Pilz PSSu E F ABS SSI - Manual (Page 14)

Function description
Operating Manual PSSu E F ABS SSI(­T)
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} b: The first bit is transmitted with the first rising edge from the Cl signal.
} c: The time up to the second rising edge is the period length T. 1/T is the signal fre­
quency.
} d: The last rising edge from the Cl signal ends the transfer. The encoder acknowledges
the end of the transfer with a 0 signal.
} e: The encoder can transfer data again as soon as there is a 1 signal at input D.
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
4.2 Configuration
4.2.1 Parameter
The module has the following configuration options:
Configuration
Default
value
Meaning
Transmission rate 250 kHz 62.5 kHz
100 kHz
125 kHz
250 kHz
500 kHz
1 MHz
1.5 MHz
Gray code format On On: Gray code is activated.
Off: Binary code is activated.
Fault detection within the data
frame
(1)
On On: Errors within the data frame are identified.
Off: Errors within the data frame are ignored.
Input data length 24 2 ... 32 Bit
(1) An error within the data frame means that the absolute encoder does not terminate the
serial data transfer with a zero.