Ristrictions At Absolute Position System Use - Mitsubishi Electric MELSEC Q Series User Manual

10 FUNCTION DETAILS

10.4.2 Ristrictions at absolute position system use

" Software
Pr.4
⎛
stroke limit upper limit
⎝
"
(Note-2)
value"
" Software
Pr.6
⎛
stroke limit lower limit
⎝
"
(Note-2)
value"
-2147483648 + " OP address"
Pr.52
(Note-1): Fractions omitted
(Note-2): "-2147483648 to 2147483647" can be set when the calculated result is outside the settable range "-2147483648 to 2147483647".
(Note-3): Use " OP address" set at OPR for the setting range check at first PLC READY ON.
Pr.52
If the current value is outside the software stroke limit range (prohibited area), the
servo can be moved in the direction of the movement allowed area. However,
execute the start operation after resetting the errors.
Prohibited area
Movement
prohibited
Currnet position
POINT
The software stroke limit is also valid at incompletion of OPR. In the absolute
position system, the current position address becomes the outside the movement
allowed area differing from a position of the actual machine, the JOG operation
might be impossible according to the machine specifications. Execute the current
value change to the rough position matched to the actual machine, and then
execute the OPR.
The range that the current value can be restored changes by setting value of the
electronic gear and OP address at absolute position system use ("1: Valid" is set in
" Absolute position detection system" of servo parameter). Set the software
Pr.303
stroke limit range within the range that the current value can be restored as follows.
• Electronic gear numerator > Electronic gear denominator
2147483647
Electronic gear numerator"
Pr.0
-2147483647
Electronic gear numerator"
Pr.0
• Electronic gear numerator Electronic gear denominator
" Software stroke limit upper limit
Pr.4
(Note-2)
value"
(Note-3)
" Software stroke limit lower limit
Pr.6
(Note-2)
value"
Sftware limit
Movement allowed area
(Including the bounds)
Movement allowed
⎞
(Note-1)
× " Electronic gear denominator" + "
Pr.2
⎠
⎞
(Note-1)
× " Electronic gear denominator" + "
Pr.2
⎠
or
10 - 10
MELSEC-Q
OP address"
Pr.52
OP address"
Pr.52
2147483647 + " OP address"
Pr.52
(Note-3)
(Note-3)
(Note-3)