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MELSEC-A
9 MAIN POSITIONING CONTROL
9.2.4 1-axis fixed-dimension feed control
In "1-axis fixed-dimension feed control" (" Da.2 Control method" = fixed-dimension
feed 1), one motor is used to carry out fixed-dimension feed control in a set axis
direction.
In fixed-dimension feed control, any remainder of the movement amount designated in
the positioning data is rounded down if less than that required for control accuracy to
output the same amount of position commands.
Operation chart
In 1-axis fixed-dimension feed control, the address (
Md.29 Current feed value) of
the current stop position (start point address) is set to "0". Positioning is then
carried out to a position at the end of the movement amount set in "
Da.5
Positioning address/movement amount".
The movement direction is determined by the movement amount sign.
00000
" Md. 29 Current feed
value" is set to "0" at
the positioning start
Designated movement
Positioning
start
amount
Reverse direction
Forward directio
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