The VsdAvai function block indicates the availability of a maximum of 8 VSDs by processing the inputs of the individual VSDs.
The inputs processed by the function block may include:
othe physical state (power OK)
othe mode of the VSD (automatic or manual mode)
oa detected alarm state (for example, no response)
oa detected hardware error (for example, motor circuit breaker tripped)
oa detected connection loss between the controller and distributed I/O modules that may be involved in detecting the status of the VSD
