Honeywell VRX180 Program Constants, Constant Prompts, Value, Input High Limit Destination

Programming Function Blocks and Features

4.16 Program Constants

Constants can be programmed here and their values edited Online. Select a constant to program. Table 4-52 describes the Constant prompts. See Table 4-2 for additional prompts.

Table 4-52 Constant Prompts

Prompt	Range/Selections		Definition
VALUE	OFF, analog		If a number, the Constant may be altered Online from the Data
	parameter, number		Entry menu. If a parameter, this parameter can be directed by
			DESTINATION to override certain programmed values.
INPUT LOW LIMIT	OFF or number		Display limits (for when viewing Constant on trend display or on
			bar displays).
INPUT HIGH LIMIT
DESTINATION			See Destination defined on next page.
	NONE		No destination
	LPn GN	LOOPn GAIN1
	LPn PB	LOOPn PROP. BAND #1
	LPn RS	LOOPn RESET #1
	LPn RA	LOOPn RATE #1
	LPn RB	LOOPn RATIO BIAS
	LPn IS		LOOPn SP INC SLEW LIMIT
	LPn DS	LOOPn SP DEC SLEW LIMIT
	LPn HS	LOOPn SP HIGH LIMIT
	LPn LS		LOOPn SP LOW LIMIT
	AOn IS	AOn INC SLEW LIMIT
	AOn DS		AOn DEC SLEW LIMIT
	AOn HS		AOn IN HIGH LIMIT
	AOn LS	AOn IN LOW LIMIT
	AOn IT	AOn IMPULSE TIME (type DAT)
COMM CONSTANT	Yes/No	When enabled, any constant writes via modbus communication
			will only be written to the RAM copy of the configuration and not
			to the non volatile flash copy.
			When the unit cold starts, the constant values set up to be
			periodically written via communications will revert back to any
			value that was manually set via the local HMI. The local HMI will
			always write the constant value to the RAM and non volatile flash
			which will be preserved across a power cycle.

Video Recorder – User Manual 147