MetAldaMan
Member
Hello,
I would like to know the best way to find the source of data in a holding register. I am using Proworx NXT with various Modicon PLCs.
Example:
I find a register, 4xxxx1, being used in a program. A search for this register shows no other locations for it aside from the place where I saw it within the specific PLC that I am working on.
It is my understanding that a MSTR command in another PLC on the network can access and write to any registers it wants to in any plc on the network, aside from protected registers. Please correct me if I'm wrong.
Considering that I believe the previous statement to be true, I am under the impression that I would have to search every MSTR command on every PLC on the network to find every possible instance where my original 4xxxx1 register could be being altered.
I really hope I'm wrong about that. I want to know the best way(s) to find the source of communicated data in a modicon PLC program. Please advise.
Thanks!
I would like to know the best way to find the source of data in a holding register. I am using Proworx NXT with various Modicon PLCs.
Example:
I find a register, 4xxxx1, being used in a program. A search for this register shows no other locations for it aside from the place where I saw it within the specific PLC that I am working on.
It is my understanding that a MSTR command in another PLC on the network can access and write to any registers it wants to in any plc on the network, aside from protected registers. Please correct me if I'm wrong.
Considering that I believe the previous statement to be true, I am under the impression that I would have to search every MSTR command on every PLC on the network to find every possible instance where my original 4xxxx1 register could be being altered.
I really hope I'm wrong about that. I want to know the best way(s) to find the source of communicated data in a modicon PLC program. Please advise.
Thanks!