Depending on the features of the controller, the following GDS Buffers may be available:
| Component |
Component ID |
GDS Buffer ID |
| Axioline Controller Diagnostics |
Arp.Io.AxlC |
DiagVars |
| PROFINET Controller Diagnostics |
Arp.Io.PnC |
SysVars |
| PROFINET Device Diagnostics |
Arp.Io.PnD |
SystemVariables |
| INTERBUS-Master Diagnostics |
Arp.Io.IbM |
DiagVars |
| EthernetIP Diagnostics |
Arp.Io.EthernetIP |
STATUS |
The variables in each buffer can be seen in the PLCnext Engineer global variable table for the device.