Monitoring An External Encoder; Option Module Required For Monitoring; Related Parameters; Block Diagrams - YASKAWA SGD7S-1R9D Product Manual

10.4 Monitoring an External Encoder

10.4.1 Option Module Required for Monitoring

10.4

Monitoring an External Encoder

You can monitor the current value of an external encoder attached to a machine without creat-
ing a fully-closed loop.
A dual encoder system with an encoder in the Rotary Servomotor and an external encoder
attached to the machine is used, but only the encoder in the Rotary Servomotor is used in the
control loop.
The external encoder is used only to monitor the current position of the machine. You can also
use a touch probe to latch the current position of an external encoder.

10.4.1 Option Module Required for Monitoring

A Fully-closed Module (SGDV-OFA01A) is required to use this function.
Refer to the following manual for detailed information on installation.
Σ-V-Series/Σ-V-Series for Large-Capacity Models/
TOBP C720829 03)
Note: You cannot use a Safety Module (SGDV-OSA01A) if you install a Fully-closed Module.

10.4.2 Related Parameters

The parameter that is used to monitor the external encoder as the current value of the machine
is given below.
Pn00E
Set Pn002 to n.0 (Do not use external encoder) if you will not use fully-closed loop con-
trol.

10.4.3 Block Diagrams

A simple block diagram is given below to provide an overall image of monitoring an external
encoder.
Position reference
External encoder
position
(60E4 hex: 1)
10-10
Parameter

n.0
(default set- Do not use the external encoder monitor.
ting)

n.1 Use CCW as the forward direction.

n.2 Reserved setting (Do not use.)
Use CW as the forward direction. (Reverse

n.3
Rotation Mode)

n.4 Reserved setting (Do not use.)
SERVOPACK
Deviation
counter
Σ
-7-Series Installation Guide Fully-closed Module (Manual No.:
Meaning
Unit
Position
conversion
control loop
Pn20A
Speed
feedback Pn22A
When Enabled
After startup
+
Speed
Motor
−
loop
Speed
ENC
conversion
Alarm
A.d10
detection
Serial
conversion
Classification
Setup
Machine
External
encoder