LSB) B inary encoded bit for quadrant select
TRQ2 Torque limit select 2, Bit 2 (MSB) B inary encoded bit for quadrant select
Intelligent 
InputsTorque limit parameter
TRQ2TRQ1
OFF OFF B041
OFF ON B042 ON OFF B043
ON ON B044

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							SJ7002 Inverter
Operations
and Monitoring
4–31
When the torque limit enable function [TL] is assigned to an intelligent input terminal, torque 
limiting occurs only when [TL] is ON. Both the  4-quadrant mode and terminal switching mode 
of torque limiting use input [TL] for enable/disab le. When the [TL] input is OFF, the inverter 
always uses the default torque control limit of  200% maximum. That torque limit value corre-
sponds to 200% of the maximum inverter output current. Therefore, the output torque also 
depends on the particular motor in use. When th e over-torque output [OTQ] is assigned in the 
intelligent output selection, it turns ON when th e inverter is performing torque limiting. When 
using the torque limit function at low spee d, also use the overload restriction feature.
Note 1: Unavailable for A344
Note 2: Unavailable for A244 and A344
The 4-quadrant operation mode for torque 
limiting (B040=00) is illustrated in the figure 
to the right. The instantaneous torque depends 
on inverter activity (acceleration, constant 
speed, or deceleration),  as well as the load. 
These factors determine  the operating quadrant 
at any particular time.  The parameters in B041, 
B042, B043 and B044 determine the amount of 
torque limiting that the inverter applies.
The terminal selectio n mode (B040=01) uses 
two intelligent inputs  [TRQ1] and [TRQ2] for 
the binary-encoded selection of one of the four 
torque limit parameters B041, B042, B043 and 
B044. 
CodeFunctionData or RangeDescription
A044 / A244 Control method 
selection 00
01
02
03
04
05V/f Constant torque
V/f Variable torque
V/f Free-setting torque *1
Sensorless vector *1
Sensorless vector, 0 Hz domain *1
Vector control with sensor *2
B040 Torque limitselection 00
01
02
03
044-quadrant indi
vidual setting
Terminal selection
Analog [O2] input
Expansion card 1
Expansion card 2
B041 Torque limit 1 0 to 200% Forward-driving in 4-quadrant mode
B042 Torque limit 2 0 to 200% Reverse-regenerating in 4-quadrant  mode
B043 Torque limit 3 0 to 200% Reverse-driving in 4-quadrant mode
B044 Torque limit 4 0 to 200% Forward-regenerating in 4-quadrant  mode
C001 to
C008 Intelligent input 
terminal [1] to [8] 
function 40
41
42Torque limit enable
Torque limit selection, bit 1 (LSB)
Torque limit selection, bit 2 (MSB)
C021 to
C025 Intelligent output 
terminal [11] to [15] 
function 10 In torque limit
Reverse-driving Forward-regenerating
Reverse-regenerating Forward-driving
Torque
FW
RV +
B40=00
B043B044
B042B041

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							Using Intelligent Input Terminals
Operations
and Monitoring
4–32
External Brake 
Control Function   The External Brake Control function enables the inverter to control external electromechanical 
brake systems with a particular safety characteristic. For example, elevator control systems 
maintain the brake on the load until the drive motor has reached a  releasing frequency (point at 
which the external mechanical brake is released).  This ensures that the load does not have an 
opportunity to begin coasting befo re the inverter begins driving the motor. The External Brake 
Control function can  be enabled by setting parameter B120=01.
The diagram below shows the signals that are important to the External Brake Control function.
 Brake confirmation [BOK] turns ON to indicate that an external brake system has released  (is not engaged). If external brake control is enabled (B120=01), then the [BOK] signal must 
work properly to avoid an inverter trip event.
 If [BOK] is not assigned to  an intelligent input, then setting B124 is ignored.
The steps below describe th e timing diagram of events on the following page.
1. When the Run command turns ON, the inverter be gins to operate and accelerate to releasing 
frequency (B125).
2. After the output frequency arrives at the set  releasing frequency (B125), the inverter waits 
for the brake release confirmation, set by B121. The inverter outputs the braking release 
signal [BRK]. However, if the output current of the inverter is less than the releasing current 
set by B126, the inverter does not turn ON the brake release output [BRK]. The lack of the 
proper current level indicates a fault (such as ope n wire to motor). In this case, the inverter 
trips and outputs the braking error signal [B ER]. This signal is useful to engage an 
emergency brake to ensure the load does not move, if the primary braking system has failed.
3. While the brake release output [BRK] is ON, the inverter drives the motor but does not 
accelerate immediately. The inverter waits for confirmation from the external brake. When 
the external brake system properly releases, it  signals the inverter by using the Brake OK 
input terminal [BOK]. If [BOK] is not assigned  to an intelligent input, B124 is ignored.
4. When the brake operates properly and signals  with the [BOK] input, the inverter waits for 
the required time for accelerati on (B122), and then begins to accelerate to the set target 
frequency. If [BOK] is not assigned to an in telligent input, acceleration begins after the 
delay time set by B122 af ter [BRK] signal occurs.
5. When the Run command turns OFF, the procedure outlined above happens in reverse. The 
idea is to engage the brake be fore the motor comes completely  to a stop. The inverter decel-
erates to the releasing frequency (B125) and turns the brake release output [BRK] OFF to 
engage the brake.
6. The inverter does not decelerate further duri ng just the waiting time for brake confirmation 
(B121). If the brake confirmation signal does not tu rn OFF within the waiting time for brake 
confirmation, the inverter causes a trip al arm and outputs the brake error signal [BER] 
(useful for engaging an emergency brake system).
7. Normally, the brake confirmation signal [BOK]  turns OFF, and the inverter waits the 
required waiting time. Then the inverter begins to decelerate again and brings motor and 
load to a complete stop (see timing diagram on next page).
Opt. Code44
Symbol[BOK]
Va l i d  f o r  
Inputs[1] to [8]
Required
Settings B120=01; 
Set B121 to  B127
Default 
terminal Requires 
config.
[BRK] Brake release
[BOK] Brake confirmation
Inverter
External Brake 
System
Emergency Brake
(or alarm, etc.)[BER] Brake error

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							SJ7002 Inverter
Operations
and Monitoring
4–33
The following table lists the parameters related to the External Brake Control function.
The diagram below shows the event sequence de scribed in the steps on the previous page.
CodeFunctionData or RangeDescription
B120 Brake control  enable 00=Disable
01=Enable Enables external brake control function within the 
inverter
B121 Brake waiting  time for release 0.00 to 5.00 sec. Sets the time 
delay after arrival at release 
frequency (B125) before the inverter outputs brake 
release signal [BRK]
B122 Brake wait time  for acceleration 0.00 to 5.00 sec. Sets time delay 
after brake confirmation signal 
[BOK] is received until the inverter begins to accel-
erate to the set frequency
B123 Brake wait time  for stopping 0.00 to 5.00 sec. Sets the time dela
y after brake confirmation signal 
[BOK] turns OFF (after [BRK] turns OFF) until 
decelerating the inverter to 0 Hz
B124 Brake wait time  for confirmation 0.00 to 5.00 sec. Sets the wait time for [BOK] signal after turn ON/
OFF of [BRK] signal. If [BOK] is not received 
during the specified time, the inverter will trip with 
an external brake error [BER].
B125 Break release  frequency setting 0.00 to 99.99 Hz /
100.0 to 400.0 Hz Sets the frequency at which the inverter outputs the 
brake release signal [BRK
] after delay set by B121
B126 Brake release  current setting 0% to 200% of 
rated current Sets the minimum inverter current level above 
which the brake release signal [BRK] will be 
permitted
B127 Braking  frequency 0 to 400 Hz 
(0 to 120 Hz for  model -4000) Sets the frequency at which the inverter outputs the 
braking signal
Output
frequency
Run command
Brake release output [BRK] Brake OK input [BOK]
B122B123
B121
B125B125
B124
Brake release frequency
Brake wait time to release
Brake wait time for accel Brake wait time for stopping
Brake wait time
for confirmation
B124Brake error output [BER] t
0

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							Using Intelligent Input Terminals
Operations
and Monitoring
4–34
Expansion Card 
Input Signals   Other inputs listed below require the expansion card SJ-FB Encoder Fe edback. Please see the 
SJ-FB manual for more information.
The diagram below shows how the Input/Output  connections for the SJ–FB feedback board. 
The inverter’s internal connections and paramete r configuration make these signals available on 
intelligent input and output terminals.
The information on outputs  related to the SJ-FB expansion card is in  “
Expansion Card Output 
Signals” on page 4–54.
ADD Frequency 
Enable   The inverter can add or subtract an offset value to the output frequency setting which is speci-
fied by A001 (will work with any of the five possible sources). The ADD Frequency is a value 
you can store in parameter A145. The ADD Frequenc y is summed with or subtracted from the 
output frequency setting only  when the [ADD] terminal is ON.  Function A146 selects whether 
to add or subtract. By configuring an intellig ent input as the [ADD] terminal, your application 
can selectively appl y the fixed value in A145 to offset (positively or negatively) the inverter 
output frequency in real time.
Opt. Code 
and 
Symbol
45=[ORT]
46=[LAC]
47=[PCLR]
48=[STAT]
Va l i d  f o r   Inputs[1] to [8]
RequiredSettings B120=01;
Set B121 to  B126
Wiring 
terminals ...on SJ-FB 
Expansion 
Card 
SymbolFunction NameDescription
ORT Orientation Orientation  (home search sequence)
LAC LAD  Cancel Cancels the linear a cceleration/deceleration position 
control in the feedback card
PCLR Position deviation clear Forces the position error to zero STAT Pulse train input enable Starts the  pulse train control of motor frequency
SJ7002 inverter
SJ-FB Feedback 
Expansion Card
Input assignments Output assignments
Input
terminals Output
terminals
Control and logic connector
ORT
LAC
PCLR
STAT ZS
DSE
POK
Opt. Code50
Symbol[ADD]
Va l i d  f o r  
Inputs[1] to [8]
RequiredSettings A145, A146
Default 
terminal Requires 
config.
Keypad potentiometer
Control terminal
Function F001 setting
Network variable F001
Calculate function output ADD direction select
Intelligent input [ADD]
Σ
A001 Frequency source setting
Output frequency setting
A145Add frequency
+/–
A146

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							SJ7002 Inverter
Operations
and Monitoring
4–35
Force Terminal 
Mode   The purpose of this intelligent input is to allow a device to force the inverter to allow control of 
the following two parameters via the control terminals:
 A001 - Frequency source setting (01  = control terminals [FW] and [RV])
 A002 - Run command source setting (0 1 = control terminals [O] or [OI])
Some applications will  require one or both settings above to use a source other than the 
terminals. You may prefer to normally use the inve rter’s keypad and potentiometer, or to use the 
ModBus network for control, for example. However, an external device can turn ON the 
[F-TM] input to force the inverter to (tempor arily) allow control (frequency source and Run 
command) via control terminals. When the [F-TM] input is OFF, then the inverter uses the 
regular sources specified by A001 and A002 again.
When changing the [F-TM] state during Run Mode  (inverter is driving the motor), the inverter 
will stop the motor before the new [F-TM] state takes effect.
Torque Control 
Enable   The torque control enable function is available in the  vector control with encoder feedback 
mode (A044 = 05). You can use the inverter not only in speed control or pulse train position 
control but also with the torque control function.  Suitable applications include material winding 
machines.
The torque command input is enabled when the  [ATR] intelligent input (assigned with option 
code 52) is ON. You can select  one of four torque command input methods (digital operator 
and three analog input terminals) by  the torque command input selection.
Opt. Code51
Symbol[F–TM]
Valid for 
Inputs[1] to [8]
Required
Settings A001, A002
Default 
terminal Requires 
config.
Opt. Code52
Symbol[ATR]
Valid for 
Inputs[1] to [8]
RequiredSettings A044 = 05, 
P033, P034, 
P035, P039, 
P040, P036,  P037, P038
Monitor 
Settings D009, D010, 
D012
Default 
terminal Requires 
config.
CodeFunctionData or RangeDescription
P033 Torque command input  selection 00 [O] terminal
01 [OI] terminal
02 [O2] terminal
03 Inverter keypad (P034)
P034 Torque command settin g 0. to 200. (%) Torque setting for the input from 
the digital operator (P033 = 03)
P035 Torque command polarity  select 00 Indicated by signal polarity at 
[O2] terminal 
01 Depends on motor direction
P039 Forward speed limit for  torque-control mode 0.00 to maximum 
frequency (Hz) —
P040 Reverse speed limit for  torque-control mode 0.00 to maximum 
frequency (Hz) —
P036 Torque bias mode 00 Disable 01 Inverter keypad (P037)
02 [O2] terminal input
P037 Torque bias value -200. to 200. (%)
P038 Torque bias polarity 00 Indicated by polarity
01 Depends on motor direction

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							Using Intelligent Input Terminals
Operations
and Monitoring
4–36
The following block diagram shows the torque control operation. If the measured speed 
exceeds the speed limit, the motor speed is  controlled in proportional control mode.
Clear Cumulative 
Power Value   When D015 cumulative power monitoring functi on is selected, the inverter displays the 
cumulative value of electric power input to the inverter. You can also convert the value to other 
engineering units by setting th e related parameter gain (B079  cumulative input power display 
gain setting). The gain can be set within  the range of 1 to 1000 (resolution = 1).
There are two ways to clear the cumulative power data:
 Set B078 = 01 and press the ST R key on the digital operator.
 Configure an intelligent input for the [KHC] function (option code = 53). Turn ON the input  to clear the cumulative power data.
When B079 cumulative input power display gain  setting = 1000, cumulative power data up to 
999000 kW/h can be displayed.
Torque command input
Intelligent input [ATR]Σ
Torque bias
Σ
++
+ +
Torque command 
(inverter output)
Σ
+
–
Speed limit
Measured speed
Speed 
comparator
Speed 
control
Opt. Code53
Symbol[KHC]
Va l i d  f o r  
Inputs[1] to [8]
RequiredSettings B078, B079
Monitor 
Settings D015
Default 
terminal Requires 
config.

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							SJ7002 Inverter
Operations
and Monitoring
4–37
Speed Servo ON  The servo-ON function allows you to set the inve rter in a speed-servo-lock state with an 
intelligent input during operation. This function is available when A044=05  vector control with 
sensor  for the characteristic V/f curve.
To use the servo-ON function, assign option code  54 to an intelligent input. After making the 
input assignment, the inverter will accept an  operation command only when the [SON] terminal 
is ON.
If the [SON] terminal is turned OFF during inve rter operation, the inverter output enters FRS 
mode (free-run stop). If the [SON] is turned ON ag ain, the inverter restarts the motor according 
to function B088, Restart Mode After FRS.
The inverter does not allow [SON] terminal a ssignment and [FOC] (forcing function) assign-
ment at the same time. If both are assigned, the  [FOC] has priority (operates normally) and the 
[SON] function is not available.
Current Forcing  The current forcing function applies an excitation current to pre-build magnetic flux in the 
motor. The forcing function is available when  one of the following vector control modes is 
configured for use at the inverter output:
 A044 = 03   sensorless vector control
 A044 = 04   0Hz-range sensorless vector control
 A044 = 05   vector control with sensor
To use current forcing, assign option code 55 to  an intelligent input terminal. After making the 
input assignment, the inverter will accept an  operation command only when the [FOC] terminal 
is ON.
If the [FOC] terminal is turned OFF during inve rter operation, the inverter output enters FRS 
mode (free-run stop). If the [FOC] is turned ON  again, the inverter restarts the motor according 
to function B088, Restart Mode After FRS.
Opt. Code54
Symbol[SON]
Valid for 
Inputs[1] to [8]
RequiredSettings A044
Default 
terminal Requires 
config.
Output
frequency
Servo-ON [SON] FW/RV
Free-run stop
t
0
Speed-servo lock states
Restart after FRS (B088)
Inverter does not follow FW/RV 
command because [SON] is OFF
Opt. Code55
Symbol[FOC]
Valid for 
Inputs[1] to [8]
RequiredSettings A044, A244
Default 
terminal Requires 
config.
Output
frequency
Current forcing [FOC] FW/RV
Free-run stop
t
0
Excitation current flows
Restart after FRS (B088)
Inverter does not follow FW/RV 
command because [FOC] is OFF

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							Using Intelligent Input Terminals
Operations
and Monitoring
4–38
General Purpose 
Inputs 1–8   Refer to the Easy Sequence Inst ruction Manual for information on  how to configure and use the 
general purpose inputs MI1 to MI8.
Analog Holding 
Command   The analog holding function causes the inve rter to sample and hold the analog command 
(external analog input). The hol d operation begins when the intelligent input [AHD] (assign 
option code 65) turns ON.  While [AHD] terminal is ON, th e Up/Down function uses the held 
input level as the reference speed (frequency)  value. Set parameter C101 (Up/Down memory 
Mode Selection) = 01 to store the last  frequency adjusted by UP/DWN in memory.
If the inverter power is cycled (OFF and ON) or  the [RS] reset terminal receives a reset (ON 
and OFF) while [AHD] is ON (holding analog valu e), the data held at the moment of power 
OFF or Reset ON will be used.
The wave form below shows a typical sequenc e for use of the Analog Holding Command.
NOTE: Frequent use of the Analog Hold function may damage the corresponding flash 
memory register in the inverter.
Opt. Code 
and 
Symbol
56=[MI1]
57=[MI2]
58=[MI3]
59=[MI4]
60=[MI5]
61=[MI6]
62=[MI7]
63=[MI8]
Va l i d  f o r  
Inputs[1] to [8]
RequiredSettings See Easy 
Sequence
Default 
terminal Requires 
config.
Opt. Code65
Symbol[AHD]
Va l i d  f o r  
Inputs[1] to [8]
RequiredSettings C101
Default 
terminal Requires 
config.Analog input command
 Analog Holding Command [AHD]
Analog hold ON
t
0
Output frequency command
0 1
0

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							SJ7002 Inverter
Operations
and Monitoring
4–39
Multi-stage 
Position Select
1, 2, and 3   Three Multi-stage Position Select inputs are bina ry-encoded to select one of eight settings, 
P060 to P067. Input [CP1] is the LSB; [CP3] is  the MSB. If no position select inputs are 
assigned, P060 becomes the  default position setting.
The three multi-stage position select inputs [C F1, [CF2], and [CF3] are binary-encoded. When 
more than one input changes state to select a  position, it is possible that skewing of input 
transitions would briefly select undesired intermediate posi tions. To avoid this problem, a 
determination time feature is av ailable. Parameter C169 sets a de lay time that applies uniformly 
to all three inputs. It operates  according to the following process:
 The determination timer is initialized upon an  input transition. The transition is not yet 
transferred to the output.
 The timer is initialized ag ain if an input transitions before the timer expires.
 When the timer expires, the state of all three posi tion select inputs is transferred to the output 
(to generate a new positi on selection, P060 to P067).
Note that excessively long determination time  settings will reduce the overall performance of 
the position select inputs.
Opt. Code 
and 
Symbol66=[CP1]
67=[CP2]
68=[CP3]
Valid for  Inputs[1] to [8]
RequiredSettings P060 to 
P067, C169
Default 
terminal Requires 
config.
Function 
CodeMulti-Position
Input Function
[CF3][CF2][CF1]
P060 Position setting 0 0 0 0
P061 Position setting 1 0 0 1
P062 Position setting 2 0 1 0
P063 Position setting 3 0 1 1
P064 Position setting 4 1 0 0
P065 Position setting 5 1 0 1
P066 Position setting 6 1 1 0
P067 Position setting 7 1 1 1
Po s i t i o n
selection
 [CP1]
t
0
Determination time = 0C169
Determination time > 0C169
 [CP2]
 [CP3]
7
1 3 7
54
0

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