Handeingabegerät
Handbediengerät mit serieller Schnittstelle
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MR 175 Handheld Pendant, Manual
Communications
Serial Interface Specification
•
RS-485 Full-Duplex Single Drop Point to Point
•
57,400 Baudrate
•
1 Start Bit
•
8 Data Bits
•
1 Stop Bit
Data Exchange Protocol
Although primarily a transmit device, the MR175 is capable of both transmitting and receiving
data. All commands to the MR175 are single character codes and do not require any
termination characters such as LF (Line feed) or CR (carriage return) characters. If additional
characters are sent, they will be ignored.
When the MR175 is powered up, it transmits an identification string “MR175 Version x.xx”, and
then it will start transmitting in Binary mode. One packet is transmitted with the initial states, and
each time the user presses a button or otherwise moves a control necessitating the initiation of
a transmission packet.
Note:
The potentiometer values are internally converted to a binary number
between 0 and 220 counts. A/D reading uncertainties can cause the
transmission string to be transmitted without any user interactions.
