Runtime error

Status word

The following messages are displayed in the Status word:

Bit	Value in Dec.	Value in Hex.	ENO Status	Description
Bit 0 = 1	1	0x0001	False	Error in a floating point value calculation
Bit 1 = 1	2	0x0002	False	Recording of an invalid value on one of the floating point value inputs
Bit 2 = 1	4	0x0004	False	Division by zero during a floating point value calculation
Bit 3 = 1	8	0x0008	False	Capacity overflow for a calculation with floating point values
Bit 4 = 1	16	0x0010	True	One of the following variables is negative: inc_rate, dec_rate. For calculation, the function block uses the value 0.

For the list of other possible floating point error codes, see Common Floating Point Errors.

Error message

An error is signaled if a non floating value is recorded or if there is a problem with a floating point calculation. In this case the outputs SP and DONE remain unchanged.

NOTE: For a list of all block error codes and values, see Setpoint Management.

Warning

A warning appears in the following cases:

The parameter inc_rate is negative: the function block uses the value 0 instead of the faulty value of inc_rate.
The parameter dec_rate is negative: the function block uses the value 0 instead of the faulty value of dec_rate.