In a mixed application with Ethercat and Modbus masters, you see an influence on Modbus update to Ethercat task / sending frames- How could this be avoided?
You need a proper seperation of the use of the modbus io's and ethercat
io's according to the task which does the buscycle update:
1. Set Ethercat
master in 'PLC Settings' as' Buscycle Task' - and Ethercat
io's are only used in ethercat
task context (in that case in PLC_PRG)
2. specify on Modbus master the update task for Modbus - and Modbus io's are only used in Modbus task context ( in that case in ModbusPRG)
3. Check if these rules are ok with 'task deployment' tap - Rule: Ethercat
io's are only updated in the Ethercat
task - Modbus io's are only updated on the Modbus task context - this you see with the red cross on each used io.
check online help for 'bus cycle'Back to FAQ overview