Output And Input Flags

Output Flags

In all PCFL functions, bits 0...4 of the output status word define the following standard output flags:

Control Expert-IEC bits	Function
0	1 = event has occurred - pass power to the bottom output
1	1 = size of the allocated word table is too small
2	not used
3	1 = unknown PCFL function
4	1 = math event - invalid floating point or output
5...15	not used

For time-dependent PCFL functions, bits 5 and 7 are also used as follows:

Control Expert-IEC bits	Function
0	1 = event has occurred - pass power to the bottom output
1	1 = size of the allocated word table is too small
2	not used
3	1 = unknown PCFL function
4	1 = math event - invalid floating point or output
5	1 = illegal solution interval
6	not used
7	1 = initialization working
8...15	not used

Input Flags

In all PCFL functions, bits 13 and 15 of the input status word define the following standard input flags:

Control Expert-IEC bits	Function
0...12	not used
13	1 = timer override
14	not used
15	1 = function initialization complete or in progress 0 = initialize the function