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Table 7-6 Encoder simulation source
Encoder Simulation
Mode (1x.088)
Hardware (0)
Lines Per Rev (1) or
Ratio (2)
SSI (3)
Although Encoder Simulation Source (1x.085) is not a standard source parameter in common with
other sources the actual source is only changed on a drive reset.
See section 6.3 Encoder Simulation Output Set-up on page 41 for further information.
1x.086
Minimum
Default
Type
Display Format
Coding
Value
0
None
1
Full
2
No Marker Pulse
The availability of the encoder simulation output on the 15 way connector on the drive is dependent
on the type of feedback device selected with P1 Device Type (1x.038). Priority is as follows from
highest to lowest priority:
1. P1 position feedback interface
2. Encoder simulation output
3. P2 position feedback interface
SI-Universal Encoder User Guide
Issue: 2
Encoder Simulation Source (1x.085) must be set to (1x.029) for the
output to be enabled and the position from the P1 position feedback
interface on the module (P1 Position (1x.029)) to be used as the
source.
The P1 input of the drive can be used as the encoder simulation source
in hardware mode by setting Encoder Simulation Source (1x.085) to
3.029. If scaling is to be used, then P1 Device Type (1x.038) must be
set to Drive P1 which will also disable the P1 position interface on the
module. See P1 Device Type (1x.038) for more information.
If Encoder Simulation Source (1x.085) = 1x.029 (i.e. P1 Position
(1x.029) is the source) then P1 Position (1x.029) and P1 Fine Position
(1x.030) are combined as a 16 bit value with 16 bit fractional part as the
input to the encoder simulation system, which gives additional output
resolution if the encoder simulation ratio is greater than unity.
The encoder simulation system is intended to be used with a 16 bit
source parameter. If the source of the encoder simulation system is not
a 16 bit parameter then the drive uses the source parameter as follows:
•
1 bit parameter: Zero extended
•
8 bit parameter: Sign extended if BU attribute is zero (signed),
otherwise zero extended (unsigned)
•
32 bit parameter: Only the least significant word is used.
For SSI output mode the number of bits included in the output can be
selected (see Encoder Simulation Mode (1x.088) for details).
Encoder Simulation Status
0
8 Bit Volatile
None
RO, Txt, ND, NC, PT
Text
Description
Maximum
2
Units
Update Rate
Background write
Decimal Places
0
85
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