CS1D-II102D Omron, CS1D-II102D Datasheet - Page 379

• Manufacturer Part Number: CS1D-II102D
• Description: CS1D Dual IO Interface Unit
• Manufacturer: Omron

Specifications of CS1D-II102D

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Computing the Cycle Time
9-4-2
Normal Processing Mode
344
Cycle Time Overview
Note
The cycle time depends on the following conditions.
1. The cycle time is not affected by the number of tasks that are used in the
2. When the mode is switched from MONITOR mode to RUN mode, the cycle
Cycle time = (1) + (2) + (3) + (4) + (5)
1: Overseeing
2: Program Execution
3: Cycle Time Calculation
Checks the I/O bus and user program
memory, checks for battery errors and
refreshes the clock.
Executes the user program, and calcu-
lates the total time taken for the instruc-
tions to execute the program.
Waits for the specified cycle time to
elapse when a minimum (fixed) cycle time
has been set in the PLC Setup.
Calculates the cycle time.
• Type and number of instructions in the user program (in all cyclic tasks
• Type and number of Basic I/O Units
• Type and number of Special I/O Units, CPU Bus Units, Inner Boards, and
• Specific servicing for the following Units/Boards
• Fixed cycle time setting in the PLC Setup
• File access in file memory, and the amount of data transferred to/from file
• Event servicing for Special I/O Units, CPU Bus Units, Inner Boards, and
• Use of peripheral and RS-232C ports
• Fixed peripheral servicing time in the PLC Setup
that are executed during a cycle, including additional cyclic tasks).
type of services being executed.
memory
communications ports
user program. The tasks that affect the cycle time are those cyclic tasks
that are READY in the cycle.
time will be extended by 10 ms (this will not, however, take the cycle time
over its limit).
• Data link refreshing and the number of data link words for Controller
• Remote I/O for DeviceNet (Master) Units and the number of remote
• Use of protocol macros and the largest communications message
• Socket services for specific control bits for Ethernet Units and the num-
Link and SYSMAC LINK Units
I/O words
ber of send/receive words
Details
Details
Details
Duplex CPU Systems: 1.9 ms
Single CPU Systems: 0.5 ms
Total instruction execution time
When the cycle time is not fixed, the time
for step 3 is approximately 0.
When the cycle time is fixed, the time for
step 3 is the preset fixed cycle time minus
the actual cycle time ((1) + (2) + (4) + (5)).
Processing time and fluctuation cause
Processing time and fluctuation cause
Processing time and fluctuation cause
Section 9-4