9. SPECIFICATIONS
9－138
9.5 Regenerative Resistor
9.5.1 Built-in Regenerative Resistor
Some PY2 Servo Amplifiers have built-in regenerative resistors. When the regenerative power is lower
than the permissible absorbing power of the built-in regenerative resistor, the system configuration can
be simplified by using a regenerative resistor built-in Servo Amplifier (Amplifier of 50A has built-in
regenerative resistor as standard).
Amplifier Model No. Permissible Absorbing Power Resistance
PY2A015
PY2E015
2W 100Ω
PY2A030
OY2E030
5W 50Ω
PY2A050 20W 20Ω
Table 9-21 Permissible Absorbing Power of Built-in Regenerative Resistor
1) Wiring for built-in regenerative resistor
Wiring has been done for the built-in regenerative resistor at time of shipping. However, in the case
you wish to remove it to use an external regenerative resistor instead, or to re-connect the built-in
regenerative resistor after removing it once, make sure to wire correctly observing 9.5.6 Connection of
Regenerative Resistor.
2) Setting parameters
Abnormal overheating of the built-in regenerative resistor is detected through software (Overheat
protection) at the PY2 Servo Amplifier. Therefore, correct parameter settings are required when
using a built-in regenerative resistor (Parameters for regenerative resistor have been set at time of
shipping for the built-in regenerative resistor).
9.5.2 Parameter Settings for Regenerative Resistor
Table 9-22 Parameters for Regenerative Resistor
Status of regenerative
resistor(How to process the
regenerative power)
Regenerative resistor type
Abbreviation: RGKD,
Mode4-Page9
Regenerative resistor OL time
select
Abbreviation: Func2 bit4,
Mode2-Page3
Regenerative resistor not
connected
None/Ext.R Func2 bit4 = “0”
External regenerative resistor
connected
(External regenerative resistor
with 20W or less permissible
absorbing power is used.)
None/Ext.R Func2 bit4 = “0”
External regenerative resistor
connected
(External regenerative resistor
with larger than 20W permissible
absorbing power is used.)
None/Ext.R Func2 bit4 = “1”
Built-in regenerative resistor
used
Built-in R Func2 bit4 = “0”
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