ABB DCS550 Series, Manual

Page: 115 / 316

115
AP
3ADW000379R0501 DCS550 Manual e e
Option 2:
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User constants 85.01 to 85.10 are reserved for AP. Use them for custom setting. Use parameters 19.01 to
19.12 in the same way, but they are not stored in the flash.
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Connect the user constant to a block as usual by the input selection parameter.
It is possible to change user constants while AP is running. They may have values from -32767 to 32767.
Parameter value as a boolean input
How the block handles the input
The block:
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reads the selected value as an integer,
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uses the bit defined by the bit field as the boolean input and
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interprets bit value 1 as true and 0 as false.
Example:
The figure below shows the value of Block1In3 (84.07) when the input is connected to DI2. All digital inputs
are available in DI StatWord (8.05). Bit 0 corresponds to DI1 and bit 1 to DI2.
Note:
The parameter selected as an input should have a packed boolean value (binary data word).
Constant as a boolean input
How to set and connect the input
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Scroll to the input selection parameter of the block and switch to edit mode (Enter).
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If boolean value true is needed, set the constant to 1. If boolean value false is needed, set to 0.
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Accept by Enter.
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Scroll to attribute parameter (BlockxAttrib).
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Set the bit for constant attribute of this input in BlockxAttrib parameter.
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Accept by Enter.