Commissioning
EL500x 135Version: 3.6
Fig.146: CoE settings and process data
SSI settings
• Index 0x8000:01 [}137], disable frame error
If the bit is set to TRUE, data errors such as invalid telegram size are no longer shown in the Data error
process record.
• Index 0x8000:02 [}137], enable power failure bit
If the bit is set to TRUE, the last bit in the telegram is interpreted as PowerFail bit and shown in the
process data.
• Index 0x8000:05 [}137], Check SSI frame size
The received telegram size is checked against the setting of index 0x8000:11/12 and shown in Data
error if applicable
• Index 0x8000:06 [}137], SSI-encoding
Dual or gray coding setting (standard).
• Index 0x8000:0F [}137], SSI-frame type
25, 13 or variable bit width (standard: 25).
• Index 0x8000:11 [}137], SSI-frame size
Total data volume including PowerFail bit.
• Index 0x8000:12 [}137], SSI-data length
Data volume without PowerFail bit
SSI communication sequence
The SSI master starts pulsing on the data line with a fixed cycle into the shift register of the SSI slave. The
slave generally "pushes back" data with a width of 25 bits on the data line. An SSI encoder should determine
its position with the first falling edge of the signal at the Clock input ("latching"), which is then transferred.
The last data bit can be a PowerFail bit, i.e. the slave signals a power failure.
The number of bit changes equals the clock frequency, i.e. the maximum data transfer rate for a 1 MHz cycle
is 1 Mbit/s.
The EL5001-0011 cannot be operated with SingleEnded signals.
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