This is an example of when using Nexto as Modbus Master to RS-485 slaves by
using a the Ethernet to RS-485 gateway, JetPort 5601.
Configuration
Nexto Modbus RTU over TCP --- TCP/IP --- JetPort 5601 --- RS485 --- NA-9173
--- NA-9173.
For each slave configured in Nexto a seperate TCP session is established,
therefore it is important that the Gateway supports multiple sessions. (This is
valid for the Modbus Symbol Client driver, by using the IEC address based
Modbus Client driver one TCP session can be created for several slaves. Another
option when using the Symbol driver is to make a sequence and disconnect the
slave after each polling))
In this case the JetPort 5601 supports 5 sessions (clients) at the same
time.
(A startup problem has been detected with the 1.06 FW in JetPort 5601. By
disabling one connection communication starts and then the other can enabled
again.)