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Message Service Transmission Delay
Section 10-5
10-5 Message Service Transmission Delay
This section explains the maximum transmission delay that can occur
between the execution of a SEND(090), RECV(098), or CMND(490) instruc-
tion in the ladder program until completion of the instruction. This delay does
not include the time required for the tag data link or the execution time of the
ladder program itself.
10-5-1 Maximum Transmission Delays (Excluding Delays in the Network)
Use the following equation to calculate the maximum transmission delay that
can occur between the execution of a SEND(090) or RECV(098) instruction in
the ladder program until completion of the instruction.
SEND(090) Instruction
Maximum transmission delay =
CPU Bus Unit service cycle (local node)
+ CPU Bus Unit service processing time (local node)
+ Send processing
+ Transmission delay
+ Receive processing
+ CPU Bus Unit service cycle (remote node)
+ CPU Bus Unit service processing time (remote node)
CPU Bus Unit Service
Cycle (Local Node)
The following table shows the service cycle, which depends on the CPU Unit’s
CPU processing mode setting.
Note
CJ2 CPU Units support only Normal Mode.
Execution of SEND(090)
in user program
CPU Bus Unit service cycle
(Local node)
CPU Bus Unit service processing time
(Local node)
Send processing
Transmission delay
Receive processing
CPU Bus Unit service cycle
(Remote node)
CPU Bus Unit service
processing time (Remote node)
CPU data set
processing
Maximum transmission delay
CPU execution mode
Processing time details
Normal Mode (See note.)
One CPU Unit cycle time
Priority peripheral servicing
Parallel processing with syn-
chronous memory access
Parallel processing with asyn-
chronous memory access
0.2 ms + peripheral servicing time (1 ms max. for
peripheral servicing of each Special I/O Unit, CPU
Bus Unit, peripheral port, RS-232C port, and Inner
Board)
Summary of Contents for CJ2H-CPU6 - REV 02-2010
Page 2: ......
Page 4: ...iv...
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Page 14: ...xiv...
Page 18: ...xviii...
Page 38: ...12 Network Configurator Overview Section 1 5...
Page 58: ...32 Selecting the Network Devices Section 2 3...
Page 116: ...90 Auxiliary Area Data Section 4 5...
Page 222: ...196 Message Communications Errors Section 7 6...
Page 364: ...338 Using the Backup Tool Section 13 3...
Page 402: ...376 CS CJ series Ethernet Unit Function Comparison Appendix A...
Page 404: ...378 Ethernet Network Parameters Appendix B...
Page 406: ...380 TCP Status Transitions Appendix C...
Page 452: ...426 Precautions for Using Windows XP Vista or Windows 7 Appendix G...
Page 460: ...434 Index...
Page 462: ...436 Revision History...
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