Pilz PSSu E S 4AI U - Manual (Page 24)

4.2 Configuration
4 Function description
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4-8
4.2.2 Limit values
Limit values 4- ][Funktionsbeschreibung_BA_Konfig Grenzwert ST-AI allgemein
The module has range monitoring and limit value monitoring on each
channel:
 Range monitoring
– Upper limit value: 4095
D
– Lower limit value: -4095
D
– The module compares the upper and lower limit value with the dig-
ital value after the hardware calibration (values with 12 bits plus
sign) and writes the result of the comparison as follows:
– System environment A:
In the status byte (see "PSSu assignment in system environment
A")
– System environment B:
In the I/O data element "Overrange" or "Underrange" (see "PSSu
assignment in system environment B").
– The limit of the measuring range corresponds to 4095
D
.
 Limit value monitoring
– Limit value 1
– Limit value 2
– The module compares limit value 1 and limit value 2 with the digital
value after scaling (values with 15 bits plus sign) and writes the re-
sult of the comparison as follows:
– System environment A:
In the status byte (see "PSSu assignment in system environment
A")
– System environment B:
In the I/O data element "LimitValue1" or "LimitValue2" (see
"PSSu assignment in system environment B").
– The limit of the measuring range corresponds to 32 767
D
with de-
fault scaling values.
You can change the default values in the system software.
][Funktionsbeschreibung_BA_Konfig Grenzwert ST-Ein 4xU