Mitsubishi Electric 800 Series Instruction Manual (Function page 171

 Home position return error
• If home position return is not normally completed, the following warnings appear on the operation panel.
Operation panel
indication
HP1 Home position return setting error
HP2 Home position return uncompleted
• Unless the home position return is completed (the ZP signal is turned ON), position control cannot be performed (except
when JOG operation during position control or the roll feed mode is enabled).
• The Home position return failure (ZA) signal is output while the home position return warning is activated. To use the ZA
signal, set "56 (positive logic)" or "156 (negative logic)" in any parameter from Pr.190 to Pr.196 (Output terminal function
selection) to assign the function.
 Sudden stop (Pr.464, Pr.1292, and X87 signal)
• When the Sudden stop (X87) signal is assigned to an input terminal, turning ON the X87 signal (normally open input) stops
the operation according to the deceleration time slope set by Pr.464 Digital position control sudden stop deceleration
time. When the deceleration time set in Pr.464 is longer than that set by the current position control command, the
deceleration time slope set by the current position control command is applied. After the operation is stopped, turning OFF
the X87 signal (normally open input) starts position control again. To input the X87 signal, set "87" in any parameter from
Pr.178 to Pr.189 (Input terminal function selection) to assign the function to a terminal.
• When the ones place of the set value in Pr.1292 Position control terminal input selection is "0", the normally open input
is applied and the operation is stopped by turning ON the X87 signal. When the ones place is "1", the normally closed input
is applied and the operation is stopped by turning OFF the X87 signal.
 Stroke end settings (Pr.464, Pr.1292, LSP signal, LSN signal, and LP
signal)
• The normally open input is applied when Pr.1292 = "0, 1, 100, or 101" for the LSP signal or "0, 1, 10, or 11" for the LSN
signal, and turning ON the signal stops the operation. The normally closed input is applied when Pr.1292 = "10, 11, 110,
or 111" for the LSP signal or "100, 101, 110, or 111" for the LSN signal, and turning OFF the signal stops the operation.
• When the Forward stroke end (LSP) signal or Reverse stroke end (LSN) signal is assigned to an input terminal, turning
OFF the LSP/LSN signal (normally closed input) stops the operation according to the deceleration time slope set by Pr.464
Digital position control sudden stop deceleration time. When the deceleration time set in Pr.464 is longer than that
set by the current position control command, the deceleration time slope set by the current position control command is
applied.
After stopped, the motor cannot be rotated in the counterclockwise (CCW) direction while the LSP signal is OFF, or in the
clockwise (CW) direction while the LSN signal is OFF (normally closed input in both cases).
170
7. Position Control
7.3 Simple positioning function by point tables
Name
• The home position setting has failed.
• Start signal for the point table positioning has turned ON without completing the
home position return. (Except in the roll feed mode)
X87 signal
(normally open input)
Speed command
0
Position
[before electronic gear]
0
Possible cause
Stop (servo lock)
Restart
unavailable
ON
Slope set by Pr.464
Position
command
Restart
available
Time
Time