4 - 3
4. OPERATION AND FUNCTIONS
4.1.3 Selection of load side encoder communication system
The communication system change depending on the load side encoder type.
Refer to 3.1 for the communication system of the load side encoder.
Select the cable to be connected to CN2L connector in parameter No.PC26.
1 0
Load side encoder cable communication system selection
0: 2-wire type
1: 4-wire type
If the setting is incorrect, the load side encoder error1 (70) or load
side encoder error2 (71) occurs.
0
Parameter No.PC26
4.1.4 Setting of load side encoder polarity
CAUTION
Do not set a wrong value in the encoder direction of parameter No.PC27 (encoder
pulse count polarity selection). An abnormal operation and a machine collision may
occur if a wrong value is set, which cause a fault and parts damaged.
POINT
Parameter No.PC27 (encoder pulse count polarity selection) is not related to
parameter No.PA14 (rotation direction selection). Make sure to set the
parameter according to the relationships between servo motor and linear
encoder rotary encoder.
Do not set a wrong value in the encoder direction of parameter No.PC27
(encoder pulse count polarity selection). During the positioning operation, a
fully closed loop control error (42) may occur.
(1) Parameter setting method
Set the load side encoder polarity to be connected to CN2L connector in order to match the CCW direction
of servo motor and the increasing direction of load side encoder feedback.
Load side encoder pulse count polarity selection
0: Load side encoder pulse increasing direction in the servo motor CCW
1: Load side encoder pulse decreasing direction in the servo motor CCW
0
0
0
Parameter No.PC27
Servo motor
Linear encoder
Motor CCW derection
Address increasing direction of linear encoder
(2) How to confirm the load side encoder feedback direction
For the may to confirm the load side encoder feedback direction, refer to section 4.1.6.
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