Commissioning
EL500x120 Version: 3.6
• Index 0x8000:02 [}126], enable power failure bit
If the bit is set to TRUE, the last bit (LSB) in the SSI telegram is interpreted as PowerFail bit of the SSI
slave and shown in the process data.
• Index 0x8000:03 [}126], enable inhibit time
If the bit is set to TRUE, the system waits at least until the inhibit time has elapsed when the next SSI
communication starts (index 0x8010:13 [}127]), even if the next start request has already been issued
via EtherCAT or distributed clocks.
• Index 0x8000:04 [}126], enable test mode
Only for production purposes.
• Index 0x8000:06 [}126]/ Index 0x4066 [}124], SSI encoding
Dual or gray coding setting (standard).
• Index 0x8000:09 [}126]/ Index 0x4067 [}124], SSI baud rate
should be set to 125, 250, 500 kbaud (default) or 1 Mbaud.
• Index 0x8000:0F [}126]/ Index 0x4068 [}125], SSI frame type
25, 13 or variable bit width (default: 25).
• Index 0x8000:11 [}126]/ Index 0x4069 [}125], SSI frame size
Total data volume including PowerFail bit.
• Index 0x8000:12 [}126]/ Index 0x406A [}125], SSI data length
Data volume without PowerFail bit
• Index 0x8000:13 [}126]/ Index 0x406B [}125], min. inhibit time [µs]
See index 0x8000:03 [}126].
The total size of the data depends on the encoder used. It is also type-specific whether a power-fail bit or
another auxiliary bit is supported. The counter value "0x6010:11 Counter Value" is determined on the basis
of the value entered in the object "0x80n0:12 SSI data length".
A few example configurations are shown below:
Specification of the encoder Settings in the CoE of the EL500x
ST MT Error bit 8010:0F SSI frame
type
8010:11 SSI frame
size
8010:12
SSI data length
8010:02
Enable power failure
bit
13 0 0 1: Single-turn analy-
sis is active
13 13 0: Power failure bit is
not active
12 12 1 0: Multi-turn analysis
is active
25 24 1: Power failure bit is
active
12 12 0 2: Variable analysis
is active
24 24 0: Power failure bit is
not active
12 13 0 2: Variable analysis
is active
25 25 0: Power failure bit is
not active
16 16 0 2: Variable analysis
is active
32 32 0: Power failure bit is
not active
16 0 0 2: Variable analysis
is active
16 16 0: Power failure bit is
not active
13 16 1 2: Variable analysis
is active
30 29 1: Power failure bit is
active
12 12 2 2: Variable analysis
is active
26* 26* 0: Power failure bit is
not active
*) Analysis of the data and division into position and auxiliary bits must take place in the PLC
If the encoder offers more than 1 auxiliary bit, this can be done by means of suitable configuration of the
objects 0x80n0:11 SSI frame size and 0x80n0 SSI data length. The maximum size of 32 bits must be
considered here. If the parameters are of the same size, then not only the position, but also the auxiliary bits
are displayed in "Counter Value". Analysis of the data and division into position and auxiliary bits must take
place in the PLC.
If the settings are not made correctly in the CoE, or if there is an error at the inputs, this is indicated via the
status bits
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