Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 22)

4-2 FlexPak 3000 DC Drive Software Reference
4.1 Configuring the Speed Reference Source Block
The speed reference can be either automatic or manual. An automatic (auto)
reference usually comes from a device such as a
PLC or a network master. A manual
reference typically comes from a speed potentiometer or the OIM keypad. See the OIM
manual for information on auto and manual references.
If an I/O Expansion kit is installed, the selected speed reference can be overridden by
a preset speed reference if selected (terminals 59 and 60). See section 4.1.7.
Table 4.1 shows the possible control source and reference source settings. It also
shows the display for the key indicator under .
Most systems will use one primary reference source. For example, you might use a
network for your reference most of the time, but have the terminal strip reference
available for occasions when the network is not running or for troubleshooting.
The block diagram for the speed reference source is shown in figure 4.2.
!
ATTENTION: When switching from auto to manual or from manual to
auto, the drive will ramp to the reference level provided by the new source
at the rate specified by
ACCELERATION TIME (P.001) or DECELERATION TIME
(P.002). Be aware that an abrupt speed change might occur, depending
on the new reference and the rate specified in these parameters. Failure
to observe this precaution could result in bodily injury.
Table 4.1 – Effect of Control Source and Reference Settings
Control Source Reference Set Through:
OIM
Key Indicator
OIM Reference Display
(Monitor Mode) Units
KEYPAD Automatic reference from the
terminal strip as set by
AUTO
REFERENCE SELECT (P.103)
AUTO TERMBLK REF RPM ,
percentage,
or
user-defined
units
OIM MANUAL KEYPAD REF
TERMBLK
(Regulator type is
speed/voltage)
Automatic reference from the
terminal strip as set by
AUTO
REFERENCE SELECT (P.103)
AUTO TERMBLK REF
Manual reference from the
terminal strip as set by
MANUAL REF SELECT (P.106)
MANUAL
SERIAL Automatic reference from the
terminal strip as set by
AUTO
REFERENCE SELECT (P.103)
AUTO
Serial device ( PC ) MANUAL SERIAL REF
NETWORK Network AUTO (Manual
not available)
NETWORK REF From
network
TERMBLK
(Regulator type is
current/torque)
Automatic reference from the
terminal strip as set by
AUTO
REFERENCE SELECT (P.103)
AUTO (Manual
not available)
TORQUE REF MOTOR LOAD
units