Balluff BML SGA-AEZ1-LZZZ 1 Series, User Manual

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6
DRIVE-CLiQ interface
6.1 Interface parameters
An introduction to the DRIVE-CLiQ interface
can be found in the document
Interfaces for
Magnetic Encoder System BML .
Description Value
Minimum cycle time 31.25 µs
Readiness delay 3300 ms
Position data resolution
1)
26 bits
Coarse resolution
1)
17 bits
1) The sensor head resolution is 1 µm/increment.
Tab. 6-1: Interface parameters
6.2 Status information
The sensor head can generate various alarms:
– Internal system error
– Position error: F3x137
– Temperature error (if applicable): F3x405
For alarm type F3x137 the internal error code contains
detailed information and consists of two parts:
Internal error code
Error bytes Status bytes
Tab. 6-2: Internal error code
Bits in the internal error code can be interpreted as follows:
Status bytes
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0
1)
0
1)
0
1)
0
1)
0
1)
0
1)
0
1)
1
1)
Error bytes
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
POS_INV
INCONS
NO_T
APE
DRIVE-IN
MEAS_ERR
TEMP_ERR
2)
PARAM_ERR
NOT_RDY
1) fixed value
2)
generated only for sensor head BML SGA-AEZ1-LZZZ-TU11-S284,
otherwise this bit is always 0
Tab. 6-3: Status and error bytes
Description:
–
POS_INV : Position data invalid
– INCONS : Inconsistency error (absolute track
inconsistent)
–
NO_TAPE
: No magnetic tape detected
–
DRIVE_IN
: The sensor head is in the DRIVE-IN state
(see
Operating notes
on page 16)
– MEAS_ERR : Hardware measurement error (e.g.
internal undervoltage)
– TEMP_ERR : Error in external temperature processing
(e.g. wire break or no temperature sensor connected).
This error is generated only for model
BML SGA-AEZ1-LZZZ-TU11-S284, otherwise this bit
is always 0.
–
PARAM_ERR
: Internal parameter error
–
NOT_RDY
: Sensor head is not ready, indicates a
major hardware error
Bits POS_INV, INCONS, NO_TAPE, DRIVE_IN,
MEAS_ERR, PARAM_ERR and NOT_RDY are used for
generating the position errors. Bit TEMP_ERR \is used only
for the temperature error generation (if applicable).
In case of a ( singleturn ) position error the XG1
bit is set. XG1 indicates that there is a serious
sensor error and the position is no longer valid.
BML SGA-AEZ1-LZZZ- _ _ _1- _ _ _ _
Absolute magnetic encoder system
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