Omron CJ - 09-2009 Operation Manual page 135

Specifications
Functions Provided by CJ1M CPU Units Only
Item
Built-in Built-in General-pur-
I/O inputs pose inputs
Interrupt
inputs
High-speed
counters
Quick-
response
inputs
Built-in General-pur-
outputs pose outputs
Pulse out-
puts
Variable duty
pulse out-
puts
(PWM(891)
outputs)
Estab- Origin
lishing search
the ori-
gin
Origin return Moves to the origin from any position.
Serial PLC Link
Specifications
As with Input Units, ordinary input signals are handled
according to the I/O refresh timing, and are reflected in
I/O memory.
Interrupt inputs (Direct mode):
Interrupt task numbers 140 to 143 are started at the ris-
ing or falling edge of bits 00 to 03 of CIO 2960.
Response time: 0.3 ms
Interrupt inputs (Counter mode):
Interrupt task numbers 140 to 143 are started by incre-
menting or decrementing counters for bits 00 to 03 of
CIO 2960).
Response frequency: 1 kHz
The signal inputs to the built-in input terminals are
counted. The following four types of high-speed counter
inputs can be used:
Phase-differential pulse inputs:
30 kHz (for open collector) and 50 kHz (for line driver)
Pulse + direction inputs:
60 kHz (for open collector) and 100 kHz (for line driver)
Up/down pulse inputs:
60 kHz (for open collector) and 100 kHz (for line driver)
Increment pulse inputs:
60 kHz (for open collector) and 100 kHz (for line driver)
The interrupt task can be started when the comparison
condition for the count of the high-speed counter is met.
There are two methods of comparison with the PV of
the high-speed counter:
1) Target value comparison
2) Range comparison
It is also possible to prohibit counting input signals
(gate function).
Read, as input signals, pulse signals shorter than the
cycle time (minimum pulse width: 50 µs).
As with Output Units, the contents of I/O memory are
output according to the I/O refresh timing.
Fixed duty ratio pulse signals (duty ratio: 50%) are out-
put from the built-in output terminal. Speed control
(continuous output of pulses at a specified frequency)
and positioning (output of a specified number of pulses
at a specified frequency, and then stopping) are possi-
ble.
Execute pulse outputs with a set duty ratio (the ratio of
ON time and OFF time in one pulse cycle).
Establishes the mechanical origin by pulse outputs
based on a pattern specified in the origin search
parameters.
Uses the built-in RS-232C port to exchange data
among CPU Units with no need for a program. The
Serial PLC Link can also include PTs set for NT Links
(1:N mode) combined with CPU Units.
Section 2-1
Reference
Built-in I/O Operation Manual:
5-1-2 General-purpose Inputs
Built-in I/O Operation Manual:
5-1-3 Interrupt Inputs
Built-in I/O Operation Manual:
5-1-4High-speed Counter
Inputs
Built-in I/O Operation Manual:
5-1-5 Quick-response Inputs
Built-in I/O Operation Manual:
5-2-2 General-purpose Out-
puts
Built-in I/O Operation Manual:
5-2-3 Pulse Outputs
Built-in I/O Operation Manual:
5-2-4 Variable Duty Ratio Pulse
Outputs (PWM(891) Outputs)
Built-in I/O Operation Manual:
5-3-2 Origin Search
Built-in I/O Operation Manual:
5-3-5 Origin Return
Programming Manual:
6-4-3 Serial PLC Links
87