Connecting The Inverter To Modbus - Hitachi L2002 Instruction Manual

DIP Switch Introduction
The inverter has three (3) internal DIP switches, located to the right of the logic connec-
tors as shown below. This section provides an introduction, and refers you to other
chapters that discuss each DIP switch in depth.
The SR/SK (Source/Sink) DIP switch configures the inverter's intelligent
SR
inputs for sinking or sourcing type circuit. Note that the installation and
Powerup Test steps in this chapter do not require wiring the input terminals.
SK
The SR/SK switch configuration is covered in detail in
Input Terminals" on page
The 485/OPE (RS-485/Operator) DIP switch configures the inverter's RS-
485
485 serial port. You can use the inverter's keypad (OPE-SRmini) either on
the inverter, or connected via a cable to the serial port. For the keypad, either
position of the 485/OPE DIP switch will work. However, communication
with "smart" operator devices requires the proper setting. Using digital
OPE
operators (such as OPE–SR or OPE–0EX requires the "OPE" setting.
Inverter control via a ModBus network communication requires the "485"
setting. See
details.
The TM/PRG (Terminal/Program) DIP switch affects the inverter's setting
TM
for control sources. Parameter A001 sets the source selection for the
inverter's output frequency (motor speed). Parameter A002 selects the Run
command source (for FW and RV). These independently select among
sources such as input terminals, inverter keypad keys and potentiometer,
PRG
internal register settings, ModBus network, etc.
When the TM/PRG switch is set to PRG, parameter settings A001 and A002
are in effect. However, when the switch is in the TM (terminal) position, the
inverter uses the analog input terminals for the motor speed setting, and uses
the [FW] and/or [REV] terminals for the Run command. More information
is in
NOTE: L200
2
ing to other networks such as DeviceNet, Ethernet, CANopen, and ProfiBus is possible
by adding optional, external interface devices. Contact your Hitachi distributor for more
information.
4–9.
"Connecting the Inverter to ModBus" on page B–3
"Control Source Settings" on page
inverters have built-in ModBus RTU RS-485 communications. Connect-
L200 Inverter
2
SR 485
SK
OPE
"Using Intelligent
3–10.
2–5
TM
PRG
for more