87
n. When the program turns this bit ON (effective on signal’s rising edge), the
Position Control Unit outputs pulses until the origin is reached. As with ORI-
GIN SEARCH, the Position Control Unit uses data stored in the DM area
when executing ORIGIN RETURN.
Because origin and origin proximity signals are not used, the present position
relative to the origin must be known. ORIGIN SEARCH or TRANSFER DATA
(to preset the present position) must therefore be used to establish position
before ORIGIN RETURN is executed. When the origin is reached, the At-ori-
gin flag turns ON and the Busy flag turns OFF.
4–4–1
DM Area Settings
In addition to the ORIGIN RETURN speed number (described below), the
following data must also be set in order to execute ORIGIN RETURN. They
are the same as those for START, and can be set by following the instruc-
tions contained in
Section 4–1.
Initial Speed Number Bits 11 to 08 of DM word m
Speeds
DM words m+82 through m+96
Speed Units
DM word m+97
Acceleration
Bits 15 to 00 of DM word m+98
Deceleration
Bits 15 to 00 of DM word m+99
ORIGIN RETURN Speed Number
DM word m, bits 15 to 12
Set from 1 to F (hexadecimal). Refers to one of the speeds set in DM words
m+82 through m+96.
4–4–2
IR Area Settings
The ORIGIN RETURN command is valid when bit 03 of word n is ON.
n
03
(n = 100 + 10 x unit number)
ORIGIN RETURN command
ORIGIN RETURN is started at the leading edge of this bit.
4–4–3
Execution Example
ORIGIN RETURN can only be executed when the origin (0) is known. As
shown in this example diagram, acceleration and deceleration automatically
form a trapezoidal pattern, stopping at the origin.
ORIGIN RETURN
