D-52 Programming
DC590+ Series DC Digital Drive
Digital Input Examples
Using Digital Inputs with LOGIC Parameters
Logic parameters have values of 1/0: TRUE/FALSE, ON/OFF, ENABLED/DISABLED etc.
For example, the default connections in the drive allow the Digital Inputs to switch LOGIC parameters. These are the connections from:
• Terminal C6 to Tag 90 (BIPOLAR CLAMPS)
• Terminal C7 to Tag 118 (RAMP HOLD)
• Terminal C8 to Tag 119 (I DMD. ISOLATE)
In each case, the state of the terminal (24V or 0V) switches the destination parameter by sending a 1 or 0.
The format for the VALUE FOR TRUE and VALUE FOR FALSE parameters is in percent, thus 0.00% = 0 and 0.01% (or any other non-zero positive
number) = 1.
Inverting the Input Signal
The default setting is for VALUE FOR TRUE to be 0.01% and VALUE FOR FALSE to be 0.00%. Inverting the digital input is therefore simple; set
VALUE FOR TRUE to 0.00% and VALUE FOR FALSE to 0.01% (or any other non-zero number).
To do this:
1. Set CONFIGURE I/O::CONFIGURE ENABLE to TRUE
2. Set DIGIN 1 (C6)::VALUE FOR TRUE to 0.00%
3. Set VALUE FOR FALSE to 0.01%
4. Reset CONFIGURE I/O::CONFIGURE ENABLE to FALSE
Digital Input 1 now sends a 0 when the input signal is TRUE, and 1 when it is FALSE.
Using Digital Inputs with VALUE Parameters
Value parameters have values such as 100.00, or with units like 50.00%, 10.0 SECS etc.
You can use a Digital Input to send two fixed values to a VALUE parameter depending upon the state of the input terminal, 24V or 0V. You set the
two fixed values you require in the VALUE FOR TRUE and VALUE FOR FALSE parameters.
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