Description Of The Interfaces And Functions - Siemens SIMODRIVE 611 Planning Manual

9 Important Circuit Information
9.4 Drive modules
9.4.2
Terminal 9
Terminal 663
9
9-238

Description of the interfaces and functions

A simplified 1–axis 611A feed module is shown in block diagram 9-8. This com-
prises power module, control module with standard interface and analog set-
point interface for 1FT5 servomotors.
Additional control modules with analog, digital and PROFIBUS–DP interface
––> refer to Section 5.
FR+
+ 24V enable voltage for the internal enable signals
Pulse enable / start inhibit
When terminal 663 is energized, this has a double function:
S
The pulse enable and inhibit act on a specific axis after 1 ms or on a module
for two–axis modules via an optocoupler input.
S
The start inhibit, terminal 663 open–circuit, acts with an approx. 40 ms
delay after terminal 663 is inhibited, as a result of the drop–out delay of the
start inhibit relay.
The start inhibit supports all of the safety–relevant functions, refer to
Section 9.5.
For pulse inhibit/start inhibit, the drives coast down unbraked.
The 1–axis and 2–axis 611D modules with digital and 611U with PROFIBUS
interface have, beyond this, also an axis–specific pulse enable. It is
controlled through NC/PLC interface signals via the digital drive bus or via the
PROFIBUS–DP interface. The signals act with delay, corresponding to the
particular cycle time.
Notice
The pulse inhibit using terminal 663 for control modules with Order Nos.
6SN1118–0AA11–0AA0, 6SN1118–0AD11–0AA0 and 6SN1118–0AE11–0AA0
(old FD types) only become active approx. 40 ms after actuation after the relay
drops out.
For type 6SN1118–0....–0..1, 6SN1118–0DM2.–0AA0, 6SN1121–....–...1 and
6SN1122–....–...1, (new types), the pulse inhibit becomes effective approx. 1
ms.
The different times must be observed. The older modules, with the delayed
pulse inhibit after approx. 40 ms may not be used for the circuit examples, Sec-
tion 9.7 , external speed monitoring = 7 ; armature short–circuit braking = 9 and
power contactors in the motor circuit =10.
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
05.01