Broyce Control Ltd., Pool Street, Wolverhampton, West Midlands WV2 4HN. England
Tel: +44 (0) 1902 773746 Fax: +44 (0) 1902 420639 Email: sales@broycecontrol.com Web: www.broycecontrol.com
The information provided in this literature is believed to be accurate (subject to change without prior notice); however, use of such information shall be entirely at the user’s own risk
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P9680[C]-5-A.DOCX
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MODBUS COMMUNICATION OPTION (Model P9680C)
1.
1.
1.
1.
CONNECTIONS
CONNECTIONS
CONNECTIONS
CONNECTIONS
At the rear of the P9680C, a 3-way terminal/connector is provided allowing for connection to the Modbus system. Only 3 terminals are required, COM
(Common/GND), TX- (or Data -) and TX+ (or Data +).
Connection for Modbus
A typical example of how the P9680C’s may be arranged is as follows:
Address 1 Address 2 Address n
Modbus
Master
The P9680C is provided with a “Modbus termination” switch. It is recommended that for the last unit connected in the system, the switch is set to position “1”. This
ensures there are no communication issues by minimising the reflections from the end of the bus.
2. MODBUS COMMANDS
2. MODBUS COMMANDS
2. MODBUS COMMANDS
2. MODBUS COMMANDS
In summary, utilising the MODBUS features allows for the user to access (and change where relevant) the following:
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Product setup and configuration and define the following:
•
External toroid ratio
•
Select Network frequency
•
Configure Relay 1 and Relay 2 operation
•
Configure Overcurrent settings
•
Configure Earth Fault settings
•
Measurement and Status
•
IL1, IL2, IL3, Io live and tripped readings
•
Trip history
•
Relative time since power up
•
Carry out a product Test or Reset operation
The full MODBUS command set is available in a separate document and available on request.
