simoreg 6ra70 dc master

■ Safety shutdown
(E-STOP)
The task of the E-STOP function
is to open the relay contacts
(terminals 109/110) for energizing
the main contactor within
about 15 ms, independently of
semiconductor components
and the functional status of the
microprocessor board (basic
electronics). If the basic electronics
are operating correctly,
the closed-loop control outputs
an I = 0 command to de-energize
the main contactor. When
an E-STOP command is given,
the drive coasts to a standstill.
The E-STOP function can be
triggered by one of the following
methods:
Switch operation: E-STOP is
activated when the switch between
terminals 105 and 106
opens.
Pushbutton operation: Opening
an NC contact between
terminals 106 and 107 triggers
the E-STOP function and
stores the shutdown operation.
Closing an NO contact
between terminals 106 and
108 resets the function.
When the E-STOP function is
reset, the drive switches to the
“Starting lockout” state. This
status needs to be acknowledged
through activation of the
“Shutdown” function, e.g. by
opening terminal 37.
Note: The E-STOP function
is not an EMERGENCY STOP
function according to
EN 60204-1.
■ Serial interfaces
The following serial interfaces
are available:
One serial interface on connector
X300 on the PMU for a
USS protocol to the RS 232 or
RS 485 standard. For connection
of optional OP1S operator
panel or for PC-based
DriveMonitor.
One serial interface at terminals
of the basic electronics
board, two-wire or four-wire
RS485 for USS protocol or
peer-to-peer connection.
One serial interface at terminals
of the terminal expansion
board (option), two-wire or
four-wire RS485 for USS
protocol or peer-to-peer connection.
PROFIBUS-DP on a supplementary
card (option).
SIMOLINK ® on a supplementary
card (optional) with fiberoptic
connection.
Physical characteristics of
interfaces
RS 232: ± 12 V interface for
point-to-point operation.
RS 485: 5 V normal mode interface,
noise-proof, for an additional
bus connection with a
maximum of 31 bus nodes.
SIMOREG 6RA70 DC MASTER
System Overview
USS protocol
Disclosed SIEMENS protocol,
easy to program on external
systems, e.g. on a PC, any master
interfaces can be used. The
drives operate as slaves on a
master. The drives are selected
via a slave number.
The following data can be exchanged
via the USS protocol:
PKW data for writing and reading
parameters.
PZD data (process data) such
as control words, setpoints,
status words, actual values.
Connector numbers are entered
in parameters to select the
transmit data (actual values),
the receive data (setpoints) represent
connector numbers that
can be programmed to act at
any intervention points.
Design and mode of operation
Peer-to-peer protocol
The peer-to-peer protocol is
used to link one converter to another.
With this mode, data are
exchanged between converters,
e.g. to build a setpoint cascade,
via a serial interface.
Since a serial interface is employed
as a four-wire line, it is
possible to receive data from
the upstream converter, condition
them (e.g. through multiplicative
weighting) and then send
them to the downstream converter.
Only one serial interface
is used for the whole operation.
The following data can be exchanged
between converters:
Transmission of control words
and actual values.
Receipt of status words and
setpoints.
Up to five data words are transmitted
in each direction. Data
are exchanged on the basis of
connector numbers and intervention
points.
The serial interfaces can be operated
simultaneously. For example,
the first interface can be
used as an automation link (USS
protocol) for open-loop control,
diagnostics and specification of
the master setpoint. A second
interface operates in conjunction
with the peer-to-peer protocol
to act as a setpoint cascade.
Siemens DA 21.1 · 2006 2/11
2