Specifications

Chapter 1 Outlines of the HA-655 driver
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Chapter 1 Outlines of HA-655 driver
The HA-655 series are dedicated servo drivers for FHA -C series actuators, which are axially compact
and feature a large through-hole. The actuators utilize Harmonic Drive® gear components for precise
motion control and super flat AC servomotors.
The HA-655 drivers provide many superior functions to allow the FHA-C actuators to excel in
performance.
1-1 Main features
◆ Easy parameter setting
Parameters have been set to match the driver with the FHA-C series actuator you have ordered. No
setting for the actuator is necessary by users.
The HA-655 series provides four modes that can be adjusted by end users: monitor mode, tune mode,
parameter mode, and test mode. Parameters of these modes are indicated on a front panel of the driver
using a 7-segment LED display and are easily set.
◆ Substantial monitoring functions
The monitor mode indicates various operational parameters and makes it possible to indicate the
required parameters for the servo system; such as commands, feedback, or an error counter.
Up to eight previous alarms are also indicated as alarm history that is helpful for diagnosis.
◆ Individual control power supply
It is possible to troubleshoot safely because the control power supply is individuated from the main.
◆ Easy test operation
The test mode helps testing a servo system by JOG operation with keys on the front panel.
Monitoring and operating I/O ports with the keys also help checking command sequences of a host
without actuator motions.
◆ Complex encoder cable
Improvement of data transmission with an encoder saves its wires resulted in increased reliability and
simplified wiring.
◆ Optional absolute encoder
The optional encoder system surely keeps its current position all the time, even in power failure.
◆ Electronic gear suitable for mechanical system
The electronic gear function adjusts commands to a feed pitch of a driven mechanism such as gears or
lead screws.
◆ Three types of input signals for position commands
Three types of input signals for the position command are selectable: two-pulse train (Forward Pulse,
Reverse Pulse), single-pulse train (Step and Direction), and two phase pulse train (Quadrature Input
Signals).