4. Board design
4
Edition 04.97
Siemens AG Dk-No. 247463
SIMADYN D Hardware User Manual
PROFIBUS interface operation is indicated by an LED on the interface module. It is used for fault finding and
commissioning, and is not externally visible in normal operation when the module is inserted. It has the
following function:
LED:
Function:
H1
bright:
dark:
PROFIBUS interface operation
PROFIBUS interface not operational
There is an 80-pin test connector X20 on the board for hardware diagnostics using a logic analyzer.
Correct hardware functioning is monitored using a "watchdog ".
4. Board design
The board has the following hardware components.
•
80C186 processor ( 20 MHz )
•
EPROM ( 256 kbyte ) with firmware
•
Local processor RAM ( 256 kbyte )
•
Parallel interface to the support board
•
RS485 serial interface
•
Watchdog for NMI monitoring
•
LED for the operating display of the PROFIBUS interface
•
Diagnostics connector for the logic analyzer
•
Diagnostics functionality using the hexadecimal monitor
5. Serial interfaces
5.1. SINEC L2 DP
The connection is either realized via the SINEC L2 bus terminal or the SINEC L2 bus connector at the 9-pin
Sub D socket connector X5. When using the RS485 bus terminal, the cable capacitance must be taken into
account, dependent on the baud rate. Both the bus terminal as well as the bus connector have a terminating
resistor which can be switched-in.
Please refer to the „SINEC Industrial Communications Catalog IK10 1996“ for information regarding SINEC L2
DP as well as the components required to configure a bus system.
5.2. Monitor interface
A hexadecimal monitor runs in parallel on the SS52 in the background. Parameter data of the PROFIBUS are
loaded using the hexadecimal monitor. When a fault/error condition develops, diagnostics is possible via the
hexadecimal monitor so that they can be quickly localized and removed. For space reasons, this interface is
located at the same connector as for the PROFIBUS interface.
The monitor interface is an RS232 interface and cannot be modified.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
