Lenze 8400 - Manual (Page 1304)

18 Function library
18.1 Function blocks | L_Interpolator_1
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Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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18.1.95.2 Signal monitoring
If signal monitoring is active ( C00950/2 = 1), the signal characteristic of the dnPhIn_p input signal
is continued even if the data telegram is missing (setpoint selection via CAN).
Monitoring is performed on the basis of the dnPhIn_p position setpoint and the bSpeedAct0 status
signal:
• If the dnPhIn_p position setpoint remains the same in the next device cycle, it is either because
the speed is zero or because no data telegram has been received.
• The evaluation of the bSpeedAct0 status signal gives information about which reason applies.
This status signal needs to be transmitted by the setpoint source to ensure trouble-free
operation:
• bSpeedAct0 = FALSE means that the speed is not zero, so an error is assumed: The signal
characteristic of the dnPhIn_p input signal is completed (the current slope is retained).
• bSpeedAct0 = TRUE means that the speed is zero, so the unchanged position setpoint is not
treated as an error.
• If the number of missing data telegrams exceeds the limit value parameterised in C00952 , the
bSignalError output is set to TRUE.
• The bSignalError output is automatically reset to FALSE if correct signals are detected at
dnPhIn_p and bSpeedAct0 again.

Note!
Do not change the number of interpolation steps during operation. Otherwise the
interpolation becomes inaccurate.

Note!
The nNIn_a analog value is not monitored!