Eaton ELC-PB - 2.13 High-speed Counters

ELC Programming Manual
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2-46
6. If the MOV instruction is applied through ELCSoft to designate a value bigger than the set
value to the present value register of C0, next time when X1 goes from OFF to ON, the
contact C0 will be ON and present value of C0 will equal setting value.
X10
X11
X12
0
1
2
3
4
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
0
-7
-6
-5
-4
-3
Contacts
Y0, C0
Accumulatively
increasing
Accumulatively
increasing
Progressively
decreasing
present value
in C200
When the output contact
was On.
2.13 High-speed Counters
ELC-PB/PA/PH, ELCB-PB:
ELC High-speed counters can be 1-phase or 2 phases and can count up to a frequency of 20KHz.
The table below displays the relation to inputs X0-X5, X10-X11, and counters C235-C255. (ELC-
PB/ELCB-PB: X0-X3, ELC-PC/PA: X0-X5, ELC-PH: X0-X5, X10, X11). ELC-PC/PA: C253 (2
phase input) High-speed counter can count up to a frequency of 25KHz. ELC-PH: C255 (2 phase
input) High-speed counter can count up to a frequency of 50KHz.
1-phase input 1-phase 2 inputs 2-phase inputs
C235 C236 C237 C238 C239 C240 C241 C242 C243 C244 C245 C246 C247 C249 C250 C251 C252 C253 C254 C255
X0 U/D U/D U/D U U U A A B A
X1 U/D R R D D D B B A B
X2 U/D U/D R R R R
X3 U/D R S S S
X4 U/D
X5 U/D
X10 U/D U A
X11 U/D D B
Maximum Count Frequency for each counter (Unit: kHz)
PB 20 20 10 10 - - 20 10 - 20 - 20 20 20 - 5 5 - 5 -
PC 20 20 10 10 10 10 20 10 - 20 - 20 20 20 - 5 5 20 5 -
PA 20 20 10 10 - - 20 10 - 20 - 20 20 20 - 5 5 20 5 -
PH 20 20 10 10 10 10 20 10 100 20 100 20 20 20 100 5 5 20 5 50
U: Increasing A: A phase input S: Start input
D: Decreasing B: B phase input R: Clear input
Input X5 has two functions: