Eaton ELC-PB, Programming Manual

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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
3-124
b) D1022=K2 (double frequency)
Signal Diagram
A-phase
B-phase
Counting up
Counting down
c) D1022=K4 (four times frequency)
Signal Diagram
A-phase
B-phase
Counting up
Counting down
4. High-speed counter provided in ELC-PV series Models:
ELC-PV series supports high speed counters. C235 ~ C240 are program-interrupt 1-phase high
speed counters with a total bandwidth of 20KHz. They can be used alone with a counting
frequency of up to 10KHz. C241 ~ C254 are hardware high speed counters (HHSC). There are
four HHSC in ELC-PV series, HHSC0 ~ 3. The pulse input frequency of HHSC0 and HHSC1 can
be a maximum of 200KHz and that of HHSC2 and HHSC3 a maximum of 20KHz (1 phase or A-B
phase). The pulse input frequency of HHSC0 ~ 3 can reach 200KHz, among which:
C241, C246 and C251 share HHSC0
C242, C247 and C252 share HHSC1
C243, C248 and C253 share HHSC2
C244, C249 and C254 share HHSC3
a) Every HHSC can only be assigned to one counter with the DCNT instruction.
b) There are three counting modes in every HHSC (see the table below):
i) 1-phase 1 input refers to “pulse/direction” mode.
ii) 1-phase 2 inputs refers to “clockwise/counterclockwise (CW/CCW)” mode.
iii) 2-phase 2 inputs refers to “A-B phase” mode.