Rcp Function Block - Honeywell UMC800 Reference Manual

Function Blocks

2.53 RCP Function Block

Description
The RCP label stands for Recipe Selector. This block is part of the Setpoint Program category. It looks
like this graphically on the Control Builder.
Function
Used to initiate loading of recipe values into a chosen set of controller variables. Inputs include recipe number and load
Loads numbered RECIPE (NUM) when digital signal (LD) is ON into the various blocks of the
command.
controller.
•If LD = OFF to ON, then: Recipe numbered (NUM) is loaded in place of the current set of
variable values.
Input
NUM = Recipe number (1-50).
LD = Load recipe - OFF to ON will load the recipe.
Usage Tip
The recipe is loaded at the time of block execution. If using multiple RECIPE blocks, they may
counteract. Also, use the lowest execution numbers.
Block Properties
Double click on the function block to access the function block properties dialog box.
Block Order (Read Only)
You can change the assigned execution order number by selecting "Execution Order" in the "Configure"
menu and arrange the order to suit your control strategy.
ATTENTION
The recipe is loaded while the LD signal is on. It is not a one time load, it is a continuous load while the LD
signal is on.
If the OI operator attempts to change a variable value (done by means of the Variable Edit display on the
OI), the operator's changes will immediately be overwritten by the loading recipe since it also contains the
variable.
To correct this problem, configure a one-shot trigger signal between LD and its signal. This will cause LD
to go on for one scan cycle instead of staying on.
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