Current Limit Control Options; 2.10 Analog And Digital Outputs - Santerno DCREG2 Series User Manual

DCREG2
DCREG4
2.9

CURRENT LIMIT CONTROL OPTIONS

2.9.1 In the speed and current control, the current internal limitation remains always activated. It is
generally set as single-value adjusting through parameter P050 and parameter P051 (default values:
100%) and always represents a percentage of the armature current rated value indicated by parameter
C000 (default value: 100%).
So, whenever a double-value adjusting is required, it is necessary to set also parameter P052 and
parameter P053 (default values: 100%) by fixing the switching speed threshold with parameter P054
(default value: 100%).
If a hyperbolic adjusting is to be programmed, set parameter P055, parameter P056 and parameter
P057 (default values: 100%).
2.9.2 A current overlimit (i.e. a permanent increase of the current limit) is available in case of heavy
torque demands. The limit overcurrent value may be programmed through par. P060 and P061 (default
value: 100%). If the current required is inconsistent with the max. allowable duty-cycle (150% of the
nominal current for 1min every 10min), alarm A022 will trip (Drive It Trip).
2.9.3 On the other hand, to achieve a current limit decrease through an external command, it is
necessary to close one of the MDIx configurable digital inputs by programming parameters
C130(131)(132)(133)(134)(135) at value 4:Clim (said configuration is set by default on MDI5, terminal 36),
after setting the limit decrease value on parameter P058 (default value: 50%).
2.9.4 To enable or disable one or more work quadrants of the torque / speed plan, set parameter
C160 ... C163 (default values: 1
for DCREG4).

2.10 ANALOG AND DIGITAL OUTPUTS

2.10.1 The configurable analog outputs OUT1 and OUT2 are available on terminals 8 and 10. Their
meaning is indicated by parameters P150 and P153 respectively (default value: 0V). Any analog output
OUT1, OUT2 may include Gain operator (with parameter P152 and parameter P155 respectively; default
values: 100%), Bias operator (with parameter P151 and parameter P154 respectively; default values:
0%), and Polarity operator (with parameter P157 and parameter P158 respectively; default values:
Bipolar).
By moving jumpers JP409 and/or JP4010 from pos. 1-2 (standard) to pos. 2-3, said analog outputs turn to
0 ... 2 0mA current outputs respectively (outgoing current only: for the value to be set in the parameters
relating to Gain and Bias operators, see MILLIAMPERE INPUT / OUTPUT SIGNALS chapter).
2.10.2 The two non-configurable analog outputs have been already defined: n OUT on terminal 4 and
I OUT on terminal 6. The latter may be defined as polarity of the output signal through parameter P156
(default value: Bipolar for DCREG4, and Positive Only for DCREG2).
2.10.3 There are five MDOx configurable digital outputs. They are available on terminals 25-27, 29-
31, 33-35, 37-39 and 41-43, and are defined by parameters P170(176)(182)(188)(194). The MDOx
configurable digital outputs may include functions On Delay (with parameters P171(177)(183)(189)(195)
respectively and default values: 0s), Off Delay (with parameters P172(178)(184)(190)(196) respectively
and default values: 0s), Level (with parameters P173(179)(185)(191)(197) respectively and default
values: 50%, 3%, 50%, 5%, 50%), Hysteresis (with parameters P174(180)(186)(192)(198) respectively
and default values: 2%) and Logic (with parameters P175(181)(187)(193)(199) respectively and default
values: Normally Open).
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