Mitsubishi Electric MR-J4, Instruction Manual

Page: 167 / 794

4. STARTUP
4 - 12
Check for a position mismatch in the following sequence.
1) When Q ≠ P
Noise entered the pulse train signal wiring between the controller and servo amplifier, causing
command input pulses to be miscounted. (Cause A)
Make the following check or take the following measures.
Check how the shielding is done.
Change the open collector type to the differential line driver type.
Run wiring away from the power circuit.
Install a data line filter. (Refer to section 11.14 (2) (a).)
Change the [Pr. PA13 Command pulse input form] setting.
2) When P •
CMX
CDV
≠ C
During operation, SON (Servo-on), LSP (Forward rotation stroke end), or LSN (Reverse rotation
stroke end) was switched off; or CR (Clear) or RES (Reset) was switched on. (Cause C)
3) When C • ∆ℓ ≠ M
Mechanical slip occurred between the servo motor and machine. (Cause B)
4.3 Startup in speed control mode
Make a startup in accordance with section 4.1. This section provides the methods specific to the speed
control mode.
4.3.1 Power on and off procedures
(1) Power-on
Switch power on in the following procedure. Always follow this procedure at power-on.
1) Switch off SON (Servo-on).
2) Make sure that ST1 (Forward rotation start) and ST2 (Reverse rotation start) are off.
3) Switch on the main circuit power supply and control circuit power supply.
When main circuit power/control circuit power is switched on, the display shows "r (Servo motor
speed)", and in 2 s later, shows data.
(2) Power-off
1) Switch off ST1 (Forward rotation start) and ST2 (Reverse rotation start).
2) Switch off SON (Servo-on).
3) Switch off the main circuit power supply and control circuit power supply.