C.6 Cable Loss Configuration and BehaviorThis section describes the configurable cable loss feature of the drive. This feature offers a user maximum flexibility indetermining the drive response to a loss of communication.u Drive Behavior At Loss of CommunicationAfter some interval without receipt of a message, the drive can be configured to respond in one of the following manners:• Continue at last speed• Continue at last speed with Alarm• Continue at preset speed• Ramp to Stop with EF0 fault• Coast to Stop with EF0 fault• Emergency Stop with EF0 faultu APOGEE FLN PointsThree APOGEE FLN points are used to select the desired behavior:• POINT 92 – CBL LOSS TMR• POINT 91 – CBL LOSS FRQ• POINT 90 – COMM FLT ENATable C.4 Cable Loss Behavior SummaryBehavior H5-04Setting CBL LOSS TMR(Point 92) CBL LOSS FRQ(Point 91) COMM FLT ENA(Point 90)Decelerate to stop (stop time in C1-02) EF0 Fault 0 Timeout interval X OnCoast to stop EF0 Fault 1 Timeout interval X OnFast stop (stop time in C1-09) EF0 Fault 2 Timeout interval X OnContinue at last speed 3 0 X XContinue at last speed with alarm 3 Timeout interval X OnContinue at preset speed with alarm 4 Timeout interval Preset speed OnNote: 1. Communication must first be established and then lost for these features to function as described. If a drive is powered-up without acable connected or with the master controller offline, a communications timeout does not occur.2. For modes which describe the drive running after a communications timeout, a Run command must have been issued (RUN ENABLE(Point 35) = ‘On’ and either CMD RUN.FWD (Point 22) = ‘On’ or CMD RUN.REV (Point 24) = ‘On’) prior to loss of communications.For safety purposes, the drive will not automatically restart from a stopped condition. If a user requires the drive to restart automatically,additional external wiring is required to accomplish this (consult factory).Upon expiration of the communications timeout interval, a CE (Communication Error) fault will be declared and will remainuntil communication is restored.n Continue at Last SpeedIn this mode, CBL LOSS TMR (POINT 92) is set to 0, disabling the cable loss feature. The other two settings, CBL LOSSFRQ (POINT 91) and COMM FLT ENA (POINT 90), are ignored. If communication is lost, the drive maintains its lastcommanded state. The drive will not display an alarm or fault to indicate it has lost communication. This behavior can alsobe achieved by setting parameter H5-04 to 3. The drive will display an alarm and continue running. For this specific condition,the COMM FLT ENA(POINT 90) must be enabled and CBL LOSS TMR (POINT 91) should be set to a value other than 0.A CE drive alarm will be set.n Continue at Preset SpeedIn this mode, CBL LOSS TMR (POINT 92) is set to the desired interval, CBL LOSS FRQ (POINT 91) is set to the desiredpreset speed and H5-04 is set to 4. If the time between messages exceeds the timeout interval, the drive speed command,INPUT REF 1, (Point 60) is set to the CBL LOSS FRQ (POINT 91) and the drive continues running at this new speed. COMMFLT ENA (POINT 90) must be set to ON.n StopCOMM FLT ENA (POINT 90) must be set to ON. In this mode, CBL LOSS TMR (POINT 92) is set to the desired intervaland parameter H5-04 is set to a value of 0, 1, or 2. If the time between messages exceeds the timeout interval, the drive’s speedcommand, INPUT REF 1, (Point 60) is set to 0. The stopping method is determined by the setting of H5-04. A CE drive faultC.6 Cable Loss Configuration and Behavior278 YASKAWA SIEP YAIZ1U 03B YASKAWA AC Drive – Z1000 Programming Manual
