I've connected a system as below:
(PM4 Ins, add1)------>>returned ASCII String>>----RS485port(S7-300)
(PM4 Ins, add2)---|
(PM4 Ins, add3)---|
(PM4 Ins, add4)---|
(PM4 Ins, add5)---|
Anyone who can help me how to read this ASCII string(How the PLC can be programed to read this string)from each PM4 Ins, using "Poll"?
Thanks a lot!!!
(PM4 Ins, add1)------>>returned ASCII String>>----RS485port(S7-300)
(PM4 Ins, add2)---|
(PM4 Ins, add3)---|
(PM4 Ins, add4)---|
(PM4 Ins, add5)---|
Anyone who can help me how to read this ASCII string(How the PLC can be programed to read this string)from each PM4 Ins, using "Poll"?
Thanks a lot!!!
Last edited: