Specifications

Chapter 2 Functions
- 18 -
u Notice at power on
If power is turned on while the motor rotates at 2800r/min or more, the [Alarm 55] may occur. In spite of
the alarm, the multi-turn counter works normal.
u ABS (multi -turn) data clear signal (CN2-11: ABS-CLEAR)
The ABS (multi-turn) data clear signal should be inputted at:
(a) the initial power supply, and;
(b) wasting about 30 minutes or more for exchanging the built-in battery.
At either case, the multi-turn counter does not keep any data. To recover from the problem, move the
actuator to a proper origin and input the [ABS (multi-turn) data clear signal] at least four seconds to clear
the multi-turn counter to zero. However, the single-turn encoder keeps its resolvable position during
above-mentioned operation firmly.
During exchanging the battery, the built-in condenser helps the multi-turn counter to keep its count at
least about 30 minutes with charged energy in the condenser. Therefore, the operation of inputting [ABS
(multi-turn) data clear signal] is not required before discharging the energy.
Though the [alarm 50: encoder failure] may occur at power ON operation after exchanging the battery,
the encoder system is normal. To recover the problem, shut off the power once and turn it on again.
u Acquisition of absolute pulse trains generated by absolute encoder system
The HA-655 driver provides two selectable acquisition methods of absolute pulse trains generated by
the absolute encoder system; from I/O ports and from CN3 port (RS-232C).
(a) Acquisition from I/O ports (CN2-44, -45 and CN2-46, -47)
Acquiring an absolute pulse train
An absolute pulse train of an absolute encoder system is a combination of an absolute code (13 bits) of
the multi-turn counter expressing an encoder’s revolution number from its origin, and an absolute code
(13 bits) of the single-turn encoder expressing a resolvable position of the encoder (the motor).
Incremental signal trains following to the absolute pulse train of an absolute encoder system may be used
for monitoring signals of operating condition of the motor.
As a rule, acquiring an absolute pulse train is possible only one time during power ON procedure
illustrated below. If acquiring an absolute pulse train is required at another timing, use the CN3 port for
acquiring while the motor is stopping.
84µs
0ms(min.)
4s(max.)
3ms(max.)
0ms(min.)
10ms(max.)
Servo
-
ON
available
90ms(max.)
840µs
90ms(max.)
Note４
Multi-turn word
Single-turn word Note2
Incremental signal train
Note１
Note１
Control power OFF to ON
Main power OFF to ON
Ready OUT
Alarm OUT
Absolute data request IN
Phase-Z OUT
Phase-A, -B OUT
Servo-ON IN