Chapter 1 Outlines of HA-675 driver
HA-675_V3_03
- 17 -
◆
Revolution count error (55) ABS
While the absolute encoder is not supplied power by power supply but the encoder circuit is active
only by the power of a built-in condenser and a built-in battery, the alarm occurs when the encoder
rotates too fast at the acceleration rate and/or speed exceeding the allowed zone shown the figure
below.
The alarm may be cleared by the same procedures as ABS system failure (53)
◆
Low battery voltage (56) ABS
For the absolute system, the alarm occurs when voltage of the built-in battery becomes lower than
2.8V. However, the actuator can be driven continuously, Exchange the battery having the voltage more
than 3.0V, and then the system recovers automatically from the alarm.
Even in the alarm condition, the HA-675 driver keeps the revolution counter data if the control power
supply is active. On the contrary if the power supply is inactive, the data may be lost due to further
voltage drop after around 30 minutes from the alarm. Exchange the battery to new one promptly.
◆
Send data rule error (57) ABS
The absolute encoder rotates with the speed beyond the allowed range shown in the figure above
during transmitting position data. To recover the alarm, shut off the control power once and turn it on
again.
◆
Error counter overflow (60)
The alarm occurs when an error count exceeds the set value in [parameter mode]
→
[6: position error
allowance] (See 6-6). It is possible to clear the alarm by inputting a signal to [CN2-2
clear: CLEAR].
The error count is cleared at the same time.
◆
Memory failure (RAM) (70)
The alarm occurs when the driver’s RAM memory fails. It is impossible to clear the alarm.
◆
Memory failure (EEPROM) (71)
The alarm occurs when the driver’s EEROM memory fails. It is impossible to clear the alarm.
◆
CPU failure (76 or flickering [0])
The alarm occurs when the driver’s CPU fails. It is impossible to clear the alarm.
No error zone
ABS MTD error zone
5000rad/s
2
16000rad/s
2
Motion time (ms)
Mot
o
r
s
p
e
e
d
(
1
/mi
n
)
Undetectable zone
of ABS MTD error
