D-56 Programming
DC590+ Series DC Digital Drive
Using Digital Outputs with VALUE Parameters (Up-to-speed Detector)
Value parameters have values such as 100.00, or with units like 50.00%, 10.0 SECS etc.
For example, to connect Digital Output 1 to read UNFIL.SPD.FBK:
1. Set CONFIGURE I/O::CONFIGURE ENABLE to TRUE
2. Find the tag number for UNFIL.SPD.FBK either from the function block detail in this chapter, or from the Parameter Table: MMI Order -
refer to Appendix C. (It is 62).
3. Set DIGITAL OUTPUTS::DIGOUT 1 (B5)::SOURCE TAG to 62
4. Set DIGITAL OUTPUTS::DIGOUT 1 (B5)::THRESHOLD(>) to 50.00%
5. Set DIGITAL OUTPUTS::DIGOUT 1 (B5)::MODULUS to TRUE
6. Set DIGITAL OUTPUTS::DIGOUT 1 (B5)::INVERTED to FALSE
7. Set CONFIGURE I/O::CONFIGURE ENABLE to FALSE
This option is useful for generating an "up-to-speed" output. The MODULUS removes the sign from the value (so -100 becomes 100). The
THRESHOLD(>) parameter determines when the output is 24V or 0V dc (the input signal must exceed this setting for the output to go high). Set
INVERTED to TRUE to invert the result of the output.
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