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Page 41
Revised 7/95 DFS-1 Manual
POWERTEC Ind. Corp.©
4.4 INPUTS AND OUTPUTS SETUP
1. SET PARAMETERS #17, #18, #19, AND #20
TO SET UP ANALOG INPUT #1.
If Analog Input #1 is to be used for speed reference,
which is the default mode, and the reference is to
be 0 to +10VDC, no action is necessary to change
from the defaults. If the input is to be 4 to 20mA,
then parameter #18 must be changed. Set up
parameters #19 and #20 to conform with the speed
range set up by parameter #14.
If Analog Input #1 is not used as a speed reference,
it may be used for any other signal which may be
useful to the processor or the external program. Pre-
programmed purposes are listed on page 20, but
the uses of the analog inputs are not limited to those
items.
2. SET PARAMETERS #21, #22, #23, AND #24
TO SET UP ANALOG INPUT #2.
If Analog Input #2 is to be used for Speed Reference
Input, Analog Input #1 must be changed to
something else by changing parameter #17 to
something other than 1, and then changing
parameter #21 to 1. Parameter #22 must be set up
for the form of input (4 to 20mA is the default),
and parameters #23 and #24 set up in EGU's
conforming to parameter #14.
Analog Input #2 may be used for any analog input
the processor or program may need, either as a
predefined use (see page20) or as a General Purpose
Input.
3. SET PARAMETERS #25, #26, AND #27 TO
SET UP ANALOG OUTPUT #1.
If Analog Output #1 is to be used for a Speed Output
signal from -10 to +10VDC, then nothing needs to
be done. If not used for this purpose, it may be used
as a General Purpose Output, a Load Output, or a
communications output port by changing parameter
#25. Parameters #26 and #27 may be set up in
Engineering Units.
4. SET PARAMETERS #28, #29, AND #30 TO
SET UP ANALOG OUTPUT #2.
If Analog Output #2 is to be used for a Load Output
signal from -10 to +10VDC, then nothing needs to
be done. If not used for this purpose, it may be used
as a General Purpose Output, a Load Output, or a
communications output port by changing parameter
#28. Parameters #29 and #30 may be set up in
Engineering Units.
5. SET PARAMETERS #31 THROUGH #37 FOR
DIGITAL INPUT FUNCTIONS.
If the digital inputs as listed on page 6 are suitable,
then no changes need to be made. However, note
that any Digital Input may be used for ANY purpose
and more than one input may be used for the same
purpose (the inputs will be logically ANDed - i.e.,
they must both be present to function). The same
parameters make provisions for input sense. See
page 25.
6. SET PARAMETERS #53 FOR DEBOUNCE
TIME.
If the inputs are driven by relays or push-button,
contact bounce and/or noise could generate multiple
commands. This command sets the minimum time
(in milliseconds) that a command must be present
before it is considered valid.
7. SET PARAMETERS #38, #39, #40, AND #41
FOR DIGITAL OUTPUT FUNCTIONS.
If the outputs listed on page 7 (the defaults) are
suitable, no changes need to be made, but each
output can be reassigned as necessary (see page 26
- parameter #38) as required. The output relays can
also be assigned as normally open or normally
closed.