Hitachi Sj7002 Owners Manual

Phone: 800.894.0412   

Operations 
and Monitoring
In This Chapter....page
— Introduction.......................................................................................   2
— Optional Controlled Decel and Alarm at Power Loss........................   4
— Connecting to PLCs and Other Devices...........................................   7
— Using Intelligent Input Terminals.....................................................   13
— Using Intelligent Output Terminals..................................................   43...

Introduction
Operations
and Monitoring
4–2
Introduction
The previous material in Chapter 3 gave a refe rence listing of all the programmable functions 
of the inverter. We suggest that you first scan through the listing of inverter functions to gain a 
general familiarity. This chapter will buil d on that knowledge in the following ways:
1. Related functions – Some parameters interact with or depend on the settings in other 
functions. This chapte r lists “required settings” for a programmable function...

SJ7002 Inverter
Operations
and Monitoring
4–3
Warnings for 
Operating
ProceduresBefore continuing, please read  the following Warning messages.
WARNING: Be sure to turn ON the input power supply only after closing the front case. While 
the inverter is energized, be sure not to open  the front case. Otherwise, there is the danger of 
electric shock.
WARNING: Be sure not to operate electrical equipm ent with wet hands. Otherwise, there is 
the danger of electric shock.
WARNING: While the inverter is...

Optional Controlled Decel and Alarm at Power Loss
Operations
and Monitoring
4–4
Optional Controlled Decel and Alarm at Power Loss
With the default SJ7002 inverter configuration, a sudden po wer loss will cause the inverter to 
shut down immediately. If running at the time, the motor and load will coast to a stop. And 
without power, the inverter’s alarm output will  not activate. This default performance may be 
fine for applications with loads such as fans and pumps. However, some loads may require...

SJ7002 Inverter
Operations
and Monitoring
4–5
Follow the steps to implement the wiring change shown in the previous diagram.
1. Remove the 2-wire jumper J51 (terminals [R0] and [T0] to connector J51). 
2. Procure several inches of multi-strand 20 AWG (0.5mm
2) or slightly heavier wire.
3. Connect a wire to terminal [R0] that is lo ng enough to connect to terminal [P] (do not 
connect to [P] yet).
4. Connect a wire to terminal [T0] that is long enough to connect to terminal [N] (do not 
connect to [N]...

Optional Controlled Decel and Alarm at Power Loss
Operations
and Monitoring
4–6
The timing diagram below shows a power loss  scenario and the related parameter settings. 
During the controlled deceleration the inverter itself  acts as a load to decelerate the motor. With 
either a high-inertia load or a short deceleration  time (or both), it is possible that the inverter 
impedance will not be low enough  to continue linear deceleration and avoid an over-voltage 
condition on the DC bus. Use parameter...

SJ7002 Inverter
Operations
and Monitoring
4–7
Connecting to PLCs and Other Devices
Hitachi inverters (drives) are useful in many types of applications. During installation, the 
inverter keypad (or other programming device) will  facilitate the initial configuration. After 
installation, the inverter will  generally receive its control commands through the control logic 
terminals or serial interface from another contro lling device. In a simple application such as 
single-conveyor speed control,  a...

Connecting to PLCs and Other Devices
Operations
and Monitoring
4–8
Example Wiring 
DiagramThe schematic diagram below provides a gene ral example of logic connector wiring, in 
addition to basic power and motor  wiring covered in Chapter 2. The goal of this chapter is to 
help you determine the proper  connections for the various terminals shown below for your 
specific application needs.
U
V
W
Motor
R
S
T
Expansion Card #1
(optional)
Expansion Card #2
(optional)
T
R
R0
T0
Power source,  3-phase
P24
PLC...

SJ7002 Inverter
Operations
and Monitoring
4–9
Specifications of 
Control and Logic 
ConnectionsThe control logic connector board is removable for wiring convenience as shown below (first, 
remove two retaining screws). The small connecto r to the left is for serial communications.
Specifications for the logic connection terminals are in the following table:
Alarm relay
Logic
inputs
Analog 
inputs Analog 
outputs Logic
outputs
HO2
CM2
1353114
764215
AL1
AL0AL2
11
12
8FMAM
OOILSPSNRPSN
PowerSerial...