CK_PRIO: Relapse check priority against the preference priority

Block CK_PRIO (FB884) display the increase or reduction in priority of an XFB block against a reference priority.

Functioning

The block compare the present priority [PrPrio] with the reference priority [RefPrio] and the previous reference priority [PrvRefPrio].

If the reference priority [RefPrio] is reached, the display at the output indicates whether this was the result of an increase or decrease in priority.

	IF	THEN
Increase in priority	The priority [PrPrio] increased in the present cycle and reached [RefPrio].	[FmHiPrio] = 1
Reduction to priority	The priority [PrPrio] decreased in present cycle and reached [RefPrio].	[FmLoPrio] = 1
Priority change from the previous reference priority	The priority [PrPrio] changed in present cycle from [PrVRefPrio] to [RefPrio].	[FmPrvPrio] = 1

Notes:

A reduction in value to [PrPrio] means a higher priority.
The evaluation is only displayed for one cycle.

Input values

Pin	Description	Data type	Standard value	Engineering unit or text group	Min.	Max.
PrPrio	Present priority.	INT	16	BA present priority for SystemOne	0	17
RefPrio	Reference priority	INT	16	BA present priority for SystemOne	0	17
PrvRefPrio	Previous reference priority	INT	16	BA present priority for SystemOne	0	17

Output values

Pin	Description	Data type	Standard value	Engineering unit or text group	Min.	Max.
FmHiPrio	From higher priority	BOOL	0	False, True
FmLoPrio	From lower priority	BOOL	0	False, True
FmPrvPrio	From previous priority	BOOL	0	False, True

Process response

Standard (see General rules and information).

Troubleshooting

Standard (see General rules and information).