Analog inputs, Configuration configuration example, Configuration – Rockwell Automation 20D PowerFlex 700S AC Drives with Phase II Control Reference Manual User Manual

Page 14: Configuration example, Analog input specifications, Analog input configuration

Advertising
background image

14

Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011

Chapter 1 Detailed Drive Operation

Configuration

Parameters 365 [Fdbk LsCnfg Pri] through 399 [Position ErrCnfg] program the
response of the drive to various conditions. Responses include Ignore, Alarm,
Fault Coast Stop, Fault Ramp Stop, and Fault Current Limit Stop.

Parameters 326 [Alarm Status 1] through 328 [Alarm Status 3] identify any
alarms that are active.

Configuration Example

Parameter 376 [Inv OL Pend Cnfg] is set to a value of 1 “Alarm”. This configures
the drive to set the alarm bit, parameter 326 [Alarm Status 1], bit 15 “Inv OL
Pend”, when the inverter overload pending event occurs. This alarm will allow the
drive to continue running and the user can make the decision as to what action to
take in relation to the alarm.

Analog Inputs

Analog Input Specifications

There are three analog inputs. Inputs 1 and 2 are differential, configurable for +/-
10V or 0…20 mA via dip switches. The A/D (analog to digital) converter is 13
bit plus the sign bit. Input 3 is 0…10V only, 10 bits and no sign bit.

The analog inputs are not isolated. However, the analog inputs can be connected
in series when using current mode. Note that at 20 mA the voltage source must be
capable of providing 10V DC at the drive terminals for one drive—20V DC is
required for two drives, and 30V DC is required for three drives.

Analog Input Configuration

Once the Analog Input is converted via the A/D converter, parameters 803, 809,
and 815 [Anlg Inx Offset] can be applied. [Anlg In

x Offset] has a range of +/-

20V. Parameters 801, 807, and 813 [Anlg In

x Value] is the sum of the A/D

output and [Anlg In

x Offset]. [Anlg Inx Value] is displayed as either voltage or

mA, depending on the dip switch setting of the input.

Parameters 802, 808, and 814 [Anlg In

x Scale] scales [Anlg Inx Value] to the

range of parameters 800, 806, and 812 [Anlg In

x Data]. A destination parameter,

such as a speed reference can then be linked to [Anlg In

x Data].

Advertising