TA = time to START motor:
maximum 20 ms
TB = time between falling edge and rising edge of start signal:
minimum 40 ms
COMMAND SEQUENCE TO EXECUTE A POSITIONING:
RELATIVE POSITIONING:
- Enable driver (ZSW BIT 3)
- Set target quote (PNU 7)
- Set start relative positioning bit (ZSW BIT 0) to 1
- Wait Target Reached front 0-1 bit (STW BIT 11)
- Reset start relative positioning bit (ZSW BIT 0) to 0
- Wait Target Reached front 1-0 bit (STW BIT 11)
ABSOLUTE POSITIONING:
- Enable driver (ZSW BIT 3)
- Set target quote (PNU 7)
- Set start absolute positioning bit (ZSW BIT 1) to 1
- Wait Target Reached front 0-1 bit (STW BIT 11)
- Reset start absolute positioning bit (ZSW BIT 1) to 0
- Wait Target Reached front 1-0 bit (STW BIT 11)
JOG CW / JOG CCW:
- Enable driver (ZSW BIT 3)
- Set JOG CW (ZSW BIT 8) or JOG CCW (ZSW BIT 9) to 1 (start motor)
- Wait TA time to START motor (minimum 30ms) or front 0-1 of motor running bit (STW BIT 1)
- Set JOG CW (ZSW BIT 8) or JOG CCW (ZSW BIT 9) to 0 (stop motor)
- Wait zero level of motor running bit (STW BIT 1)
- Wait TB time (minimum 50ms) to start new JOG. If TB is not respected motor may be not start
HOMING:
- Connect switch or proximity sensor (NO or NC) to IN1
- Enable driver (ZSW BIT 3)
- Set maximum frequency - PNU 1 (in homing function it represents home search speed)
- Set minimum frequency - PNU 0 (in homing function it represents sensor disengage speed)
- Start homing (PNU 18) with a parameter 0x01 (HEX) for NC sensor or 0x11 (HEX) for NO sensor on IN1
Sensor not engaged:
When you write PNU 18 the motor starts immediately in CCW direction with maximum speed, then it stops on sensor and starts in CW
direction with minimum speed to disengage sensor then stops and set position register (PNU 10) to 0.
It’s very important that the motor stops with sensor engaged without get over it. To avoid this it is possible reduce maximum
frequency or reduce ramp (PNU 2)
Sensor engaged:
When you write PNU 18 the motor starts immediately in CW direction with minimum speed to disengage the sensor then it stops and
set position register (PNU 10) to 0.
NOTE: If motor starts in wrong direction during homing you must change motor phases connection (swap A1 with A2 clamps).
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Summary of Contents for EtherCAT HT7
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