Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 143

[Md.425] Auxiliary shaft clutch slippage (accumulative) (R: D39128L+32n/Q:
D13608L+30n)
The accumulative slippage amount with the slippage method is stored as a signed value.
The absolute value of the accumulative slippage increases to reach the slippage at clutch ON during clutch ON.
The absolute value of the accumulative slippage decreases to reach 0 during clutch OFF.
Monitoring of the accumulative slippage is used to check the smoothing progress with the slippage method.
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6 SYNCHRONOUS CONTROL
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6.7 Synchronous Control Monitor Data