Hi
I'm using the 3964R protocol to communicate with a siemens PLC.
Sometimes after the PLC sends the host a telegram the communication between the host to the PLC breaks, the PLC continues to send NAKs.
example:
host:<02>
PLC: <10>
host:<00><00><41><44><08><03><00><02><ff><ff><00><00><01><00><10><03><1e>
PLC: <10><02>
host:<10>
PLC: <00><00><00><4c><10><03><5f>
host:<10>
PLC: <02>
host:<10>
PLC:<00><00><41><44><00><00><00><08><ff><ff><00><53><11><98><00><00><02><00><00><01><15><00><00><00><20><10><10><10><03><f2>
host:<10><02>
PLC: <10>
host:<00><00><00><00><10><03><13>
PLC: <10>
host:<02>
PLC: <15><35>
host:<02>
PLC: <10>
host:<02><00><00><41><44><08><03><00><08><ff><ff><00><04><12><00><02><00><08><00><01><00><00><00><00><00><00><00><10><03><08>
PLC: <15><34>...
Does anybody have any idea what is the problem and how to solve it?
Is the byte after the NAK an error code?
Thanx
I'm using the 3964R protocol to communicate with a siemens PLC.
Sometimes after the PLC sends the host a telegram the communication between the host to the PLC breaks, the PLC continues to send NAKs.
example:
host:<02>
PLC: <10>
host:<00><00><41><44><08><03><00><02><ff><ff><00><00><01><00><10><03><1e>
PLC: <10><02>
host:<10>
PLC: <00><00><00><4c><10><03><5f>
host:<10>
PLC: <02>
host:<10>
PLC:<00><00><41><44><00><00><00><08><ff><ff><00><53><11><98><00><00><02><00><00><01><15><00><00><00><20><10><10><10><03><f2>
host:<10><02>
PLC: <10>
host:<00><00><00><00><10><03><13>
PLC: <10>
host:<02>
PLC: <15><35>
host:<02>
PLC: <10>
host:<02><00><00><41><44><08><03><00><08><ff><ff><00><04><12><00><02><00><08><00><01><00><00><00><00><00><00><00><10><03><08>
PLC: <15><34>...
Does anybody have any idea what is the problem and how to solve it?
Is the byte after the NAK an error code?
Thanx
