Detailed Description
2.2 Encoder monitoring
Axis Monitoring, Protection Zones (A3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-19
The type of zero mark monitoring depends on the type of encoder used:
MD30240 $MA_ENC_TYPE = <
encoder type
>
Encoder
type
Meaning
0 Simulation
1 Raw signal generators (voltage, current, EXE etc.) -> High resolution
2 Rectangular signal encoder (standard, no. of PPRs quadrupled)
3 Encoder for stepper motor
4 Absolute value encoder
- SIMODRIVE 611D: absolute encoder with EnDat interface only
- PROFIBUS drives: No restriction
5 Encoder with SSI interface
The following table shows the corresponding context:
MD36310
Encoder
type
Function
0 - No zero mark monitoring.
100 - No zero mark monitoring and suppress encoder alarms.
0 No zero mark monitoring.
3 No zero mark monitoring.
1
2
Number of detected changes on which an alarm is to be output. Every
time the encoder is switched on, counting starts at "0".
4 Permissible deviation between the absolute and incremental encoder
track in 1/2 rough lines. It is generally sufficient to enter a 1/2 rough line. If
this is exceeded, alarm 20510 is triggered. (See below: Boundary
conditions)
> 0
5 No zero mark monitoring.
Power-ON-Alarm 25000 instead of Reset-Alarm 20510.
Effect
Active measuring system
The following occurs when the zero mark monitoring is initiated:
• Alarm: "25020 Axis <
Axis identifier
> Zero mark monitoring of active encoder"
• The affected axis is stopped via the configured braking ramp in follow-up mode:
MD36610 $MA_AX_EMERGENCY_STOP_TIME
(Time for braking ramp when an error occurs)
• If the axis/spindle is involved in interpolation with other axes/spindles, these are brought
to a standstill with rapid stop (set velocity = 0).
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