Panasonic A4P Series Overview of Absolute System, Configuration of Absolute System

Absolute System

Overview of Absolute System

In a motor of the absolute encoder specifications or absolute/incremental specifications, an absolute system can be constructed by connecting a battery for an absolute encoder and changing the setting of SV.Pr0B (absolute encoder setting) from “1” (default setting) into “0” or “2”. In the absolute system, homing is not required after turning the power supply on.

Configuration of Absolute System

The data of an absolute encoder consists of single-turn data, which output an absolute position always within single turn, and multi-turn data which counts the number of turns. When a battery for the absolute encoder is connected, the multi-turn data can be held even if the power supply turns off. This allow to hold a

home position set once, even after the	Single-turn data	131071, 0,1,2 ...... 131071, 0,1,2 ...... 131071, 0,1,
power supply is reset. For the home po-
sition setting, “Setup (Initialization) of Ab-	Multi-turn data		– 1 0	0 1	1 2
solute Encoder” on page 138.
	Motor rotating direction		CW		CCW

Battery (for Backup) Installation

First Installation of the Battery

After installing and connecting the back-up battery to the motor, execute an absolute encoder setup. Refer to P.138, "Setup (initialization) of Absolute Encoder ".

It is recommended to perform ON/OFF action once a day after installing the battery for refreshing the battery. A battery error might occur due to voltage delay of the battery if you fail to carry out the battery refreshment.

Replacement of the Battery

It is necessary to replace the battery for absolute encoder when battery alarm occurs.

Replace while turning on the control power. Data stored in the encoder might be lost when you replace the battery while the control power of the driver is off.

After replacing the battery, clear the battery alarm. Refer to P.99, "How to Clear the Battery Alarm".

<Caution>

When you execute the absolute encoder with the console (refer to P.100 of Setting), all of error and multi- turn data will be cleared together with alarm, and you are required to execute “Setup (Initialization) of abso- lute encoder” (refer to P.138).

How to Replace the Battery

1) Refresh the new battery.￿	2) Take off the cover ￿
Connector with lead wire of	of the battery box.
the battery to CN601 and
leave of 5 min. Pull out the
connector from CN601 5 min
after.

CN601￿￿
Pull out after 5 min.￿￿	Raise the latch and ￿
connection￿	take off the cover.￿￿
	￿

3)Install the battery to ￿ the battery box.

Connect ￿ the connector.

Place the battery with ￿ + facing downward.

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