Mitsubishi Electric MELSEC iQ-R Series User Manual page 572

Setting Method
■Operating protocol setting
The protocol for operation when a device supporting the protocol version 2.0 and a device supporting the protocol version 1.0
coexist in the network can be set with 'Protocol information' (Un\G1294016 to Un\G1294031) in the buffer memory. The
setting value is enabled after the system is reset or the power is turned off and on, and it is held by the CC-Link IE TSN Plus
module. For details on the buffer memory, refer to the following.
Page 477 Protocol information (Un\G1294016 to Un\G1294031)
1.
Check the protocol currently held by the CC-Link IE TSN Plus module with 'Protocol setting status' (Un\G1294021).
2.
To change the protocol, store the set value in 'Protocol setting' (Un\G1294018) and set 'Write request' (Un\G1294017) to
1.
3.
Check that 'Write execution status' (Un\G1294019) is 1 and 'Setting result' (Un\G1294020) is 0. If the setting result is not
set to 0, check the error code and sett again.
4.
Reset the CPU modules or power off and on the system.
• The operating protocol setting can be performed with firmware version "02" or later of the CC-Link IE TSN
Plus module.
• The protocol for operation during the initialization sequence is determined and stored in 'Protocol operating
status' (Un\G1294016). Alternatively, to change the protocol before resetting the CPU module or powering
off and on the system in Step 4, change the write request to 0 and then change the protocol setting value.
After changing the value, change 'Write request' (Un\G1294017) to 1 again.
• Set the operating protocol before operating the system, when cables are not connected. If the setting is
changed during system operation, problems such as failure to update a link special relay (SB) or link special
register (SW) may occur temporarily.
Precautions
• The operating protocol can be checked with 'Protocol operating status' (Un\G1294016).
• If the slave station used is "CC-Link IE TSN Class A" and "Communication Period Setting" is set to "Low-Speed", sending/
receiving cyclic data within the "Low-Speed" period to/from the slave station with "Communication Period Setting" set to
"Low-Speed" cannot be guaranteed, depending on the setting values for the maximum response time for the time managed
polling method, communication period interval, and low-speed setting. In this case, a communication period setting error
(error code: 31ABH) occurs and the CC-Link IE TSN Plus module stops.
• If there is a slave station for which "CC-Link IE TSN Class Setting" is set to "CC-Link IE TSN Class A" and "Communication
Period Setting" is set to "Low-Speed", parameter values for guaranteeing sending/receiving cyclic data within the "Low-
Speed" period to/from the slave station with "Communication Period Setting" set to "Low-Speed" are stored in 'Multiple
cycle setting (low speed)' (Un\G1277442) and 'Communication cycle intervals (calculation value)' (Un\G1277443). Set
"Low-Speed" under "Multiple Period Setting" and "Communication Period Interval Setting" to values equal to or greater than
the values stored in 'Multiple cycle setting (low speed)' (Un\G1277442) and 'Communication cycle intervals (calculation
value)' (Un\G1277443) respectively. However, if modules selected in "Network Configuration Settings" are all general CC-
Link IE TSN modules, the parameter values are not stored in the buffer memory areas.
• If "CC-Link IE TSN Class Setting" of the general CC-Link IE TSN module added to "Network Configuration Settings" is set
to "CC-Link IE TSN Class A" and "Low-Speed" in "Multiple Period Setting" and "Communication Period Interval Setting" are
set to values of 'Multiple cycle setting (low speed)' (Un\G1277442) and 'Communication cycle intervals (calculation value)'
(Un\G1277443), the cyclic data may not be able to be sent/received. In this case, add the actual device to be used to
"Network Configuration Settings" or refer to the manual for the device used to check the maximum response time for the
time-managed polling method, calculate and set the communication cycle interval setting.
For details on troubleshooting by symptom, refer to the following.
Page 386 TROUBLESHOOTING BY SYMPTOM
APPX
570
Appendix 12 Structure of CC-Link IE TSN Class B/A Devices (Mixture of Protocol Versions 1.0 and 2.0) and Ethernet Devices