Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control - Manual (Page 228)

228 Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014
Chapter 4 Commissioning
All of the Analog I/O connections are made on the ACB.
Analog Inputs
• Analog Command Input Scaling
–
Prior to commencing the reference command input scaling it is
necessary to ensure that the reference command input selection has
been configured as desired. This requires setting Reference Select [P7]
to the appropriate input source.
– Set the utilized Reference Command minimum (SpdCmd Pot(L),
SpdCmd Anlg Inp(R) and SpdCmd DPI ( D)) to the desired value.
The minimum reference command input setting on a drive without a
encoder is 6 Hz. Without encoder control, do not set the reference
command minimum parameter below 6 Hz. A control with encoder
feedback will allow a minimum speed of 1 Hz. With encoder control,
do not set the reference command minimum parameter below 1 Hz.
– Set the utilized Reference command (L, R and D) Maximum
parameters so that with full reference command inputs, the associated
Reference command Variables read the desired maximum value.
– The various reference command maximums usually have to be increased
above the desired maximum value to compensate for the loading down
of their 10 volt input rails by the attached potentiometer or isolator.
Example:
• SpdCmd Anlg Inp (4-20mA) Reference command Input Scaling
The customer 4-20 mA speed input is coming to the Current Loop Receiver on
the ACB, and they want the maximum input to represent 60 Hz.
1. Reference Command Remote Maximum (Ref Cmd R Max) should be set
for 60 Hz.
2. The Reference Select parameter should be set to “Remote 4-20 mA”.
3. Have the source supply 20 mA to the drive. This should be verified with a
multimeter connected in series with the current source. Ensure that you are
in Remote mode with the selector switch, and look at the parameter Speed
Command In, which will represent that 20 mA signal.
4. Ensure that it reads 60 Hz. If it does not, you can increase the Ref Cmd R
Max value until this parameter reads 60 Hz.
• SpdCmd DPI (Digital) Reference command Input Scaling
The maximum value for a digital reference command is 32767; the
minimum value is 0. Values that are negative or out of bounds will result in
the drive slowing down to minimum speed.
Analog Outputs
Review the electrical schematics to understand which meters or signals the user
expects out of the analog output ports on the ACB Board.