This discussion applies to Remote I/O, CHARM I/O, and wireless I/O.
How you specify a Remote I/O parameter reference depends on the type of reference and where you are referencing it from.
In Control Studio, for most parameter references you can browse to Remote I/O parameters. The result is a string in the form:
controller/REMIO/RemoteZoneName/IO1/Cnn/CHnn/param
where:
controller — the name of the controller to which the remote I/O is assigned.
REMIO — a fixed system name designating the Assigned I/O subsystem under the controller.
RemoteZoneName — the Remote I/O Node name as it appears in DeltaV Explorer.
IO1 — a fixed system name indicating the parameter is in the I/O Network.
Cnn — the system string C followed by the card number in the remote I/O carrier.
CHnn — the system string CH followed by the channel number on the card.
param — the parameter name.
For example:
CTLR1/REMIO/RZONE2/IO1/C04/CH03/FIELD_VAL_PCT
However, if you are creating a dynamic reference to a remote I/O parameter it must be in the form:
controller/REMIO/Remote_ID/Cnn/CHnn/param
where:
controller — the name of the controller to which the remote I/O is assigned.
REMIO — a fixed system name designating the Assigned I/O subsystem under the controller.
Remote_ID — the Node ID of the Remote I/O Node. To find the Node ID, open the Remote I/O Node's Properties dialog in DeltaV Explorer and select the Advanced tab.
Cnn — the system string C followed by the card number in the Remote I/O carrier.
CHnn — the system string CH followed by the channel number on the card.
param — the parameter name.
For example:
CTLR1/REMIO/3581018119/C04/CH03/FIELD_VAL_PCT
One way to create the path string is to browse to the parameter from Process History View or DeltaV Operate and copy and paste the path to Control Studio and edit as needed.