Hitachi Sj7002 Owners Manual

							Using Intelligent Input Terminals
Operations
and Monitoring
4–40
Zero-Return 
Functions   A  zero-return  operation (also called a  home-return) occurs when the motor moves the load to a 
particular starting position. Us ing parameter P068, you may select one of three possible types 
of zero-return operations. Parameter P 069 selects the search direction. The zero pulse input 
(also called  zone input) signals the arrival at the zero position.
It is generally a requirement (or good practice)  to perform a zero-return operation after every 
powerup of the inverter. It is possible that the previous power OFF occurred when the load was 
not at zero position. Or, it may be that an ex ternal force moved the load during the power OFF 
period. If you do not perform a zero-return operation after power ON, then the inverter uses the 
current position at powerup as the zero position.
The three available zero-return modes differ  in the overall search speed, final approach 
direction to the origin, and the limit switch in put transition (or encoder pulse, if used) causing 
the final stop. Choose the zero-return m ode that best fits your application.
Low-speed Zero Return:
1. Motor accelerates for the specified 
acceleration time to the low zero-
return speed
2. Motor runs at the low zero-return 
speed
3. Inverter stops motor and sets position 
value to zero when [ORL] signal 
turns ON
High-speed 1 Zero Return:
1. Motor accelerates for specified 
acceleration time to high zero-return 
speed
2. Motor runs at high zero-return speed
3. Motor starts deceleration when 
[ORL] signal turns ON
4. Motor runs in reverse direction at 
low-speed zero-return speed
5. Inverter stops motor and sets 
position value to zero when [ORL] 
signal turns OFF
Opt. Code 
and 
Symbol69=[ORL]
70=[ORG]
Va l i d  f o r   Inputs[1] to [8]
Required
Settings P068, P069, 
P070, P071
Default 
terminal Requires 
config.
CodeFunctionDataDescription
P068 Zero-return mode selection 00 Low speed
01 High speed 1
02 High speed 2
P069 Zero return direction selection 00 Forward
01 Reverse
Zero-return limit [ORL]
Zero-return trigger [ORG]
Encoder Z pulses [Z]
InverterOutput to motor
Output 
frequency
 [ORG]
Po siti on
0 Low-speed zero-return level
P070
 [ORL]
Origin1 2
Output 
frequency
 [ORG]
Pos itio n
0 High zero-return level
P071
 [ORL]
Origin1 23
4
P070 Low-speed zero-
return level
5

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]  
						

							SJ7002 Inverter
Operations
and Monitoring
4–41
High-speed 2 Zero Return:
1. Motor accelerates for specified 
acceleration time to high zero-
return speed
2. Motor runs at high zero-return 
speed
3. Motor starts deceleration when 
[ORL] signal turns ON
4. Motor runs in reverse direction at 
low-speed zero-return speed
5. Motor starts deceleration to stop 
when [ORL] signal turns OFF
6. Motor accelerates in forward 
direction to low-speed zero return level
7. Inverter stops motor and sets  position value to zero when next [Z] signal pulse occurs
Forward/Reverse 
Drive Stop   The forward/reverse drive stop function prevents the motor from moving a load outside a 
desired position range. The end of travel in ea ch direction must cause the appropriate input 
signal, [FOT] or [ROT], to turn ON. Typically a  limit switch or proximity switch is used to 
generate these signals.
If the [FOT] turns ON during forward rotation (or [ROT] turns ON during reverse rotation), the 
inverter limits the motor torque to 10% in the current direction of travel.
Speed/Position 
Control Select   Turn ON the [SPD] terminal input to perform sp eed control while in absolute position control 
mode. The direction of rotation depends on  the operation command (FWD or REV). When 
switching from speed control to position control, be  sure to verify the sign of the value set in 
the operation command.
While the [SPD] terminal is OFF, the current  position count remains at zero. If the [SPD] 
terminal is turned OFF during motor operation, th e control mode switches to position control 
and pulse counting begins, starti ng from zero. If the target position value is also zero, the 
inverter stops the motor at the current positi on. Otherwise, rotation continues until motor 
rotation arrives at the target position.
Output 
frequency
 [ORG]
Posi tion
0 High zero-return level
P071
 [ORL]
Origin
1 2
3
4
P070 Low-speed zero-
return level
5
67
Opt. Code 
and 
Symbol71=[FOT]
72=[ROT]
Valid for  Inputs[1] to [8]
RequiredSettings none
Default 
terminal Requires 
config.
Forward drive stop [ORL]
Reverse drive stop [ORG]Inverter
Output to 
motor
Load FwdRev
Opt. Code73
Symbol[SPD]
Valid for 
Inputs[1] to [8]
RequiredSettings A044=05, 
P012
Default 
terminal Requires 
config.Output
frequency
Speed/position switching [SPD]
Position control
t
0
Speed control
Start of position counting
Target position
t

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]  
						

							Using Intelligent Input Terminals
Operations
and Monitoring
4–42
Pulse Counter 
Signals   The intelligent pulse counter input [PCNT] allows  you to input a pulse train up to 100 Hz via an 
intelligent input terminal. (For  high-speed applications, use the encoder input expansion card 
instead.) Monitor the cumulative count with D028, pulse counter function. The value of the 
cumulative count cannot be stored in a separate  register or parameter. The counter value is 
cleared to zero when inverter power is turn ON  or the inverter is reset. You may also use the 
[PCC] Pulse Counter Clear input to clear the cumulative count.
The frequency resolution of the input pulse ca n be calculated by the formula shown below 
(assuming a pulse signal input with 50% duty cycl e). Do not input higher frequencies than the 
calculated value.
Opt. Code 
and 
Symbol74=[PCNT]
75=[PCC]
Va l i d  f o r   Inputs[1] to [8]
Monitor
Settings D028
Default 
terminal Requires 
config.
Counter value
t
t
Pulse counter 
input [PCNT]
12
Filtered 
pulse train
34
Frequency resolution (Hz) = 250 / input terminal response setting (C160 to C168) + 1)
Example: When the input terminal response time = 1, the frequency resolution = 125 Hz

Phone: 800.894.0412   
						

							SJ7002 Inverter
Operations
and Monitoring
4–43
Using Intelligent Output Terminals
The intelligent output terminals are programmable in a similar way to the intelligent input 
terminals. The inverter has several output functions that you can assign individually to five 
physical logic outputs. Along with these solid-state outputs, the alarm  relay output has type 
Form C (normally open and normall y closed) contacts. The relay is assigned the alarm function 
by default, but you can assign it to any of th e functions that the open-collector outputs can use.
TIP: The open-collector transistor outputs can handle up to 50mA each. We highly recommend 
that you use an external power source as shown. It must be capable of providing at least 250mA 
to drive the outputs at full load.
If you need output current greater than 50mA, use the 
inverter output to drive a small relay. Be sure to use a 
diode across the coil of the relay as shown (reverse-
biased) in order to suppress the turn-off spike, or use a 
solid-state relay.
Output circuits
+–
24VDC
common
External  system SJ700
2 inverter
Sinking outputs (open collector)
1314151112
LLLLL
CM2
RY+
–
11CM2

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]  
						

							Using Intelligent Output Terminals
Operations
and Monitoring
4–44
Run Signal   When the [RUN] signal is selected as an 
intelligent output terminal, the inverter 
outputs a signal on that terminal when it is 
in Run Mode. The output logic is active 
low, and is the open collector type (switch 
to common).
The timing diagram to the right shows the 
Run Signal operation in  detail. The inverter 
outputs the [RUN] signal whenever the 
inverter output exceeds the start frequency 
specified by parameter B082 . The start 
frequency is the initial inverter output frequency when it turns ON.
 
NOTE: If you use an intelligent output to drive an ex ternal relay, be sure to connect a diode 
across the relay coil. This will prevent the negative-going turn-off spike generated by the coil 
from damaging the inverter’s output transistor.
Frequency Arrival 
Signals   The  Frequency Arrival  group of outputs help coordinate  external systems with the current 
velocity profile of the inverter. As the name implies, output [FA1] turns ON when the output 
frequency arrives  at the standard set frequency (parameter F001). Outputs [FA2] through [FA5] 
provide variations on this function for increased flexibility, relying on two programmable accel/ 
decel thresholds. For example, you can have an  output turn ON at one frequency during accel-
eration, and have it turn OFF at a different  frequency during deceleration. All transitions have 
hysteresis to avoid output chatter if the out put frequency is near one of the thresholds.
Note the following:
 For most applications you will  need to use only one or two of the frequency arrival type 
outputs (see example). However, it is possible  to assign all five output terminals to output 
functions [FA1] through [FA5].
 For each frequency arrival thre shold, the output anticipates the threshold (turns ON early) by 
an amount equal to 1% of the maximum frequency set for the inverter.
 The output turns OFF as the output frequency moves away from the threshold, delayed by an  amount equal to 2% of the max. frequency.
Opt. Code00
Symbol[RUN]
Va l i d  f o r  
Outputs[11 to [15],  [ALx]
Required
Settings (none)
Default 
terminal[12]
[FW, RV]
Motor 
speed
Run 
Signal
start freq.B82
ON
t
Opt. Code 
and 
Symbol
01=[FA1]
02=[FA2]
06=[FA3]
24=[FA4]
25=[FA5]
Va l i d  f o r  
Outputs[11 to [15],  [ALx]
Required
Settings F001 for FA1
C042 and C043 for 
FA 2  a n d  FA 3
C045 and C046 for 
FA 4  a n d  FA 5
Default 
terminal[11]=[FA1]
Other 
terminals Requires 
config.
SymbolFunction NameDescription
FA1 Frequency arrival type 1 –  constant speed ON when output to motor is at the standard set 
frequency F001
FA2 Frequency arrival type 2 –  over-frequency ON when output to motor is at or above the FA 
threshold 1 (C042) during accel
FA3 Frequency arrival type 3 –  at frequency ON when output to motor is at the FA threshold 1 
(C042) during accel, or
 at C043 during decel
FA4 Frequency arrival type 4 –  over-frequency (2) ON when output to motor is at or above the FA 
threshold 2 (C045) during accel
FA5 Frequency arrival type 5 –  at frequency (2) ON when output to motor is at the FA threshold 2 
(C045) during accel, or
 at C046 during decel

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]  
						

							SJ7002 Inverter
Operations
and Monitoring
4–45
Frequency arrival output [FA1] uses the 
standard output frequency (parameter F001) 
as the threshold for switching. In the figure 
to the right, the inverter accelerates to the 
set output frequency, wh ich serves as the 
threshold for [FA1]. Parameters F
on and Foff 
illustrate the hysteresis  that prevents output 
chatter near the threshold value.

on is 1% of the max. output frequency

off is 2% of the max. output frequency
The hysteresis effect causes the output to 
turn ON slightly  early as the speed 
approaches the threshold. Then the turn-
OFF point is slightly  delayed. The 1% and 
2% values also apply to the remaining 
Frequency arrival outputs, discussed below.
Frequency Arrival outputs [FA2] and 
[FA4] work the same way; they just use 
two separate threshold pairs as shown in 
the figure. These provide for separate 
acceleration and deceleration thresholds 
to provide more flexibility than for 
[FA1]. [FA2] uses C042 and C045 for 
ON and OFF thresholds, respectively. 
[FA4] uses C043 and C046 for ON and 
OFF thresholds, respectively. Having 
different accel and decel thresholds 
provides an asymmetrical output 
function. However, you can use equal 
ON and OFF thresholds, if desired.
Frequency Arrival outputs [FA3] and [FA5] use th e same threshold parameters as [FA2] and 
[FA4] above, but operate in a slightly different way. Refer to the diagram below. After the 
frequency arrives at the first threshold during  acceleration and turns ON [FA3] or [FA5], they 
turn OFF again as the output frequency accele rates further. The second thresholds work 
similarly during deceleration. In this way, we  have separate ON/OFF pulses for acceleration 
and deceleration.
FA 1
Output
frequency
F001
ON t
Hz
Threshold F
onFoff
0
FA 2 / FA 4
Output
frequency
C042/C045
C043/C046
ON t
Hz
Thresholds F
on
Foff
0
FA 3 / FA 5
Output
frequency
C042/C045
C043/C046
ON ONt
Hz
Thresholds
F
onFoffFon
Foff
0

Phone: 800.894.0412   
						

							Using Intelligent Output Terminals
Operations
and Monitoring
4–46
Overload 
Advance Notice 
Signal   When the output current exceeds a 
preset value, the [OL] or [OL2] 
terminal signal turns ON. Parameter 
C041 sets the overload threshold for 
[OL]; parameter C111 sets it for 
[OL2]. The overload detection circuit 
operates during powered motor opera-
tion and during regenerative braking. 
The output circuits  use open-collector 
transistors, and are active low.
Note the following:
 The default threshold value is 100%. To change the level from the default, set C041 or  C111(overload level).
 The accuracy of this function is the same as  the function of the output current monitor on the 
[FM] terminal (see  “
Analog Output Operation” on page 4–66).
NOTE: If you use an intelligent output to drive an ex ternal relay, be sure to connect a diode 
across the relay coil. This will prevent the negative-going turn-off spike generated by the coil 
from damaging the inverter’s output transistor.
Output Deviation 
for PID Control   The PID loop error is defined as the 
magnitude (absolute value) of the differ-
ence between the Setpoint (target value) 
and the Process Variable (actual value). 
When the error magnitude exceeds the 
preset value for C044, the [OD] terminal 
signal turns ON. The default deviation 
value is set to 3%. To change this value, 
change parameter C044 (deviation 
level). Refer to “
PID Loop Operation” 
on page 4–75.
NOTE: If you use an intelligent output to drive an ex ternal relay, be sure to connect a diode 
across the relay coil. This will prevent the negative-going turn-off spike generated by the coil 
from damaging the inverter’s output transistor.
Opt. Code 
and 
Symbol03=[OL]
26=[OL2]
Va l i d  f o r   Outputs[11 to [15],  [ALx]
Required
Settings C041, C111
Default 
terminal Requires 
config.
SymbolFunction NameDescription
OL Overload advance notice signal (1) ON when output current is more than the set  threshold for the overload signal (C041)
OL2 Overload advance notice signal (2) ON when output current is more than the set  threshold for the overload signal (C111)
Set 
value
[OL] 
Signal
C041
C041
ON ON
t
Current
threshold
power running
regeneration
threshold
Opt. Code04
Symbol[OD]
Va l i d  f o r   Outputs[11 to [15],  [ALx]
Required
Settings C044
Default 
terminal Requires 
config.
Set 
value
[OD] 
Signal
Error 
(SP-PV)
C044
C044
ON ON
t
Process variable
Setpoint

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]  
						

							SJ7002 Inverter
Operations
and Monitoring
4–47
Alarm Signal   The inverter Alarm Signal is active  when a fault 
has occurred and it is in the Trip Mode (refer to the 
diagram at right). When  the fault is cleared the 
Alarm Signal becomes inactive.
We must make a distinction between the Alarm 
Signal  AL and the alarm relay  contacts [AL0], 
[AL1] and [AL2]. The signal AL is a logic 
function, which you can assign to the open collec-
tor output terminals [11]  to [15], or the relay 
outputs. The most common (and default) use of 
the relay is for AL, thus the labeling of its termi-
nals. Use an open collector output (terminals [ 11] to [15]) for a low-current logic signal inter-
face or to energize a small relay (50 mA maximum). Use the relay output to interface to higher 
voltage and current devices (10 mA minimum). Note the following:
 When the alarm output is set to  normally closed, a time delay of less than 2 seconds occurs 
until the contact is closed when the power is turned ON.
 Terminals [11] – [15] are open collector outputs,  so the electrical specifications of [AL] are 
different from the contact output terminals [AL0], [AL1], [AL2].
 When the inverter power supply is turned OFF,  the alarm signal output is valid as long as the 
external control  circuit has power.
 This signal output has the delay time ( 300ms nominal) from the fault alarm output.
 The relay contact specifications are in  “
Specifications of Control and Logic Connections” on 
page 4–9. The contact diagrams for different conditions are on  the next page.
The alarm output terminals operate as shown belo w (left) by default. The contact logic can be 
inverted as shown (below right) by using the parameter setting C036. The relay contacts 
normally open (N.O.) and normally closed (N.O .) convention uses “normal” to mean the 
inverter has power and is in Run or Stop Mode . The relay contacts switch to the opposite 
position when it is in Trip M ode or when input power is OFF.
Opt. Code05
Symbol[AL]
Valid for 
Outputs[11 to [15],  [ALx]
Required
Settings C026, C036
Default 
terminals Relay [AL0], 
[AL1], [AL2]
Run Stop
Fault Tr i pFault
Alarm signal 
active
RUN
STOP
RESET
STOPRESET
Contact position after initializationContact position inverted by C036 setting
During normal running When an alarm occurs or  power is turned OFFDuring normal running or 
power is turned OFF When an alarm occurs
AL1
AL0AL2
AL1
AL0AL2
AL1
AL0AL2
AL1
AL0AL2
ContactPowerRun 
StateAL0- AL1AL0- AL2
N.C. 
(after 
initialize, 
C036=01) ON Normal Closed Open
ON Trip Open Closed
OFF – Open ClosedContactPowerRun 
StateAL0- AL1AL0-AL2
N.O.  (set 
C036=00) ON Normal Open Closed
ON Trip Closed Open
OFF – Open Closed

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]  
						

							Using Intelligent Output Terminals
Operations
and Monitoring
4–48
Over-torque 
Signal   The Over-torque function [OTQ] turns ON when th e estimated value of output torque of motor 
increases more than the arbitrary level set for the output (see table below). Recall that the 
torque limit function, covered in  “
Torque Limit” on page 4–30, actually limits the torque 
during certain operating conditions. Instead, the over-torque output feature only monitors the 
torque, turning ON output [OTQ] if the torque is  above programmable thresholds you set. The 
[OTQ] function is valid only for sensorless vect or control, 0-Hz domain sensorless vector 
control, or vector control with sensor. Do no t use the [OTQ] output except for these inverter 
operational modes.
The assignment of the Over-torque function to an  output terminal [OTQ] is detailed in the table 
at the left.
Instantaneous 
Power Failure / 
Under-voltage 
Signal   An instantaneous power failure (complete loss)  or under-voltage condition (partial loss) of 
inverter input voltage can  occur without warning. SJ700
2 Series inverters can be configured to 
respond to these condition s in different ways. You can select wh ether the inverter trips or retries 
(restart attempt) when an instantaneous power  failure or under-voltage condition occurs. You 
can select the retry func tion with parameter B001.
When enabled, the Retry Function  operates in the following ways:
Under-voltage conditions  – When an instantaneous power  failure or under-voltage condition 
occurs, the inverter will attempt to restart up to 16 times. A trip condition will occur on the 17th 
attempt, which must be cleared with the St op/Reset key. When connecting control power 
supply terminals [Ro]–[To] to the DC bus [P]–[N ], an under-voltage may be detected at power-
off and cause a trip. If this is undesirable, set B004 to 00 or 02.
Over-current/voltage conditions  – When retry function is selected and an over-current or an 
over-voltage condition occurs, a restart is attempte d 3 times. A trip will occur on the 4th failed 
restart attempt. Use parameter B004 to select the trip and alarm response to instantaneous 
power failure and under-voltage conditions. 
If an over-voltage or over-current trip occurs  during the deceleration and an instantaneous 
power failure error (E16) is displayed the inverter  goes into free-run stop. In this case make the 
deceleration time longer.
Opt. Code07
Symbol[OTQ]
Va l i d  f o r  
Outputs[11 to [15],  [ALx]
Required
Settings C055, C056, 
C057, C058
A044 = 03 or  04 or 05
Default 
terminals[14]
CodeFunction/DescriptionData or Range
C055 Over-torque, forward-driving level setting 0 to 200%
C056 Over-torque, reverse-regenerating, level setting 0 to 200%
C057 Over-torque, reverse-driving, level setting 0 to 200%
C058 Over-torque, forward-regenerating, level setting 0 to 200%
C021 to C025 Intelligent output terminal [11] to [15] function 07
Opt. Code 
and 
Symbol08=[IP]
09=[UV]
Va l i d  f o r   Outputs[11 to [15],  [ALx]
Required
Settings B001, B002, 
B003, B004, 
B005, B007
Default 
terminals Requires 
config.
SymbolFunction NameDescription
IP Instantaneous Power Failure ON when the inverter detects a loss of input  power
UV Under-voltage conditio nON when the inverter input power is less 
than the specified input range

Phone: 800.894.0412   
						

							SJ7002 Inverter
Operations
and Monitoring
4–49
Use the parameters listed in the table belo w to define Instantaneous Power Failure and 
Under-voltage Signal operation.
In the following examples, t
0= instantaneous power failure time, t1 = allowable under-voltage / 
power failure time (B002), and t
2= retry wait time (B003).
CodeFunctionData or RangeDescription
B001 Selection of  automatic restart 
mode 00 Alarm output after trip, automatic 
restart disabled
01 Restart at 0 Hz
02 Retry with frequency matching to  present motor speed
03 Retry with frequency matching  followed by deceleration to stop— then 
trip alarm
B002 Allowable under- voltage power 
failure time 0.3 to 1.0 sec. The amount of time a power input 
under-voltage can occur without 
tripping the power failure alarm. If 
under-voltage exists longer than this 
time, the inverter trips, even if the restart 
mode is selected. If it exists less than 
this time retry will be attempted. 
B003 Retry wait time  before motor 
restart 0.3 to 100 sec. Time delay af
ter a trip condition goes 
away before the inverter restarts the 
motor
B004 Instantaneous  power failure / 
voltage trip alarm 
enable 00 Disable
01 Enable
02 Disable during stop and ramp to stop 
B005 Number of restarts  on power failure / 
under-voltage trip 
events 00 Restart up to 16 times on instantaneous 
power failure or under-voltage
01 Always restart on instantaneous power  failure or an under-voltage condition
B007 Restart frequency  threshold 0.00 to 400.0 Hz;
model -4000HFx2 
is 0.00 to 120.0 Hz When frequency of the motor is less 
than this value, the inverter will restart 
at 0 Hz
Power supply
Inverter output
Motor
frequency
After waiting for t2 seconds when t0 < t1; restart
Example 1: Power failure within allowed limits; resu me Example 2: Power failure longer than limits; trip
t0
t1
t2
Power supply
Inverter output
Motor
frequency
t0
t1
Inverter trips when t0 > t1
Free-runFree-run
tt

Phone: 800.894.0412