Mitsubishi Electric ME-RTU Bedienungsanleitung Seite 264

Serial Connections
1.2 Serial Connections
Item
1. Port Name:
Name used to reference the commu-
nication port defined in this section.
2. Serial Connection Parameters:
3. Baud Rate:
4. Hardware Flow Control
(Handshaking):
Describe hardware signaling require-
ments of the interface.
Where a transmitter or receiver is
inhibited until a given control signal
is asserted, it is considered to require
that signal prior to sending or receiv-
ing characters.
Where a signal is asserted prior to
transmitting, that signal will be
maintained active until after the end
of transmission.
Where a signal is asserted to enable
reception, any data sent to the
device when the signal is not active
could be discarded.
5. Interval to Request Link Status:
Indicates how often to send Data
Link Layer status requests on a serial
connection. This parameter is sepa-
rate from the TCP Keep-alive timer.
6. Supports DNP3 Collision
Avoidance:
Indicates whether a device uses
a collision avoidance algorithm.
Collision avoidance may be imple-
mented by a back-off timer with two
parameters that define the back-off
time range or by some other vendor-
specific mechanism.
The recommended back-off time is
specified as being a fixed minimum
delay plus a random delay, where
the random delay has a maximum
value specified. This defines range
of delay times that are randomly dis-
tributed between the minimum
value and the minimum plus the
maximum of the random value.
If a back-off timer is implemented
with only a fixed or only a random
value, select the Back-off time
method and set the parameter that
is not supported to "Fixed at 0 ms".
A - 10
Capabilities

Asynchronous - 8 Data Bits, 1 Start Bit, 1 Stop
Bit, No Parity
ã Other, explain______________________
ã
Fixed at ___________
ã Configurable, range _______ to ________

Configurable, selectable from 2400, 4800,
9600, 19200, 38400, 57600, 115200, 230400
ã Configurable, other, describe_______________

None
RS-232 / V.24 / V.28 Options:
Asserts:
ã RTS before Tx
ã DTR before Tx
ã RTS before Rx
ã DTR before Rx
ã Always RTS
ã Always DTR
Requires before Tx:
 Asserted  Deasserted
CTS
 Asserted  Deasserted
DCD
 Asserted  Deasserted
DSR
 Asserted  Deasserted
RI
 Requires Rx inactive before Tx
Requires before Rx:
 Asserted  Deasserted
CTS
 Asserted  Deasserted
DCD
 Asserted  Deasserted
DSR
 Asserted  Deasserted
RI
Always ignores:
ã CTS
ã DCD
ã DSR
ã RI
ã Other, explain ____________
RS-422 / V.11 Options:
ã Requires Indication before Rx
ã Asserts Control before Tx
ã Other, explain ____________
RS-485 Options:
ã Requires Rx inactive before Tx
ã Other, explain
ã Other, explain ____________
ã Not Supported
ã Fixed at_________ seconds

Configurable, range 1 to 60000 ms
ã Configurable, selectable from ___,___,___
seconds
ã Configurable, other, describe___________

No
ã Yes, using Back-off time = (Min + Random) method
Minimum Back-off time:
ã Fixed at_________ ms
ã Configurable, range _____to _____ ms
ã Configurable, selectable
from____,____,____ ms
ã Configurable, other, describe_____________
Maximum Random Back-off time component:
ã Fixed at_________ ms
ã Configurable, range ____to ____ ms
ã Configurable, selectable
from ____,____,____ ms
ã Configurable, other, describe___________
ã Other, explain______________________
DEVICE PROPERTIES
Current Value If configurable,
list methods
ttyUSB10 Web interface
Web interface
115200 Web interface
0 – disabled Web interface