4.5 Absolute Position Detection
4-17
Feed Axis
Operation
4.5.3
Procedure for Setting Up the Absolute Position Detection System
This section describes the procedure for setting up the absolute position detection system.
Absolute Position Detection System Startup Flowchart
Use the following procedure to start the absolute position detection system.
To ensure that the absolute position detection system operates correctly, refer to the following section and per-
form steps 2 through 4, above, correctly.
Always perform the startup procedure for the absolute position detection system in the following situations.
• When starting the absolute position detection system for the first time
• After replacing the servomotor
• When an absolute encoder-related alarm occurs
4.5.4
Initializing the Absolute Encoder
It is necessary to initialize the absolute encoder in the following cases.
• The first time the machine is started
• When an encoder backup alarm (A.810) occurs
• When an encoder checksum alarm (A.820) occurs
• To reset the multiturn data for the absolute encoder to 0
Perform an absolute encoder reset from the SigmaWin for
Σ
-V-SD (MT) to initialize the absolute encoder.
You can also use the Write Memory command (MEM_WR: 1E hex) from the host controller.
1
Connecting and Checking Devices
Check to confirm that the absolute encoder backup battery (BA000518) is connected to the power
regeneration converter and that the servomotor has an absolute encoder (SGMGV-
8
).
↓
2
Initializing the Absolute Encoder
Set the absolute encoder to its default values.
(Refer to
4.5.4 Initializing the Absolute Encoder.
)
↓
3
Related Parameter Settings
Set all parameters related to the host controller and SERVOPACK absolute position detection.
The settings depend on whether a finite-length or an infinite-length axis is used.
↓
4
Origin Settings
Perform homing to set the absolute origin (i.e., the machine coordinate system origin).
The setting procedure depends on whether a finite-length or an infinite-length axis is used.
