Omron CS1W-LC001 Operation Manual page 59

Specifications
Item
Execu- Load rate
tion of
function
blocks
External I/O refresh cycle
Internal Number of
Operation control loops
Number of
operations for
process
(excluding
control)
Sequence
control
Control PID control
method
Possible control
type
combinations
Alarm Integrated into
PID block
Alarm block
Internal analog signal
Operating status monitor
method
External External I/O
I/O signals
External contact
I/O signals
CPU Unit analog
data I/O
CPU Unit contact
data I/O
CPU Unit analog
data I/O
CPU Unit contact
data I/O
Analog/contact
I/O with SCADA
software
The "load rate" refers to the ratio between the actually applied execution time and preset
operation cycle.
The maximum value and current value are displayed for each operation cycle group on the
CX-Process Tool.
A load rate of 60% or less is required in all operation cycle groups.
When the load rate continuously exceeds 70% for ten times, the load rate automatically
changes to the next longer operation cycle. (This is called the "automatic operation cycle
switching function.")
Note: Operation of the Loop Control Unit is automatically stopped when the operation
cycle of all function blocks is set to two seconds, and the load rate continuously
exceeds 70% for ten times.
The time from external input of analog signals up to external output of analog signals on a
single control loop depends on the function block's operation cycle and the CPU Unit's
cycle time. Generally, the external I/O refresh cycle is obtained by adding "approximately 1
to 5 times the CPU Unit's cycle time" to "approximately 1 to 3 times the operation cycles of
the Loop Control Unit's function blocks." (For a detailed description of how to calculate the
external I/O refresh cycle, see 3-2 Description of Operations.)
Max. 32 loops (Max. 32 ON/OFF control, Basic PID blocks and Advanced PID blocks and
other control blocks can be used simultaneously.)
Note: The maximum number of control loops is restricted by the operation cycle. In most
cases (when there is no Step Ladder Program), the maximum number of control
loops is 32 loops at operation cycles of 2, 1 and 0.5 seconds; 16 loops at an
operation cycle of 0.2 seconds; and 8 loops at an operation cycle of 0.1 seconds.
Max. 250 blocks
Max. 100 blocks per unit and total max. 4000 commands per unit
Divisable to max. 100 commands per block and max. 100 steps per block (max. 100
commands per step)
PID with two degrees of freedom
Basic PID control, cascade control, feedforward control, sample PI control, dead time
compensation, PID control with differential gap, override control, program control, time-
proportional control and other control types can be achieved by combining function blocks.
4 PV alarms (high/high limit, high limit, low limit, low/low limit) per PID block, 1 deviation
alarm
High/Low Alarm block, Deviation Alarm block
Min. -320.00% to max. +320.00%
Scaling of the engineering units depends on the CX-Process Tool (sold separately).
Monitoring/setting by engineering units depends on CX-Process Monitor (sold separately).
Executed by CX-Process Monitor (sold separately)
By data exchange with Analog I/O Unit via
the Field Terminal block
By data exchange with Basic I/O Unit via
the Field Terminal block
By data exchange with CPU Unit I/O
memory via the CPU Unit Terminal Block
By data exchange with CPU Unit I/O
memory via the CPU Unit Terminal Block
By data exchange with CPU Unit I/O
memory via the Expanded CPU Unit
Terminal Block (direct I/O with other
function blocks, and I/O of parameter
ITEMs on other function blocks possible)
By data exchange with CPU Unit I/O
memory via the Expanded CPU Unit
Terminal Block (direct I/O with other
function blocks possible)
Data transfer between Loop Control Unit
and I/O memory in CPU Unit for Control,
Operation, and External Controller blocks
using Send/Receive All Blocks.
Description
Total number of I/O points:
(max. 8 points on Analog Input Unit or Analog
Output Unit, or max. 96 points on Basic I/O
Unit) x 80 blocks
Total number of I/O points:
(8 words or 128 contacts on CPU Unit) x 16
blocks
Total number of I/O points:
(64 words or 64 contacts on CPU Unit) x 32
blocks
Total number of I/O points:
313 blocks max. x 20 words/block = 6,280
words allocated in CPU
Section 1-3
39