SEW-Eurodrive MOVISAFE DCS B Series

Manual – MOVIDRIVE® MDX61B Safety Module MOVISAFE® DCS..B Option
67
5
Connecting the position and velocity sensors
Installation
Master/slave mode
with SSI absolute
encoders
• SSI absolute encoders can be operated on the DCS..B option in master or slave
mode.
In master mode, the encoder is operated independently on the DCS..B option. In
slave mode, only the encoder data are picked off via split cable for further processing
(see chapter "Wiring diagrams for encoders and prefabricated cables").
• In master/slave mode, it is essential that encoder 1 is operated in master mode when
using two absolute encoders on the DCS..B option.
Encoder values of
MOVIDRIVE
®
B
• You can make encoders connected to MOVIDRIVE
®
B accessible to the DCS..B
option via the backplane bus of MOVIDRIVE
®
B.
• If an incremental value of MOVIDRIVE
®
B is to be used via the backplane bus, this
has to be configured as "Encoder 1" in the software interface of MOVISAFE
®
Assist/Config. In MOVIDRIVE
®
B, parameter P557 DCS actual position source must
be set to "Motor encoder (X15)".
• If an absolute value of MOVIDRIVE
®
B is to be used via the backplane bus, this has
to be configured as "Encoder 2" in the software interface of MOVISAFE
®
Assist/
Config. In MOVIDRIVE
®
B, parameter P557 DCS actual position source must be set
to "Absolute encoder (X62)".
5.10.4 Technical requirements on suitable encoder types
SSI absolute encoder:
– SSI data interface with constant data length of 24 bits
– Binary or Gray code data format
– Signal level to RS422
– If the measuring channel is operated in master mode, the clock rate for "encoder 1"
(X84) is approximately 100 kHz and for "encoder 2" (X85) approximately 80 kHz.
– If the measuring channel is operated in slave mode, the maximum external clock rate
is 150 kHz.
– The pulse break between the clock pulse trains must be greater than 30 μs and less
than 6 ms.
TTL incremental encoder:
– Signal level to RS422
– Measuring signal A/B track with 90 degree phase difference
– Maximum frequency of the input pulses: 200 kHz
SIN/COS encoder:
–AC1V
pp
– Measuring signal A/B track with 90 degree phase difference
– Maximum frequency of input pulses: 200 kHz
Encoder values of MOVIDRIVE
®
B via backplane bus:
– Both incremental and absolute encoder information can be sent via the backplane
bus of MOVIDRIVE
®
B.
– The incremental encoder values of MOVIDRIVE
®
B that are sent to the DCS..B
option via backplane bus of MOVIDRIVE
®
B (backplane bus inc.) can be used as
"encoder 1".