Siemens SINUMERIK 840Di Function Manual page 91

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