# ID 70209

Emergency deceleration too small (less than 1 increment per cycle).
Description | The deceleration for an emergency stop is set too small in the axis parameters (see P-AXIS-00003). The position controller uses “1 increment per (cycle time)^2” as dimension of the emergency deceleration (1 increment is equivalent to 0.1 µm for translatory and 0.0001° for rotary axes). The smallest representable deceleration value in the position controller is therefore “1 increment per (cycle time)^2” or “0.0001° per cycle time^2”. The delay specified for the deceleration (dimension mm/s^2 or °/s^2) is converted into the position controller internal unit format. The acceleration value cannot be represented in the position controller if it is too small.
Response | Class | 1 | Warning output and correct the value
Solution | Class | 1 | Solution:

- Specify larger value for emergency stop deceleration, see P-AXIS-00003
- Increase the cycle time of the controller

Parameter | %1: | Logical axis number [-]
Logical axis number of affected axis, see P-AXIS-00016
%2: | Current value [1µm/s or 0.001°/s]
Specified deceleration for an emergency stop, see P-AXIS-00003
%3: | Corrected value [1µm/s or 0.001°/s]
Minimum value allowed for deceleration
Error type | 2, Error message by data transfer from parameter list into control device.