Echelon OpenLNS User Manual

Page 1034

OpenLNS Programmer's Reference

997

If the connection members are not SNVTs, then all members must have the same length.
lcaErrConnDirectionOrPollingMismatch

An input network variable can only be connected to an output network variable, a polled

output network variable can only be connected to a polling input network variable, and

the implicit message tag msg_in can only be connected to an explicitly declared message

tag.
This error will occur if an attempt was made to connect network variables of the same

direction, network variables with mismatched polling attributes (a polled output network

variable to non-polling input network variable), or msg_in to msg_in.
lcaErrConnMtagCantUseTurnaround

An attempt was made to connect message tags in the same node (i.e., to create a

turnaround message tag connection, which is not possible).
lcaErrConnPriNotConfigurable

An attempt was made to modify the priority attribute; that attribute was not specified as

configurable.
For network variables, the priority keyword may be included as part of the connection

information in the Neuron C variable declaration. The config and nonconfig keywords

specify whether the priority designation can be modified with a network management

tool. The default is config.
The priority keyword affects output or polled input network variables.
Please refer to the Neuron C Reference Guide for more information.
lcaErrConnAuthNotConfigurable

An attempt was made to modify the authentication attribute and that attribute was not

specified as configurable.
For network variables, the authentication keyword may be included as part of the

connection information in the Neuron C variable declaration. Including the keyword

config in the declaration allows the network management tool to change the

authentication status of this network variable after a node has been installed. Setting

nonconfig prevents the authentication status from ever being changed for this network

variable. The default is config. Please refer to the Neuron C Reference Guide for more

information.
lcaErrConnSvctypeNotConfigurable

An attempt was made to modify the protocol service type attribute, and that attribute

was not specified as configurable.
For network variables, the service type can be specified in the connection information in

the Neuron C variable declaration. The options are unackd, nackd_rpt and ackd. The

keyword config is the default. This allows a network management tool to change the

service specification at installation time. The keyword nonconfig indicates that the

service type cannot be changed by a network management tool. Please refer to the

Neuron C Reference Guide for more information.
lcaErrConnNvSelectorConstraint

At most, one input network variable in a device, and in some situations only one output

network variable in a device, can use the same network variable selector, which is