Error indicating the transport's circuit breaker is open: the device is
unreachable and the transport is reconnecting (or waiting to probe again),
so the request was refused without touching the wire.
This is a local error — it is never returned by modbus-rs. It is raised
by the transport when supervision is enabled and its state is Reconnecting
or Down. Refused operations do not send a request to the device.
Retry policies retry this error by default within their configured budgets.
See
ConnectionState — The transport state that produces this error.
Error indicating the transport's circuit breaker is open: the device is unreachable and the transport is reconnecting (or waiting to probe again), so the request was refused without touching the wire.
This is a local error — it is never returned by
modbus-rs. It is raised by the transport when supervision is enabled and its state isReconnectingorDown. Refused operations do not send a request to the device.Retry policies retry this error by default within their configured budgets.
See
ConnectionState — The transport state that produces this error.