27.3 CONVERTER OPERATION
When the converter is operating, all access is via the appropriate protocol interrogation software. The user
should consult the software supplier for information on its operation.
The 9300 communicates with the converter autonomously on power up. The 9300 shares a common port be-
tween the converter and the front RS232 connector. If a PC is connected to the front port the converter will be
disconnected. When the PC is disconnected, the converter will resume its connection with the 9300. However,
if the PC is connected, the variables in the converter will not update since it cannot communicate with the 9300.
A number of settings in the 9300 facilitate some of the features of the converter. These settings are called print
triggers and are used to tell the converter that something of note has taken place in the relay.
27.4 9300 SETUP
The 9300 must be set for 9600 baud, without hardware handshaking in order to communicate with the con-
verter. In the APRIL menu of the 9300 the following parameters must also be enabled when using a protocol
converter.
123 Alarm Trigger
124 Trip Trigger
125 Param Trigger
27.5 CONVERTER ADDRESS SELECTION
In order to connect to a network, unique addresses must be programmed into each converter. Failure to do this
could result in multiple converters responding to a single request, thereby corrupting all responses from that
address. Not only do the addresses need to be unique amongst 9300s, they must also be unique from every
other device on the network.
Modbus - The slave address is always set prior to leaving RFL to 0B hex (11 decimal) and is located at point
number 04A0 Hex. Using the Modbus master software the user must write the desired address value into this
location. Addresses from 1 to FF Hex (1 to 255 decimal) are acceptable.
DNP – The slave address is always set prior to leaving RFL to 5 and is located at location 0000. It is treated as
an object 40, variation 2 variable type. A two byte value from 1 to 65,535 must be written to this location.
27.6 SPECIFICATIONS
Operating Temperature -20 to +55 degrees C
Operating Humidity 90% Relative Humidity non-condensing @ 40 degrees C
RFL 9300 RFL Electronics Inc.
October 20, 2004 27 - 2 (973) 334-3100
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