4 Operation
4.7.4 Absolute Encoder Setup and Reinitialization
4-42
4.7.4 Absolute Encoder Setup and Reinitialization
Setting up and reinitialization of the absolute encoder are necessary in the following cases.
• When starting the machine for the first time
• When an encoder backup error alarm (A.810) is generated
• When an encoder checksum error alarm (A.820) is generated
• When initializing the rotational serial data of the absolute encoder
Set up the absolute encoder with Fn008.
<NOTE>
The standard specifications of the direct drive motor include a single-turn absolute encoder, so an encoder
backup error alarm (A.810) will not occur for direct drive motors. Also, rotational serial data is always 0, so
setting up the absolute encoder is not required.
(1) Precautions on Setup and Reinitialization
• The write prohibited setting (Fn010) must be set to Write permitted (P.0000).
• Set up or reinitialize the encoder when the servomotor power is OFF.
• If the following absolute encoder alarms are displayed, cancel the alarm by using the same method as the set
up (initializing) with Fn008. They cannot be canceled with the SERVOPACK Clear Warning or Alarm com-
mand (ALM_CLR).
• Encoder backup error alarm (A.810)
• Encoder checksum error alarm (A.820)
• Any other alarms (A.8) that monitor the inside of the encoder should be canceled by turning OFF the
power.
(2) Procedure for Setup and Reinitialization
Follow the steps below to setup or reinitialize the absolute encoder.
<NOTE>
This setting can also be performed using the adjustment command (ADJ). For details on the Adjustment
(ADJ) command, refer to the
Σ
-V Series/DC Power Input
Σ
-V Series/
Σ
-V Series for Large-Capacity Models
User’s Manual MECHATROLINK-II Commands (Manual No.: SIEP S800000 54).
CAUTION
• The rotational serial data will be a value between -2 and +2 rotations when the absolute encoder setup is
executed. The reference position of the machine system will change. Set the reference position of the host
controller to the position after setup.
If the machine is started without adjusting the position of the host controller, unexpected operation may
cause injury or damage to the machine. Take sufficient care when operating the machine.
Step Panel Display Keys Description
1
Press the Key to select the utility function. And
press the or Key to select the Fn008.
2
Press the Key to view the execution display of
Fn008.
3
Keep pressing the Key until "PGCL1" is
changed to "PGCL5."
BB
Fn006:AlmHist Clr
Fn008:Mturn Clr
Fn009:Ref Adj
Fn00A:Vel Adj
- FUNCTION-
BB
Multiturn Clear
PGCL1
BB
Multiturn Clear
PGCL5
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