Circuit Example 611 Digital With Sinumerik 840D - Siemens SIMODRIVE 611 Planning Manual

9 Important Circuit Information
9.8 Information on applications with 611 digital/611 universal
9.8.1
9.8.2
9
Control with
SINUMERIK 840D
9-282

Circuit example 611 digital with SINUMERIK 840D

A circuit example SIMODRIVE 611 digital and SINUMERIK 840D with the drive–
related control for a machine/plant, based on the circuit examples in Section
9-24 with 611A, is shown as block diagram in Fig. 9.7.
Circuits with 611 digital
The 611 digital control modules have a digital setpoint and position actual value
interface to the 840D, 810D or 840C MC controls. The modules are available as
1–axis or 2–axis modules with Performance of Standard control.
Furthermore, the modules differ by the connection type:
S
Incremental encoder as motor encoder (indirect measuring system) or
S
Incremental encoder as motor encoder (indirect measuring system) and
connection for direct measuring system encoders
An essential difference between 611 digital and 611 analog controls is, among
other things that the motor encoder (incremental encoder cos/sin 1 Vpp) at the
drive motors, in addition to the tachometer and rotor position signals (only for
synchronous motors) also transfers position actual value signals to the measu-
ring system input of the 611D. These signals are fed to the position controllers
in the NC control via the digital drive bus where they can be processed for indi-
rect position actual value/position sensing of the drive.
Description of the interfaces of the 611 digital control module ––> refer to Sec-
tion 5.
All of the communications of the NC control to the 611D drive modules is reali-
zed via digital drive bus. The axis–specific controller and pulse enable signals
as well as the operating and monitoring messages are realized via NC/PLC
interface signals on the digital drive bus.
The hard–wired terminal 65 axis–specific control enable is not available for the
611D modules. Terminal 663, pulse enable/start inhibit is available on a mo-
dule–for–module basis for the 611D modules as for the 611 A modules. The
axis–specific pulse enable signals via the drive bus are AND'ed with the signal
status at terminal 663.
The NC control with the integrated PLC–CPU SIMATIC S7–300 is accommoda-
ted in a 50 mm–wide housing, compatible to the SIMODRIVE drive modules.
The control is integrated in the SIMODRIVE 611D drive group and can be ex-
panded by up to 31 axes. It is located between the NE module and the first
drive module in the drive group. The power supply for the internal control vol-
tage is derived from the NE module power supply via the equipment bus. The
NC ready signal acts on the ready signal, terminals 72–74, of the NE module
via the equipment bus.
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
05.01