Nidec SI-Encoder V2 User Manual page 24

Safety information Introduction
Sankyo
Bit Meaning
0 Over-speed
1 Sensor error
2 Position error
3 Memory error
4 Encoder temperature
5 Multi-turn error
6 Low battery
Battery alarm. The battery is below the allowed threshold while the encoder
7
is powered up.
Bits 0 to 7 are being updated. If this bit is zero then Bits 0 to 7 show the
8
value the last time the data was read from the encoder.
mm.074
Additional Configuration
Minimum 0
Decimal places 0
Type 32 Bit User Save
This parameter provides additional configuration not covered by other set up parameters.
Device Type (mm.038): AB
This parameter has no effect.
Device Type (mm.038): SMART-ABS, Sankyo
This parameter includes 2 fields as shown below. The option module attempts to set this parameter automatically on power-up and encoder
initialisation if Auto-configuration Select (mm.041) > 0.
Decimal Digits 2
Description Single Turn
Default 0
Position Padding
The encoder position within a turn from the encoder is a 24 bit value, however the actual data may not completely fill all 24 bits. This padding value
gives the number of left (most significant) padding bits between 0 and 23 (if the value is larger than 23 it is assumed to be 1). The default value of 01
gives one padding bit as the most significant bit.
Single Turn
If the encoder is a single turn device then this field should be set to 1.
Encoder Initialisation Mode
mm.075
Minimum 0
Decimal places 0
Type 8 Bit Volatile
Value Text
0 No Error Reset
1 Error Reset Only
2 Multi-turn Reset
3 Position Reset
Device Type (mm.038): AB
This parameter has no effect.
Device Type (mm.038): SMART-ABS, Sankyo
Errors detected by the encoder are shown in Position Feedback Signals (mm.070). Most of these errors are latched and require a special reset to
remove them. It is important that these errors are not simply removed by a normal drive reset without further user intervention because the multi-turn
position may be incorrect. To remove the detected error indication from within the encoder and clear the trip this parameter must be set to either 1 or
2 and the drive should be reset to clear the trip and re-initialise the encoder. Alternatively, this parameter can be set to 1 or 2 and the encoder can be
initialised with Initialise Position Feedback Devices (03.075), but this will only internally reset the encoder and initialise it, and not clear the trip. The
type of reset performed is given in the table below.
24
Mechanical Installation Electrical Installation
Maximum 123
Units
Display format Standard
1-0
Position Padding
01
Maximum 3
Units
Display format Standard
Description
Internal encoder errors are not reset.
Internal encoder errors are reset.
Internal encoders errors and the multi-turn position are reset.
No errors are reset, but the position within one turn is reset.
Getting Started Parameters
Trip Encoder Initialisation Mode (mm.075) value
number required to reset encoder trip indication
1 or 2
107
1 or 2
118
1 or 2
109
1 or 2
119
111
2
112
2
113
Default 1
Update rate Background read
Coding RW
Default
Update rate Background read
Coding RW, TE, ND, NC, PT
Diagnostics
SI-Encoder V2 User Guide