User Manual

Wiring with easy800
170
08/04 AWB2528-1423GB
High-speed incremental encoder counters
easy800 provides two high-speed incremental encoder
counters CI01 and CI02. The high-speed counter inputs are
hardwired to the digital inputs I1, I2, I3 and I4. These
counter relays allow you to count events independently of
the cycle time. You can enter upper and lower threshold
values as comparison values. The contacts will switch
according to the actual value. You can use a CI.. counter if
you wish to define a start value.
The CI.. counters operate independently of the cycle time.
Counter frequency and pulse shape
The maximum counter frequency is 3 kHz.
The signals must be square waves. The mark-to-space ratio
is 1:1. The signals on channels A and B must lead or lag by
90°. Otherwise the counting direction cannot be
determined.
Wiring of a counter
The following assignment of the digital inputs apply:
• I1 counter input for the counter CI01 channel A
• I2 counter input for the counter CI01 channel B
• I3 counter input for the counter CI02 channel A
• I4 counter input for the counter CI02 channel B
h
Double the number of pulses are counted as a result of the
internal method of operation of the incremental encoder.
The incremental encoder evaluates the rising and falling
edges. This ensures that the pulse count is not affected by
oscillation of a signal edge. If the number of pulses are
required, divide the value by two.