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APPX
Appendix 6 Processing Time
Communication cycle intervals
The minimum value of the communication cycle interval (cyclic data transfer processing time) is calculated by the following
calculation formula. The parts enclosed in double quotation marks (" ") in the table of Variable are the values set for "Network
Configuration Settings" under "Basic Settings".
Precautions
When cyclic transmission is not performed with a calculation value
The minimum values for communication cycle interval and cyclic transmission time calculated by the formulas serve as a
guide. If cyclic transmission is not performed with a calculation value as a setting value, add the largest value below to the
minimum value of the cyclic transmission time and set the value again.
• 10% of minimum value of the calculated cyclic transmission time
• Communication speed of the master station is 1Gbps: Number of device stations 2s
• Communication speed of the master station is 100Mbps: Number of device stations 20s
Each calculation value obtained from the calculation formulas mentioned above are stored in the following SW.
• SW0072: Communication cycle interval (calculation value) [s]
• SW0073: Cyclic transmission time (calculation value) [s]
• SW0078: Transient transmission time (calculation value) [s]
When the calculation value is larger than the set value
If each calculation result is larger than the set value of "Basic Period Setting" under "Basic Settings" as follows, an error
occurs.
When an error occurs, each calculation value is displayed in "Detailed information" in the [Error Information] tab of module
diagnostics. Correct each set value of "Basic Period Setting" referring to the calculation value displayed so that the set value
is equal to or larger than the calculation value.
• 3010H: When the communication cycle interval (calculation value) [s] is larger than the set value of "Communication
Period Interval Setting"
• 3011H: When the cyclic transmission time (calculation value) [s] is larger than the set value of "Cyclic Transmission Time"
• 3013H: When the transient transmission time (calculation value) [s] is larger than the displayed value of "Transient
Transmission Time"
When a general CC-Link IE TSN module is CC-Link IE TSN Class A
When "CC-Link IE TSN Class Setting" of the general CC-Link IE TSN module added to the list of stations in "Network
Configuration Settings" is set to CC-Link IE TSN Class A and 'Communication cycle interval (calculation value)' (SW0072)
and 'Cyclic transmission time (calculation value)' (SW0073) are set to "Communication Period Interval Setting" and "Cyclic
Transmission Time", the cyclic transmission may not be performed. In such a case, perform either of the following operation.
• Select the device to be actually used from "Module List" and add the device to the list of station.
• Check the maximum response time for the time-managed polling by referring to the manual of device to be used, and
calculate and set the values of the communication cycle interval and cyclic transmission time.
Communication mode Master station communication speed Reference to calculation formula
Unicast mode 1Gbps Page 287 Unicast mode (1Gbps)
100Mbps Page 291 Unicast mode (100Mbps)
Multicast mode 1Gbps Page 295 Multicast mode (1Gbps)
100Mbps Page 299 Multicast mode (100Mbps)
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