6. Series 8 I/O Configuration
6.10. Defining Digital Output Channel Blocks
R500 Series 8 I/O User's Guide 195
April 2017 Honeywell
Determining Status Output type
The status output type can be controlled from a:
device control block output,
logic block output, or
RegCtl block (that has been configured for the PosProp algorithm)
as determined by the parameter connection.
Determining Pulse Width Modulated (PWM) Output type
The PWM output type can receive its input from a Experion regulatory block through a
user-configured output connection. The length of the pulse is derived from the OP
parameter provided by the regulatory block. Since the OP is in percent, the percent value
becomes the percent on-time for the pulse with period (1.0 to 120.0 seconds) is specified
by the PERIOD parameter, as illustrated below.
The output direction of the output signal can be configured to be direct or reverse acting
by using the OPTDIR parameter.
The pulse on-time for direct and reverse acting outputs is calculated as follows:
If the value of OP is less than 0%, it is clamped to 0%; an OP with a value greater than
100% is clamped to 100%.
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