Installing the Control System
2.3 Connecting the individual components
2-25
SINUMERIK 802S
6FC5 597–2AA00–0BP2 (01.02)
Signals
One clock, direction and enable signal each is output per axis both as a true and a negated
signal.
S PULS (CLOCK)
The clock pulses control the motor. With each rising pulse edge, the motor carries out a
single step.
Thus, the angle of rotation, i.e. the distance to be traversed, is determined by the number
of output pulses.
The rotational speed, i.e. the traversing speed, is determined by the pulse frequency.
S DIR (DIRECTION)
The direction of rotation of the motor is determined by the signal level.
Signal ON: ”CCW rotation”
Signal OFF: ”CW rotation”
S EN (ENABLE)
This signal is activated by the control system when the cyclic control mode is initiated.
Signal ON: Secondary power control enabled
Signal OFF: Motor dead
No readiness
Signal parameters
All signals for stepper drives are output to the RS422 standard via differential signal cable
drivers.
All outputs are eletcronically protected against short–circuit and thermal overload.
Table 2-4 Electrical parameters of the signal outputs for stepper drives
Parameter
Min. Max. Unit at
Differential output voltage V
OD
2 V
R
L
= 100 Ω
3.7 V I
O
= -20 mA
Output voltage ”high” V
OH
4.5 V I
O
= -100 µA
Output voltage ”low” V
OL
1 V I
O
= 20 mA
Load resistance R
L
55 Ω
Output current I
O
"60 mA
Pulse frequency f
P
250 kHz
Cable length: max. 50 m
(with asymmetric transfer 10 m)
2.3.3 Connecting the spindle drive (X3)
Pin assignment of the connector on the ENC side
Spindle drive interface
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