4. Operation
4.5 Absolute Reset
4-134
ME0342-4B
[Absolute Reset Process]
Note 1 Turn ON 24V power supply for PIO (and 24V power supply for brake if the actuator is
equipped with a brake) prior to turn ON the control power supply or motor power supply.
Note 2 Have the control power supply and motor power supply in common, and have them
turned ON that the same time.
4.5 Absolute Reset
ME0342-4B 4-135
4.5.2 Absolute Battery Charge
In case of use of the simple absolute type, in the first time of use or after replacing the battery,
have a continuous battery charge of 72 hours or more. The battery gets charged while the
controller is supplied with 24V power.
It is possible to retain the encoder data for the duration shown below for each hour of battery
charge.
Data holding time
Value for User Parameter No.155
Upper limit of encoder revolution at power-OFF [RPM] 100 200 400 800
Data holding time per hour of battery charge time
(Note 1)
[hour] 6.6 5.0 3.3 1.6
Holding time when fully charged
(Note 1)
[day] 20 15 10 5
Note 1 Followings are the reference values of time assuming the battery is new.
Leaving the controller power OFF for more than the data holding time will lead to a loss of the
data. Have the battery charged as early as possible.
There is life to the battery and the duration for data holding will decrease. Replace the battery
with a new one if the retaining time is remarkably dropped even with enough charging time.
(Example) From Monday to Friday ; charge for 8 hours per day, discharge for 16 hours,
Saturday and Sunday ; use with discharge
1) When the upper limit of the encoder revolution count is set at 800 [RPM]
(Setting in Parameter No. 155: 3)
Full charge amount : 24 [h] × 5 [day] = 120 [h]
Total charge amount : 8 [h] × 1.6 [h] ×5 [day] = 64 [h]
Total discharge amount : 16 [h] ×5 [day] + 48 [h] = 128 [h]
→ Assuming a start with full charge on Monday, it is necessary to fully charge
the battery every 10 days.
2) When the upper limit of the encoder revolution count is set at 400 [RPM]
(Setting in Parameter No. 155: 2)
Total charge amount : 8 [h] × 3.3 [h] × 5 [day] = 132 [h]
Total discharge amount : 16 [h] × 5 [day] +48 [h] =128 [h]
→ It is not necessary to have a continuous full charge if starting on Monday.
4-hour charge is stored every week. The upper limit is the reference value for
the retaining duration after fully charged.