Eaton ELC-PB, Programming Manual

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EL C Pro g rammi ng Manu al
F O R MORE INFORM AT ION VISIT: WWW.E ATON.COM MN05003003E 2-54
When X21=ON, ELC-PB, ELCB-PB and ELC-PC/PA/PH controllers C247 receives count signal
from X0 input terminal and counter will count up (+1) or receive count signal from X1 input terminal
and counter will count down (-1). ELC-PV controllers C247 receives count signal from X4 input
terminal and counter will count up (+1) or receive count signal from X5 input terminal and counter
will count down (-1).
When C247 attains settings K5, C247 will be on. After C247 is ON, if there is counter pulse input,
C247 will keep on counting.
C247 in ELC-PB, ELCB-PB and ELC-PC/PA/PH controllers has external input signals to reset X2.
C247 in ELC-PV controllers has external input signals to reset X6 and start X7.
The counting modes (normal frequency or double frequency) of C247 (HHSC1) in ELC-PV
controllers can be set up by D1226. The default setting is double frequency mode.
The external input contact of reset signal of C247 (HHSC1) in PV controllers is disabled by M1266.
The external input contact of start signal is disabled by M1267.
The internal input contact of reset signal of C247 (HHSC1) in ELC-PV controllers is disabled by
M1274. The internal input contact of start signal is disabled by M1275.
X21
0
1
2
3
4
5
X20
6
7
6
5
4
3
X1(X5)
count up
X0(X4)
count down
C247
present
value
Y0, C247 contact
2-phase AB input high-speed counter:
Example:
LD X20
RST C251
LD X21
DCNT C251
K5
LD C251
OUT Y0
C251
Y0
X21
C251 K5 DCNT
C251 RST
X20
When X20=ON, RST instruction is executed and resets C251 to 0, output contact is reset to off.
C251 receives A phase counting signal of X0 input terminal and B phase counting signal of X1