Pilz PSSu E S 4DI - Manual (Page 13)

Function description
Operating Manual PSSu E S 4DI(­T)
21340­EN­06 13
4.1.2 Integrated protection mechanisms
When the PSSu E F PS1(­T) is used to supply the system, the module supply is buffered
for 20 ms if the supply voltage is interrupted.
The module detects the following errors:
} Start­up error
} Configuration error
} ST communication error
} Bus termination error
4.1.3 Reaction times
Information on the reaction times of the inputs can be found in the PSSuniversal System
Description.
4.2 Configuration
4.2.1 PSSu assignment in system environment A
It is not necessary to configure ST inputs in the PSSuniversal Configurator on the
PSS WIN­PRO system software, but ST modules can be selected and displayed.
The ST process image can be optimised by combining adjacent bits of the same type into
bytes.
Further information on configuration is available in the PSSuniversal Configurator's online
help.
4.2.1.1 Addresses in the process image
The module occupies 4 consecutive bit addresses in the process image.
Configuration SafetyBUS p Standard bus system
FS­PII ST­PII ST­PIO
None ­ ­ ­ 4 Bit ­ ­ ­
4.2.2 PSSu assignment in system environment B
Data access is via pre­defined I/O data types:
I/O data name I/O data type I/O data element Meaning
I0(11), I1(21), I2(14),
I3(24) ST_I_DI Data: BOOL Input data I0 ... I3