Network Topology; Communication Period Setting - Mitsubishi Electric RD78G4 User Manual

Network Topology

Select the network topology type according to the actual network configuration.
Setting is not required and can be left as "Line/Star" (default).

Communication Period Setting

Perform basic cycle setting.
Item
Basic Period Setting in Units of 1s
Setting
Communication Period Interval Setting
(Do Not Set it in Units of 1s)
Communication Period Interval Setting
(Set it in Units of 1s)
System Reservation Time
Cyclic Transmission Time
Transient Transmission Time
Multiple Cycle Normal-Speed
*3
Setting
Low-Speed
*1 An error will occur when a value outside the setting range is set.
*2 When the cyclic transmission time is 31.25 s or 62.5 s, no error will occur even though the calculation result of the transient
transmission is the lower limit value or less.
*3 The setting is invalid.
When the TSN hub is used, set TS0 to TS2. (Timeslot information from the setting values in "Communication
Period Setting")
Setting values of TS0 to TS2 can be checked with the buffer memory. ( Page 89 Timeslot information)
Precautions
There are slave devises which does not correspond to some communication piriod setting . Check the specifications of each
devise.
2 PARAMETER SETTINGS
38
2.3 Basic Settings
Description
Select whether to set the basic cycle in increments of 1s.
Select a communication cycle.
*1
Input a communication cycle interval.
Necessary time for the system to guarantee the
communication cycle interval.
When using an authentication class B/A device with a
communication speed of 100Mbps in the basic cycle, select
200s.
Of communication cycle intervals, set the time to be allocated
to cyclic transmission.
The value of "Communication Period Interval Setting" minus
"Cyclic Transmission Time" and "System Reservation Time" is
displayed.
Secure 14.00s or more.
Select the "Normal-Speed" cycle for a basic cycle.
Setting is not required and can be left as "4".
Select the "Low-Speed" cycle for a basic cycle.
Setting is not required and can be left as "16".
*2
Setting range
• Set
• Not set
(Default: Not set)
• 125.00s
• 250.00s
• 500.00s
• 1000.00s
• 2000.00s
• 4000.00s
(Default: 1000.00s)
125.00s to 4000.00s (in
increments of 1s)
(Default: 1000.00s)
• 20.00s
• 200.00s
(Default: 20.00s)
5.00s to 3966.00s (in
increments of 1s)
(Default: 500.00s)
14.00s to 3975.00s (in
increments of 1s)
(Default: 480.00s)
4 times
16 times