Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 71

CPM2A/CPM2C High-speed Counters
50
Pulse + Direction Input Mode
In the pulse + direction input mode, pulse signals and direction signals are input,
and the count is incremented or decremented according to the direction signal
status.
Maximum frequency: 20 kHz
ON
Pulse inputs
OFF
ON
Direction
inputs
OFF
Up/Down Pulse Input Mode
In the up/down pulse input mode, CW signals (up pulses) and CCW signals
(down pulses) are input, and the count is incremented or decremented accord-
ingly.
Maximum frequency: 20 kHz
ON
CW inputs
OFF
ON
CCW inputs
OFF
Count
Increment Mode
In the increment mode, pulse signals are input and the count is incremented with
each pulse. IR 00001 can be used as an ordinary input.
Maximum frequency: 20 kHz
Pulse inputs
When the differential phase input mode is used, the inputs must be 4X differen-
tial phase inputs. When an encoder is connected in this mode, the number of
counts per revolution will be four times the encoder resolution. When selecting
an encoder take into account the relationship with the number of counts that are
possible.
Count
Nms Frequency =
Incremented
1,000
Nms Frequency =
ON
OFF
Count
Nms Frequency =
Section 2-2
1,000
N
Decremented
N
1,000
N