Cycle Time Calculation Example; Online Editing Cycle Time Extension - Omron CP1L-EL20DR-D Operation Manual

Computing the Cycle Time
2-7-5

Cycle Time Calculation Example

Conditions
Calculation Example
2-7-6

Online Editing Cycle Time Extension

The following example shows the method used to calculate the cycle time
when CP-series Expansion I/O Units only are connected to a CP1L-EL/EM
CPU Unit.
Item
CP1L-EL/EM
User program
Ethernet port connection
Fixed cycle time processing
Serial port connection
Other peripheral servicing
Process name
(1) Overseeing
(2) Program execution
(3) Cycle time calculation (Minimum cycle time not
(4) I/O refreshing
(5) Peripheral servicing
Cycle time
When online editing is executed to change the program from the CX-Program-
mer while the CPU Unit is operating in MONITOR mode, the CPU Unit will
momentarily suspend operation while the program is being changed. The
period of time that the cycle time is extended is determined by the following
conditions.
• Number of steps changed
• Editing operations (insert/delete/overwrite)
• Types of instructions
The cycle time extension for online editing is negligibly affected by the size of
task programs. If the maximum program size for a task is 10 Ksteps, the
online editing cycle time extension will be as follows:
CPU Unit
CP1L-EL/EM CPU Unit
When editing online, the cycle time will be extended by according to the edit-
ing that is performed. Be sure that the additional time will not adversely affect
system operation.
CP1W-40EDR
40-pt I/O Unit
5 K steps
Yes and no
No
No
No
Calculation
---
0.55 μs × 2,500 + 1.1 μs
× 2,500
set)
0.39 ms
(Only Ethernet port con-
nected)
(1) + (2) + (3) + (4) + (5)
Increase in cycle time for online editing
Maximum: 16 ms, Normal: 12 ms
(for a program size of 10 Ksteps)
Section 2-7
Details
1 Unit
LD instructions: 2.5 K steps,
OUT instructions: 2.5 K steps
Processing time
Ethernet port Ethernet port
connected not
connected
0.4 ms 0.4 ms
4.1 ms 4.1 ms
0 ms 0 ms
0.39 ms 0.39 ms
0.1 ms 0 ms
4.99 ms 4.89 ms
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