Siemens SIMOVERT MASTERDRIVES Manual page 715

05.2006
Connection of the
rough pulse
Siemens AG 6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
(A) On activation of the mode 2 command, the axis is started with jog
forwards or jog backwards. The drive accelerates to the home
position approach velocity MD7. The user must ensure that the
home position is crossed in the correct direction. The homing
direction is defined in MD5 and must match the setting on the
position sensing system (motor encoder P183). The limit switches
are not evaluated.
(B) When the rough pulse signal is detected, the drive decelerates to
the home position reducing velocity MD6.
(C) When the next rotor zero is detected, the drive is brought to a
standstill. The axis referenced checkback signal (ARFD) is output.
(D) The drive realigns itself at the home position.
The rough pulse must be wired both via parameter P178 (for motor
encoders) to the position sensing system and to the positioning system.
This is performed via one of the digital inputs of the positioning system,
connected to the digital inputs with parameter U536. The function of the
digital input is defined with MD45.
Example 1: Motor encoder with resolver, rough pulse connected to
digital input 4 (terminal X101.6, see [90.5].
Par. Value
P178 16
U536.4 16
U501.45 xx7xxx
Example 2: Machine encoder with incremental encoder, rough pulse
connected to rough pulse 1 of pulse encoder evaluation for
machine encoder (function diagram 255.3, connector
X400/64).
Par. Value
U536.4 66
U501.45 xx7xxx
Compendium Motion Control
Meaning
Rough pulse for position sensing from digital input
terminal 6
Digital input I4 for positioning from digital input
terminal 6
Function of digital input I4 for positioning input is
proximity switch for homing.
MD45
Meaning
Digital input 4 of positioning system from rough pulse
1 of pulse encoder evaluation for external machine
encoder
Function of high-speed input is proximity switch for
homing
Technology Option F01
[330.5]
[813.1]
[813.4]
[255]
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