PowerTec DFS-1 manual Inputs and Outputs Setup

4.4INPUTS 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.

Revised 7/95	DFS-1 Manual	Page 41
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