Technical Manual for EA350 Analog Pulse Type Servo Driver V101 Parameter functions: Sets hysteresis level of AI1 and AI2 analog input respectively. When adjusting speed or torque using analog, the analog actually detected by the driver might be subject to fluctuations due to electromagnetic interference and internal sampling circuit despite that the analog setting remains unchanged, leading to unstable speed or torque setting. This can be improved by adjusting this parameter. Usage: When a constant analog signal (non-zero, recommended to be greater than 1V) is set externally, monitor the values of d0-14 (AI1 channel) and d0-15 (AI2 channel).
If an unaccetable fluctuation is identified, increase P6-27 (AI1 channel) and P6-28 (AI2 channel) appropriately so that the values monitored becomes stable. The greater the hysteresis, the greater the steps of speed or torque commands, i.e. the less possible to adjust the speed or torque to a certain value via analog. For example, if the hysteresis coefficient is 4, it’s might be the case that the speed command can be adjusted to 100 rpm or 102 rpm, but 101 rpm is unable to reach. Caution ☞ Parameter functions: Sets the offset voltage of AI1 and AI2 analog input respectively. External analog might be subject to some DC offset voltage due to the circuit.
For example, if the external setting is 5V, the collected voltage displayed by the driver might be 5.2 V. This can be corrected through this parameter. Usage: Measure the voltage actually set by AI1 and AI2, and check the values displayed by d0-14 and d0-15. If the difference between them is XmV, set P6-29 and P6-30 as X, and the deviation is eliminated.
180 P6-27 AI1 hysteresis Initial value 2 Communication address 061BH Unit - Time of taking effect With immediate effect Setting range 0~300 Data size 16bit Control mode P S T P6-28 AI2 hysteresis Initial value 2 Communication address 061CH Unit - Time of taking effect With immediate effect Setting range 0~300 Data size 16bit Control mode P S T P6-29 AI1 offset Initial value 0 Communication address 061DH Unit mV Time of taking effect With immediate effect Setting range -3000~3000 Data size 16bit Control mode P S T P6-30 AI2 offset Initial value 0 Communication address 061EH Unit mV Time of taking effect With immediate effect Setting range -3000~3000 Data size 16bit Control mode P S T