Mitsubishi MOTION CONTROLLERS Q172DCPU Manuel d'instructions Page 208

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8 OUTPUT MODULE
< Example > Switching between cam No.1 and No.2, and switching timing
between stroke amount I
1 and I2 when the stroke amount/cam
No. change point is set as "0".
1 cycle
1
l
2
1
l
1
2
2
l
2
Nc-1, 0Nc-1, 0Nc-1, 0
l1
Current value within 1 cam
shaft revolution [PLS]
Nc : Number of pulses within
1 cam shaft revolution
Cam No. setting device
value
Stroke amount setting
device
Execute cam No.
Execute stroke amount
(c) Error causes at the changing stroke amount/cam No. during operation
1) The cam No. and stroke amount are always input at the switching from
real mode to virtual mode and in the virtual mode.
A relative check is executed at the time of input. An error occurs in the
following cases, the error detection signal (M2407+20n) turns on and the
error code is stored in the minor error code storage register.
• The stroke amount is outside the range of 1 to 2147483647 (2
31
-1).
"Lower stroke limit value + Stroke amount"
"2147483647 (2
31
-1)" is
not satisfied in the two-way cam mode.
• The control mode of cam No. is not same.
2) Processing for the cam No./stroke amount error
• If the error occurs at switching from the real mode to virtual mode, it
does not switch to the virtual mode.
• If the error occurs at reaching the preset "stroke amount, cam No.
change point" (during cam operation), operation continues without
switching to the preset stroke amount/cam No.
Reset the error detection signal and minor error code storage register
by the error reset command (M3207+20n).
3) Processing for the error
a) If the error occurs at switching from the real mode to virtual mode,
correct by the following procedure.
• Turn the real mode/virtual mode switching request flag (M2043) off.
• Correct the cam No. and stroke amount.
• Turn the real mode/virtual mode switching request flag on, and switch
to virtual mode.
b) If the error occurs during cam operation, correct the cam No. and
stroke amount.
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