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RS485 Interface
capaNCDT 61x4
5.
RS485 Interface
The DT6124 series controllers have an RS485 interface.
You can read out the measurements in digital form via the RS485 interface.
MICRO-EPSILON can help you with the MEDAQLib driver, which contains all commands for the capaNCDT 6120. You can download
the link directly via the following link:http://www.micro-epsilon.de/link/software/medaqlib .
You can also use the IF1032/ETH interface converter, see
, for configuration and for reading out the measurements via Ether-
net.
5.1
Hardware Interface
The interface is a half-duplex RS485 interface (1 common line pair for Rx and Tx).
Baud rate:
230400 (other baud rates can be set)
Data format:
1 start bit, 8 data bits, 1 parity bit (even), 1 stop bit
RS485 address: 126 (can be set between 1 and 126)
There is no RS485 terminating resistor in the controller. In RS485 lines longer than 5 meters, a 120 Ohm terminating resistor is re-
quired between the A and B line at both the bus start and end.
5.2
Protocol
The capaNCDT 6120 acts like an RS485 slave. As it is a half-duplex protocol, only the master can initiate a communication. Each
device on the RS485 bus requires its own RS485 address. The master sends a request with an address to the bus, and only the slave
with this address can answer the request.
