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8 Pulse Output Units
NX-series Position Interface Units User’s Manual (W524)
8-10 Functions
8
8-10-7 Load Rejection Output Setting
You can stop the output by a pre-specified operation when the Unit enters a state that stops pulse out-
put during axis operation or when an error occurs.
You can select from the following two output stop methods: immediate stop or deceleration stop with set
deceleration rate.
• Immediate stop will stop pulse output immediately.
• Deceleration stop with set deceleration rate will decelerate the pulse output every control period by
the value that is set for the Deceleration at Load Rejection parameter until the velocity reaches 0.
*1. Pulse output is stopped immediately if an error is detected.
*2. The pulse output decelerates to a stop at the set deceleration rate. In addition to the deceleration rate calcu-
lated from the value of the Deceleration at Load Rejection, there will be a delay of up to 2% between when the
error is detected and the pulse output is stopped.
The load rejection output setting is used for the following conditions.
• When the communications state of the Unit changes from the Operational state to the Safe-Opera-
tional or Init state
• When the communications state of the Unit changes to the Error Safe-Operational state when a time-
out is detected
• When the status of the Statusword changes to any other state from the Operation Enabled state.
When the Unit communications status is Operational for a general output, the output turns ON and OFF
according to the external output that is assigned to the I/O data. If the communications status is not
Operational, the output is turned OFF according to the setting of the External Input 0 Logic Selection
parameter regardless of the status of the external output bit.
8-10-7 Load Rejection Output Setting
Parameter name Setting Default Remarks
Load Rejection Out-
put Setting
0: Immediate stop
1: Deceleration stop with set
deceleration rate.
0 Changes are applied when the power sup-
ply to the NX Unit is turned ON or the NX
Unit is restarted.
Deceleration at Load
Rejection
0 to 500,000,000 (ms) 0 • Sets the time required to decelerate from
the maximum pulse output velocity (500
kpps).
• Changes are applied when the power
supply to the NX Unit is turned ON or the
NX Unit is restarted.
Time
Time
Number of output pulses Number of output pulses
Error detected. Error detected.
Immediate Stop Deceleration Stop with Set Deceleration Rate
*1
*2
Deceleration
stop time
Deceleration stop time × 1.02 (error: 2%)
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