Appendix
A.7 Setting a non standard SSI encoder
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
379
Parameter Description
p0422[1]
Absolute encoder linear measuring step resolution (factory setting: 100 [nm])
Sets the resolution of the absolute position for a linear absolute encoder.
p0423[1]
Absolute encoder rotary singleturn resolution (factory setting: 8192)
Sets the number of measuring steps per revolution for a rotary absolute encoder. The resolution refers to the
absolute position.
p0425[1]
Encoder, rotary zero mark distance (Factory setting: 2048)
Sets the distance in pulses between two zero marks. This information is used for zero mark monitoring.
p0426[1]
Encoder zero mark differential distance (Factory setting: 1)
Sets the differential distance with distance-coded zero marks [signal periods].
The value corresponds to jump displacement of "zero mark with interference".
p0427[1]
Encoder SSI baud rate (Factory setting: 100 [kHz])
p0428[1]
Encoder SSI monoflop time (Factory setting: 30 [µs])
Sets the minimum delay time between two data transfers of the absolute value for an SSI encoder.
p0429[1]
Encoder SSI configuration (Factory setting: 0000 0000 bin)
Bit
Signal name
1 signal
0 signal
00
Transfer code
Binary code Gray code
02
Transfer absolute value twice
Yes
No
06
Data line during the monoflop time
High level
Low level
p0430[1]
Sensor Module configuration (Factory setting: 0000 0000 0000 0000 0000 0000 0000 0000 bin)
Bit
Signal name
1 signal
0 signal
21
A one-off zero mark distance error is tolerated. In the event of a defect,
the fault F3x100/F3x101 does not appear, but alarm A3x400/A3x401
does.
Yes
No
25
Switch-off encoder voltage supply during parking
Yes
No
27
Extrapolate position values
Yes
No
A bit-wise configuration is only possible if the corresponding property is also present in r0458.
p0434[1]
Encoder SSI error bit (Factory setting: 0)
Sets the position and level of the error bit in the SSI protocol.
Value = dcba
ba Position of the error bit in the protocol (0 ... 63).
c Level (0: Low level, 1: High level).
d State of the evaluation (0: Off, 1: On with 1 error bit, 2: On with 2 error bits ... 9: On
with 9 error bits).
Example: p0434 = 1013 → The evaluation is switched in and the error
bit is at position 13 with a low level.
p0435[1]
Encoder SSI alarm bit (Factory setting: 0)
Sets the position and level of the alarm bit in the SSI protocol.
Value = dcba
ba Position of the alarm bit in the protocol (0 ... 63).
c Level (0: Low level, 1: High level).
d State of the evaluation (0: Off, 1: On).
p0435 = 1014
→ The evaluation is switched in and the alarm bit is at position 14 with a low level.
p0436[1]
Encoder SSI parity bit (Factory setting: 0)
Sets the position and parity of the parity bit in the SSI protocol.
Value = dcba
ba Position of the parity bit in the protocol (0 ... 63).
c Parity (0: even, 1: uneven).
d State of the evaluation (0: Off, 1: On).
p0436 = 1015 → The evaluation is switched in and the parity bit is at position 15 with even parity.
