USB/MPI+
programming cable simulate USB port as traditional
serial port (usually COM3), which enables existing programming software(STEP 7 ) to communicate through simulated traditional
port and PLC devices.Outline configuration:
signals definition of the RS485-Block
(DB9M) of the USB/MPI +
pin
signal
Description
1
NC
No use
2
M24V
24VDC power negative
3
B
RS485 signals positive
4
RTSAS
Data reception control
5
GND
RS485 Signal Ground
6
NC
No use
7
P24V
24VDC power positive
8
A
RS485 signals negative
9
RTS_PG
Data sent control
The status of the indicator
Indicator
Normally on
twinkle
OFF
Power
Power normal
Fault
Fault or Not connected to
power
Active
Online status
Transmission of data
Not online
Tx
Fault
Send data
No data
transmission
Features and technological index:
● Support Windows2000/Windows XP
● Support STEP7 V5.2
and higher
● Fully compatible with USB V1.1 and USB V2.0
● Power supply by both
USB main line and MPI programming port(Total
1W).with
Overcurrent Protection and Surge Protection
● High
optoelectronic isolation voltage up to 1000VDC
● The USB port design with surge protection .The RS485 port design with
overcurrent protection and lightning protection(500W)
● Baud rate of Com port on PC: 19.2Kbps~115.2Kbps
● Baud rate of MPI port on PLC:
19.2Kbps~187.5Kbps
● Support long distance communication up to 1000m
● Working temperature -20~+75'C
● Length 3 meters.Color:black
● One pc supports one USB programming cable only
Usage:
USB device drivers should be installed before
using USB/MPI+ programming cable. After completing Driver installation, the
corresponding COM port for the USB/MPI+ programming cable will be displayed in
the “Device Manager” of Window. The step next is just to choose this COM port in
the programming software and other application software and keep other
communication parameters as in the Default settings. And the following steps are
exactly the same as in the traditional programming cables with RS232 interfaces.
Here are requested to indicate that "USB" option in the local communications
interface setting which the software is not support to the programming
cable.
If the COM port in the programming software with
"*" symbols, such as "* COM3", it’s shown that the COM port have faults. Quit
the software and plug a USB plug or re-install the USB driver.
Please note that Siemens COM port in programming
software is up to support the option to COM8.But the ports more than COM8 are
able to choose but in fact can not be used!
STEP7 software settings:
Enter the main interface of STEP7 programming software (SIMATIC Manager), click
on the "Set PG / PC Interface…" option under "Options" menu into the PG / PC
interface settings.
1, Double-click on "PC Adapter (MPI)" to set the
parameters of COM port and MPI port. The adapter does not support "PC Adapter
(PROFIBUS)" option.
2, Click on "Local Connection" option to set the
parameters of COM port, correct choose the COM port in the equipment manager
after the driver of USB / MPI + USB has been installed, select the 19200 bps or
38400 bps as the baud rate of COM Communication. USB / MPI + will automatically
adapt to the choice of baud rate.
3, Click "MPI" to set the parameters of MPI interface
adapter options, baud rate can be set to 187.5 Kbps, or 19.2 Kbps, USB / MPI +
adapter will automatically adapt to the MPI port of the PLC baud rate. Other
parameters set as default.
4, On-line test can access the points: USB / MPI +
connect the MPI port of the S7-300/400PLC with the computer's USB port. Click on
the main menu interface, as shown in a red circle button. If the data in red box
is shown as the picture, the on-line test has pasted. As so far, the setting has
completely finished. It can do all Operation such as upload, download
,monitoring of the procedures and other operations.
Long-distance communications:
For USB/MPI+, the largest
communication distance is up to 1000m at the communication speed of 187.5Kbps. It
needs to splice 120ohm terminal resistance between 3 and 8 pin on the RS485 port(DB9 Male) to eliminate
signal reflection, and connect 24VDC power between 7 and 2 pin. But requires one PFB-G for each
PLC.
Please Note: USB interface cable cannot be
extended.
The quality is guaranteed.It's tested before shippment.Not made by Siemens,OEM product as the replacement. If
you need other cheap transportation,pls contact us and we will
calculate the freight fee for you according to your requirements. The
item will be delivered within 3-5 working days once payment is received
and cleared.Please pay within 3 days after your order. If you need large quantity(Over USD500),Pls contact us and we will give you the competitive wholesale price. 
