Pilz PSS SB NOT, Basic license - Manual (Page 39)

5-11 Modular Block System: Emergency Stop Circuits
Temporary flag range in MBS blocks
Internally, MBS blocks use the flags in the range M 64.00 ... M69.31 as
temporary flags.
NOTICE
We recommend the following:
• Do not use flags from the temporary flag range for your own applications.
Malfunctions may occur if you use the temporary flag range M64.00 ...
M69.31 for your own applications.
• If it is absolutely necessary to use this flag range, under no
circumstances should you use the flags:
- in alarm OBs
- as input parameters for standard function blocks
- as output parameters for standard function blocks
- as global parameters
Output parameter FG/ENBL
Many standard function blocks have an enable output FG/ENBL. This
output parameter indicates the enable status of a standard function block.
The enable status results from the standard function block’s check of the
inputs.
FG / ENBL = 1: No error found,
function is enabled
FG / ENBL = 0: An error has been found,
function is not enabled.