2017-04
48
Absolute Rotary Encoder
Programmable Parameters
Total resolution
Calculation example:
■
Customer handicap: AU = 2048
■
Encoder type sign: PGA = 24 bit, PAU = 12 bit
GA = (167772216 * 2048) / 4096 >> GA = 8388608
If the total resolution of the encoder is less than the physical total resolution, the parameter total
resolution must be a multiple of the physical total resolution.
9.5.29 Object 2103h: Preset Value
The preset value is the desired position value, which should be reached at a certain physical
position of the axis. The position value is set to the desired process value by the parameter
preset. The preset value must not exceed the parameter total resolution to avoid run-time
errors.If the parameter value exceeds the total resolution of the encoder a SDO “Out of range”
message is generated.
9.5.30 Object 2104h: Limit Switch, min.
Two position values can be programmed as limit switches. By reaching this value, one bit of the
32 bit process value is set to high. Both programmed values must not exceed the parameter
total resolution to avoid run-time errors.If the parameter value exceeds the total resolution of
the encoder a SDO "Out of range" message is generated.
Bit 30 = 1 Limit Switch, minimum reached or passed under
The limit switch, Min sets Bit 30=1 with the next message telegram, if the process value
reaches or passes under the value of the limit switch:
9.5.31 Object 2105h: Limit Switch, max.
Two position values can be programmed as limit switches. By reaching this value, one bit of the
32 bit process value is set to high. Both programmed values must not exceed the parameter
total resolution to avoid run-time errors.If the parameter value exceeds the total resolution of
the encoder a SDO "Out of range" message is generated.
Bit 31 = 1 Limit Switch, maximum reached or passed under
Subindex Description Data Type Default Value Access
Restore after
Boot up
0h Preset Value Unsigned 32 0h rw yes
Ta b l e 9 . 4 2
Subindex Description Data Type Default Value Access
Restore after
Boot up
0h Limit Switch, min. Unsigned 32 0h rw yes
Ta b l e 9 . 4 3
Function Status bits Process value
Bit 31 30 29 ... 0
0 1 x ... x