Lenze EPM−T9XX Modular system - Manual (Page 492)

Parameterising SSI interface
Parameter data
13
Parameter setting via PROFIBUS−DP
13.3
13.3.1
L
13.3−2 EDSPM−TXXX−9.0−11/2009
The parameter data is 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.
)
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