Lenze EPM−T9XX Modular system - Manual (Page 378)

Parameterising SSI interface
Input data assignment via index
12
Parameter setting via system bus (CAN) / CANopen
12.5
12.5.2
L
12.5−2 EDSPM−TXXX−9.0−11/2009
The parameter data are assigned as follows:
Byte Assignment Lenze setting
0 Reserved
1 Reserved
2 Baud rate 1) 00
h
= 300 kBaud 00
h
01
h
= 100 kBaud
02
h
= 300 kBaud
03
h
= 600 kBaud
04
h ...
FF
h
= 300 kBaud
3 Coding 2) Bit 0 0 Binary code 00
h
1 Gray Code
Bit 1 Reserved
Hold function 3) Bit 2 0 Deactivate
1 Activate
Bits 3 ...
7 Reserved
1) The encoder connected to the SSI interface transmits serial data. Therefore the encoder receives a clock pulse
from the SSI interface. The clock pulse is determined by you.
2) If the encoder transmits the data in Gray code to the SSI interface, activate the Gray code to ensure that the data
will be transferred in binary code from the gateway.
3) If the hold function is activated, the current encoder value will be frozen as soon as +24 V are applied to the input
I/O.0 +24 V. For this, the switching function must be parameterised for the input I/O.0 (I4101
h
or I4103
h
).
)
Note!
The baud rate depends on the cable length and the SSI encoder.
The cables must be twisted and shielded in pairs. The following
data serve as a guideline:
Cable length Baud rate
< 400 m 100 kBaud
< 100 m 300 kBaud
< 50 m 600 kBaud
12.5.2 Input data assignment via index
The input data of the SSI interface can be parameterised via indices. The indices
required depend on the mapping (I4104
h
).
)
Note!
Settings under indices I4101
h
and I4103
h
can only be reset by
disconnecting the supply voltage.