Bus Interfaces - Siemens SINUMERIK 840D Description Of Functions

04.00
02.99
Activation of
analog output
Output voltage
range
5.1.6

Bus interfaces

Drive bus
Device bus
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Bit 23
DAC with SF0
DAC with SF1
DAC with SF8
DAC with SF16
LSB = Least Significant Bit
Fig. 5-3 Representation of shift factor
The screen for activating and parameterizing the DAC outputs can be reached
from the basic machine display via softkeys Start-up /
Drive/servo / DAC config.
The configuration is activated with Start. Active DACs are identified (active/inac-
tive) on the left of the screen. The output is terminated with Stop (active/inac-
tive) .
The selected signals are active after POWER ON.
The DAC operates on a voltage of between 0 V and +5 V. In this case, the 2.5 V
output voltage corresponds to the zero of the displayed signal. A two's comple-
ment is used in the digital/analog conversion, see Fig. 5-3.
+5V
U
DAC
2.5V
00
0V
Fig. 5-4 Analog output voltage range
(see SIMODRIVE 611A/D)
S
X141: Input
S
X341: Output
A bus terminator must be inserted in the last module.
(see SIMODRIVE 611A/D)
S
X151: Device bus
5 Hardware Drive Functions
5.1 Overview of interfaces
16 15
SF = Shift factor
7F ( 0111 1111
Hex
Hex
80 (1000 0000
Hex
8 7 0 (LSB)
)
d
00
Hex
FF
Hex
)
d
5-181