12 - 29
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
(2) Software stroke limit check details
Check details
Processing when
an error occurs
1)
An error shall occur if the current value*
1
is outside the software
stroke limit range*
2
.
(Check "
Md.29 Current feed value" or " Md.30 Machine feed
value".)
2)
An error shall occur if the command address is outside the
software stroke limit range.
(Check "
Da.5 Positioning address/movement amount".)
An "axis error" will
occur, and the
operation will not start.
*
1
Check whether the "
Md.29 Current feed value" or " Md.30 Machine feed value" is set in
"
Pr.15 Software stroke limit selection".
*
2
Moveable range from the "
Pr.13 Software stroke limit upper limit value" to the " Pr.14
Software stroke limit lower limit value".
(3) Relation between the software stroke limit function and various
controls
Control type
Limit
check
Processing at check
Machine zero point return control
–
Zero point
return control High-speed zero pint return control
–
Check not carried out.
1-axis linear control
2-axis linear interpolation
control
1-axis fixed-dimension feed
control
2-axis fixed-dimension feed
control (interpolation)
Position
control
2-axis circular interpolation
control
Speed control
*
3, 4
Speed/position changeover control
*
3, 4
Checks 1) and 2) in the previous section (2) are carried
out.
For position control: The axis comes to an immediate
stop when it exceeds the software
stroke limit range.
Current value change
–
When the current value is changed, an error will not occur
even if the new address is outside the software stroke
limit range. However, an error "start outside stroke limit
+/-" (error code: 507/508) will occur at the next operation
start.
Main
positioning
control
Other
control
JUMP command
–
Check not carried out.
JOG operation
*
5
Manual
control
Manual pulse generator operation
*
5
Check 1) in the previous section (2) is carried out.
The machine will carry out a deceleration stop when the
software stroke limit range is exceeded. If the address is
outside the software stroke limit range, the operation can
only be started toward the moveable range after the error
is reset.
: Check valid
: Check only carried out at start. (If "current feed value" is set in the "
Pr.15 Software stroke limit selection", the
check will not be carried out when the
Pr.22 Current feed value is updated.)
– : Check not carried out (check invalid).
: Valid only when "valid" is set in the "
Pr.16 Software stroke limit valid/invalid setting".
*
3
: The value in "
Md.29 Current feed value" will differ according to the " Pr.22 Current feed value during speed
control" setting.
*
4
: When the unit is "degree", check is not carried out during speed control.
*
5
: When the unit is "degree", check is not carried out.
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