Weidmuller WI-I/O 9-L: Wireless I/O Transmitter / Receiver v1.3 - Manual (Page 12)

WI-I/O 9-L Configuration Manual
WI-I/O 9-L Wireless I/O page 12 of 108
The transmitter monitors inputs for changes, and forwards information about the state of the
inputs to other modules based on the mapping configuration.
Mappings define when to send information about the inputs to remote modules. Mappings
can be triggered by a change of value of one of the inputs or after a specified time has
elapsed since the last transmission of the information.
The transmitter provides:
Physical inputs - the discrete, analog and thermocouple signals; and
Virtual or internal inputs - - derived from the physical inputs (e.g.. setpoint inputs and
pulsed inputs).
Setpoint status
Setpoint status “inputs” are derived from analog inputs using high and low threshold levels.
Setpoint status turns “on” as the analog signal moves below the low threshold and “off” above
the high threshold. Between the low and high setpoints, the setpoint status remains
unchanged.
A rotary switch on the front of the transmitter unit lets you select between ten sets of user-
defined setpoint thresholds.
Pulsed inputs
Pulsed inputs create “count” registers derived from the discrete inputs. The WI-I/O 9-L-T
counts the number of pulses on each pulsed input and stores the count in a count register.
Each time the discrete signal changes from off to on, the pulsed input register increments by
one count.
The front panel LEDs indicate the state of the discrete inputs as well as the setpoint inputs.
The transmitter also controls two physical outputs:
Setpoint output – that indicates the status of the virtual setpoint input; and
Module OK output – that becomes active when the module’s system status indicates
there are no problems in operation.
You can also configure the module to:
Increase reliability – by sending messages multiple times. Weidmuller, Inc. testing
indicates three times gives best reliability in most systems); and
Increase message distance – by including one or more repeater stations in the
mapping.
When the module sends a message, the yellow LED on the front panel flashes.