Woodward MRM4, Manual, Page: 193 / 460

Communication Protocols
Value Description Default Size Menu path
NoOfInternalError Total Number of Internal
errors while interpreting
the request. 0 0 - 9999999999 [Operation
/Count and RevData
/Modbus]
Profibus
Profibus
Part 1: Configuration of the Devices
Call up »Device parameter/Profibus« and set the following communication parameter:
•
Slave-address, to allow clear identification of the device.
In addition to that the Master has to be provided with the GSD-file. The GSD-file can be taken from the Product-
CD.
Part 2: Hardware Connection
•
For hardware connection to the control system, there is optional an D-SUB interface at the rear side of
the device.
•
Connect bus and device (wiring).
•
Up to 123 slaves can be connected.
•
Terminate the Bus by means of an Terminate Resistor.
Error Handling
Information on physical communication errors, such as:
•
Baud Rate Error
can be obtained from the event recorder or the status display.
Error Handling – Status LED at the rear side
The Profibus D-SUB interface at the rear side of the device is equipped with a status LED.
•
Baud Search -> red flashing;
•
Baud Found -> green flashing;
•
Data Exchange -> green; and
•
No Profibus/Unplugged, not connected -> red.
EN MRM4 01/11 Page 193