Systeme Helmholz SSW7-HMI User manual

SSW7-HMI
Adapter for MPI Bus with HMI Protocol
700-751-9VK21
User Manual
Version: 4 / 20.03.2009
HW 1 / FW 2.02 and later
Order number of manual: 900-751-9VK21/en
Systeme Helmholz GmbH zHannberger Weg 2 zD-91091 Großenseebach
Phone: [phone] zFax: [phone] zE-Mail: [email protected] zInternet: www.helmholz.de

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model or design.
Copyright ©2009 by
Systeme Helmholz GmbH
Hannberger Weg 2, 91091 Grossenseebach, Germany
Note:
We have checked the content of this manual for conformity with the
hardware and software described. Nevertheless, because deviations
cannot be ruled out, we cannot accept any liability for complete
conformity. The information in this manual is regularly updated.
When using purchased products, please heed the latest version of the
manual, which can be viewed in the Internet at www.helmholz.de,
from where it can also be downloaded.
Our customers are important to us. We are always glad to receive
suggestions for improvement and ideas.
Step and SIMATIC are registered trademarks of SIEMENS

Design
The SSW7-HMI permits connection of operator terminals or visualization software
from a serial interface (RS232 level, 4.8 ... 115 Kbaud) with an HMI protocol to an
MPI bus (RS485 level, 187.5Kbaud).
The SSW7-HMI has a 1.2m long connecting
cable, which can be directly plugged into the
CPU connector of the PLC or at any other
point in the MPI network.
A nine-way D-sub connector with a pin
assignment suitable for a standard PC null
modem cable is contained in the housing of
the SSW7-HMI (cable is part of the scope of
supply of the SSW7-HMI).
The SSW7-HMI receives its power supply from
the CPU via the MPI cable. If 24V are not
available at the point of connection or if
several SSW7s are connected to a CPU at the
same time, the 24V power supply can be fed
from an external source.
The 24V connection intended for this purpose (green connector).
The connection to the MPI bus can be extended with an additional cable. For that
purpose, Systeme Helmholz GmbH offers the following products:
SSW7 extension cable, 5m 700-751-6VK11
SSW7 extension cable, 10m 700-751-6VK21
SSW7 extension cable, special length 700-751-6SO11
When extending the MPI bus, please follow the relevant configuring guidelines as
defined in the documentation of your PLC.
The SSW7-HMI and the extension cable do not contain any terminating
resistors.
i
A standard rail bracket (700-751-HSH01) is available for the SSW7-
HMI.
SSW7-HMI Page: 4

Transmission
The SSW7-HMI supports the Siemens HMI protocol PDK Version 2. Data bytes,
marker, input and output bytes, counters, timers, market bits, and dates/times can
be transmitted.
All function codes of the HMI protocol are supported (PDK Version 2).
The following extensions are implemented in the SSW7-HMI:
1. The function set_baudrate (131) also has the baudrates 56Kbaud (code: 0x05) and
115Kbaud (code: 0x06).
2. With the function load_tool (128) it is possible to redirect an existing connection
to a new target address without having to use the function unload_tool (129). The
serial baudrate is retained!
Please note that the SSW7-HMI requires a positive signal (ON) on the
handshake line RTS and DTR! Otherwise it will not start communication on
the MPI bus.
An existing link can be broken completely if the RTS and DTR lines are deactivated.
i
Multiple connections as described in PDK Version 3 documentation are not
implemented in sthe SSW7-HMI at the moment.
Error codes
Please see the Siemens HMI documentation (PDK programming manual edition 2)
for the error codes of the SSW7-HMI.
LED displays
The three LEDs on the top of the device provide you with information about the
operating status of the SSW7-HMI. You can use them to locate sources of error
quickly.
The LEDs have three different states: Off, on, blinking. If the LED is off, none of the
labeled states applies.
Upper LED off: The SSW7-HMI has no power or is faulty
Upper LED on: The SSW7-HMI is being powered with 24V and the processor
is running
Center LED on: The SSW7-HMI registered in the MPI network
Lower LED on: The SSW7-HMI has established a connection
Lower LED blinking: The SSW7-HMI is transmitting data
SSW7-HMI Page: 5

Technical data
Order number SSW7-HMI 700-751-9VK21
Dimensions 105 x 53 x 29 mm (LxWxH)
Weight Approx. 180g (incl. MPI cable & connector)
MPI interface
Type: RS485, electr. isolated
Transmission rate: 19.2 kbit/s or 187.5 kbit/s
Cable: 1.2m, no terminating resistors
Connection: Connector, SUB D 9-way
Communication interface
Type: RS232, serial asynchronous
Transmission rate: 4.800 bit/s to 115 kbit/s
Connection: Connector, SUB D 9-way
Power supply
Voltage: +24V DC ±25%,
from the programmable controller or
external infeed
Current consumption: max. 70 mA
Degree of protection IP 30
Electromagnetic compatibility (EMC)
Interference emission Class B acc. to EN55022
Interference immunity on signal lines±2kV acc. to EN61000-4-4
Interference immunity ESD ±6kV contact discharge EN61000-4-2
±8kV air discharge EN61000-4-2
RF radiation fields 10V/m acc. to EN61000-4-3
Conducted RF interference 10V acc. to EN61000-4-6
Climatic conditions
Temperature during operation -20° C to +60°C
Temp. storage/transport -20° C to +60°C
Relative humidity operation 5% to 85% at 30°C (no condensation)
Relative humidity storage 5% to 93% at 40°C (no condensation)
Special features
Quality assurance Acc. to ISO 9001:2000
Maintenance Maintenance-free (no battery)
SSW7-HMI Page: 6

Pin assignment
Pin SUBD connector PC SUBD connector MPI
1 DCD n.c.
2 Rx M24V
3 Tx DATA.B
4 DTR RTS AS
5 GND 0V (M5V)
6 DSR +5V
7 RTS +24V
8 CTS DATA.A
9 RI RTS PG
Connecting cable
MPI-Extension cable (700-751-6VKx1):
PC to SSW7-HMI (700-751-7VKx1):
SSW7-HMI Page: 7