KEB COMBIVERT F6 Programming Manual

Interface to the encoder
© 2022 KEB Automation KG
247
SSI data format ec42 SSI data format
Index
Id-Text
Name
Function
0x282A
0x482A
ec42
SSI data format
Selection of the SSI data format
These are the setting possibilities according to the SSI specification:
ec42
SSI data format / SSI data format B
0x282A / 0x482A
Bit
Function
Value
Plaintext
Function
0…1
SSI PFB mode
0
PFB off
no Power Fail Bit
1
PFB at start of da-
taword
Power Fail Bit at the beginning of the posi-
tion value (before MSB)
2
PFB at end of da-
taword
Power Fail Bit at the end of the position
value (after LSB)
3
reserved
Reserved
2
even parity
check
0
no parity check
No parity check
4
even parity check
Even parity check
3
Data format
0
fir tree
Fir tree
8
serial right aligned
Serial right-justified
4
SSI data code
0
binary
Binary code
16
gray
Gray code
Some encoders send in addition to the position values ec40 and ec41 an error bit
(often called Power Fail Bit PFB) which is 0 in normal operation and becomes 1
when the encoder detects an error status, e.g. operating voltage too low.
When a PFB is set, an additional clock is automatically output to read this bit. I.e.
ec40 and ec41 remain unaffected.
If the encoder has a PFB and the data word is gray coded, the PFB must also be
gray coded. In contrast, this variant is not supported: Only the position value is
gray coded and then the PFB is attached.
The fir tree data format is rarely found today. Most encoders have the serial-right
data format, so this should be set first.
SSI clock frequency ec43 SSI clock freq.
Index
Id-Text
Name
Function
0x282B
0x482B
ec43
SSI clock freq.
Selection of the SSI transmission clock frequency
The following frequencies can be selected:
ec43
SSI clock freq.
0x282B / 0x482B
Value
Clock frequency
0
100 kHz (156 kHz)
1
500 kHz
2
1 MHz (833 kHz)
The values in brackets apply if Endat is adjusted on the other encoder channel.

KEB COMBIVERT F6 Specifications

General

Brand	KEB
Model	COMBIVERT F6
Category	Controller
Language	English