YASKAWA Varispeed-616GII Instruction Manual page 41

(1) Contact during operation
The contact is closed when either the forward run command or the reverse run
command is closed, or when the inverter is outputting a voltage .
(2) Zero-speed contact
The contact is closed when the inverter output frequency is OHz .
(3) Speed-synchronization contact
The contact is closed when either the forward run command or the reverse run
command is closed, and the speeds are synchronized .
Speed-synchronization set condition :
Frequency command input - Output frequency
s 0 .5%
Speed-synchronization reset condition :
Frequency command input - Output frequency
? 3%
(4) Overtorque detection contact
The contact is closed when the inverter detects an overtorque .
(5) During low voltage (UV) contact
The contact is closed while the inverter is measuring momentary power failure
time when the mode is selected for operation to continue during momentary
power failure . The contact is open when the inverter is stopping for a peri-
od exceeding the momentary power failure time-compensation period . Use this
contact combined with the abnormality contact output .
(6) Contact for speed-synchronization at any set speed
The contact is closed when either the forward run command or the reverse
run command is closed, and speed-synchronization occurs at the input fre-
quency set by control constant 33 .
Conditions of speed-synchronization setting and resetting are the same as
stated in (3) .
(7) Output frequency detection contact
The contact is closed when the output frequency is greater than the fre-
quency set by control constant 33 .
(8) Output frequency detection contact
The contact is closed when the output frequency is less than or equal to the
frequency set by control constant 33 .