Honeywell VRX180 user manual Analog Output Prompts

Programming Function Blocks and Features

Table 4-13 Analog Output Prompts

Prompt		Range/Selections	Definition
INPUT SOURCE		Enter OFF, analog	For a control loop, this is typically set to a control output
		parameter, number as the	(LP# OV). However, it may be directed to any analog value,
		analog output source.	such as a calculated value, to retransmit the value to an
			external device.
INPUT LOW LIMIT		If the AO's input source is a	Input limits. (Variable input limits are available by
		PID control loop, specify a	programming a constant's Destination with HS or LS. See
		high value of 100 and a low	Program Constants, Section 4.16.)
		value of 0. For other input
INPUT HIGH LIMIT		sources, specify limits using
		the same units as the AO's
		input source.
OUTPUT LOW LIMIT		For CAT, enter any output	These limits scale the output to the input limits.
		range within 0-20 mA	For a CAT output a low limit of 4 and high limit of 20 will
OUTPUT HIGH LIMIT
			provide a 4-20 mA output range.
INC SLEW LIMIT		Enter OFF or 0.1 to 999.9	Limits the rate of increase or decrease of the analog output.
		units/minute (units of the	Value entered is in terms of the AO's input source, not in
		AO's input source).	terms of the output as defined by OUTPUT LOW LIMIT &
			OUTPUT HIGH LIMIT. (Variable slew limits are available by
DEC SLEW LIMIT
			programming a constant's Destination with IS or DS. See
			Program Constants, Section 4.16.)
FAILSAFE	NONE		Select failure action to occur on input signal loss. If VALUE is
		UP (Upscale)	selected, enter the value desired in FAILSAFE VALUE
		DOWN (Downscale)
		VALUE
FAILSAFE VALUE		Enter a value between Input	The value at which the output will be held for failsafe. This
		Low Limit and Input High	value is also the initial output of the loop on "cold start". If
		Limit or analog parameter or	the value is set to OFF, the output will go to 0. Value entered
		OFF.	is in terms of the AO's input source, not in terms of the output
			as defined by OUTPUT LOW LIMIT & OUTPUT HIGH LIMIT.
IMPULSE TIME		OFF or ≥ 1	The cycle time (in seconds) for On and Off time of the output.
			For example, a time of 150 seconds will cause the output to
			be on for 75 seconds and off for 75 seconds when the input
			source is at 50%. (Variable impulse time is available by
			programming a constant's Destination with IT. Program
			Constants, Section 4.16.)

102 Video Recorder – User Manual