9
PROGRAMMING
9.2 Program Example for Normal System Configuration
9.2.3 When using the automatic communication function and the communication by dedicated instructions on the same channel
9 - 20
9
PROGRAMMING
10
DEDICATED
INSTRUCTIONS
11
TROUBLESHOOTINGAPPENDICESINDEX
(4) Setting and programming for normal execution of dedicated instructions
(a) Setting the request interval timer of the automatic communication parameter
Set the request interval timer to ensure the timing for dedicated instruction
execution.
When setting the request interval timer, the following condition must be satisfied:
Request interval timer[ms] Tarb + Tdrb + St + 10ms
*1
* 1 The result of Tarb+Tdrb+St is rounded up in 10ms units.
* 2 Set a value greater than the automatic communication function communication time (Tac).
( Appendix 3)
* 3 Set a value greater than the dedicated instruction processing time (Trc).( Appendix 3)
* 4 To execute multiple dedicated instructions consecutively within the reserved time, totalize the
response monitoring timer values/broadcast delay values for the number of the dedicated
instructions to be executed.
Table9.6 Calculation items for the request interval timer
Setting item Description Unit
Tar b
Response monitoring timer value/Broadcast delay value for the automatic
communication function
*2
ms
Tdrb
Response monitoring timer value/Broadcast delay value for dedicated
instructions
*3*4
ms
St Local station scan time ms
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