Online Editing Cycle Time Extension; I/O Response Time - Omron CJ2 CPU UNIT SOFTWARE User Manual

12-2-5 Online Editing Cycle Time Extension

Online editing can be executed from the CX-Programmer while the CPU Unit is in MONITOR mode.
The cycle time will be extended by approximately 1 ms due to the write processing for the CPU Unit
program. If you do not want the cycle time to be extended by a particular amount, use the online editing
prohibit (standby) function. For details, refer to 10-7-4 Online Editing.

12-2-6 I/O Response Time

The I/O response time is the time it takes from when an Input Unit's input turns ON, the data is recog-
nized by the CJ-series CPU Unit, and the user program is executed, up to the time for the result to be
output to an Output Unit's output terminals.
The length of the I/O response time depends on the following conditions.
• Timing of Input Bit turning ON.
• Cycle time.
• Type of Rack to which the Input and Output Units are mounted (CPU Rack or Expansion Rack).
CJ-series Basic I/O Unit Response Times
Minimum I/O Response Time
The I/O response time is shortest when data is retrieved immediately before I/O refresh of the CPU
Unit.
The minimum I/O response time is the total of the Input ON delay, the cycle time, and the Output ON delay.
Note The Input and Output ON delay differs according to the Unit used.
Input
(Refreshed in CPU Unit)
Output
CJ2 CPU Unit Software User's Manual
Input ON delay
Cycle time Cycle time
Instruction Instruction
execution execution
Output ON delay
Minimum I/O response time
12 CPU Unit Cycle Time
I/O refresh
12
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