Status byte, 4function description, 2 configuration – Pilz PSSu E S 4AI U User Manual
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4.2
Configuration
4
Function description
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4-14
4.2.5.2
Status byte
Status byte
4-
][BA_Betrieb ST-Ein Statusbyte
ST modules for analogue input can transfer a variety of status informa-
tion to the ST-PII (see table below for the conveyed status). The informa-
tion is transmitted using the input's status byte. Read access (R) is
configured for the input for that purpose.
Structure and contents of the status byte:
Bit number
Contents
Key
0
0
Input value above the lower limit value
1
Value below the lower limit value:
1
0
Input value below the upper limit value
1
Value above the upper limit value
2 / 3
0 0
Limit value 1 inactive
0 1
Input value greater than or equal to limit value 1
1 0
Input value less than limit value 1
1 1
Reserved
4 / 5
0 0
Limit value 2 inactive
0 1
Input value greater than limit value 2
1 0
Input value less than or equal to limit value 2
1 1
Reserved
6
0
Valid data from A/D converter
1
No valid data from A/D converter
7
0
Reserved
1
Reserved