Eaton ELC-PB, Programming Manual

Page: 309 / 728

E L C P r o g r a m m i n g M a n u a l
F o r m o r e i nf o r m a t i o n v i sit :
w w w. e a t o n . c o m
MN05003003E
3-140
Timing diagram
2000
2400
0
X30
Y0
Y1
Y2
0
High speed
forward
Low speed
forward
Stop
Current value of
C251 counter
Speed of variable
speed rotational
equipment
Program Example 3:
1. Program Example 3 is only applicable to ELC-PV series.
2. The multiple set values comparison mode: If D of DHSZ instruction designates a special
auxiliary relay M1150, the instruction will be able to compare the present value in the high
speed counter with many values in a table.
3. In this mode,
-
S
1
: starting value in the comparison table.
S
1
can only use the D data registers and can
also utilize the index registers E and F. Once this mode is enabled,
S
1
cannot be
changed even if the index registers E and F are changed.
-
S
2
: the amount of data in the group to be compared.
S
2
can only be a constant value K1 ~
K255 or H1 ~ HFF and does not support the index registers E and F. Once this mode is
enabled,
S
2
cannot be changed. If
S
2
is not within its range, error code 01EA (hex) will be
displayed and the instruction will not be executed.
-
S
: high speed counter number (C241 ~ C254).
-
D
: Designated mode (determined by M1150)
4. The number of start registers designated in S1 and the number of rows (groups) designated in
S2 construct a comparison table. Enter the values in every register in the table before
executing the instruction.
5. When the present value of the counter C251 (S) equals the values in D1 and D0, the Y output
designated by D2 will be reset to Off (D3 = K0) or On (D3 = K1) and be maintained. Output Y
will be processed as an interrupt. The number of Y output points are in decimal (range: 0 ~