4-7
IM XL100C-E
1
2
3
4
5
6
7
App
Index
Modbus Protocol
4.5
Data Dropout Handling of the Modbus Master
If the read cycle is exceeded before the response to the previous command is completed
when the XL100 is communicating with multiple slave devices, a data dropout occurs
from not being able to send the command within the read cycle.
If this happens, change the read cycle, timeout value, and retrials to appropriate settings
by referring to the figure below.
1. When the response from the slave device takes a long time
Read cycle
Data dropout
(Slave 2 and 3)
Data dropout
(Slave 3)
Slave device 1
Slave device 2
Slave device 3
2. When there is no response from the slave device (retrials = 1)
Read cycle
Timeout value
Data dropout
(Slave 2 and 3)
Slave device 1
Slave device 2
Slave device 3
