YASKAWA iQpump Series Programming Manual page 95

H5-09 Communication Error Detection Time
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Setting Range: 0.0 to 10.0 sec
Factory Default: 2.0 sec
The setting of parameter H5-09 determines the length of time that serial communications must be lost before a CE fault occurs. Setting
H5-09 = 0 will configure the iQpump drive for the quickest CE fault detection but may cause nuisance faults. The iQpump drive power
should be cycled after a change is made to this parameter.
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YASKAWA TM.iQp.02 iQpump Drive Programming Manual