Eaton ELC-PB, Programming Manual

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3 . I n s t r u c t i o n S e t
M N050 03003E F or mo re infor ma tio n vi sit:
w w w. e a t o n . c o m
3-157
Generally when the pulse output is complete, the PLSY instruction must be reset so that the
instruction can be executed again. When M1347, M1348, M1524 or M1525 is enabled, the
associated output terminals (Y0~Y3) will be reset automatically when the pulse output is
complete, i.e. the PLSY instruction is reset. When the ELC scans the PLSY instruction again,
the pulse output will automatically start. Also, the ELC updates the 4 flags at the END of the
program scan. This means that the PLSY instruction in continuous pulse output mode requires
a delay time of one scan cycle for the next pulse output operation.
The function is mainly used in subroutines or interrupts which require high speed pulse outputs.
Here are a couple of examples:
Program Example 1:
M1000
EI
FEND
I 001
IRET
M1000
DPLSY K1000 K1000 Y2
I 101
IRET
SET M1524
END
DPLSY K1000 K1000 Y0
SET M1347
Description:
a) Whenever I001 is triggered, Y0 will send 1,000 pulses; whenever I101 is triggered, Y2 will
send 1,000 pulses.
b) When the pulse output is complete, there should be an interval of at least one scan cycle
before the next pulse output operation can be triggered. .