IMET M880 Series, User Manual, Page: 31 / 56

M880 ALL EN 2.7.2.docx 31/56
7.22. Serial data transmission (PCB262)
The radio remote control is preset for optional serial data transmission and acquisition. The connection
between the radio remote control and the user’s equipment is done with a 15m long serial cable (for
standard RS232) and a Baud Rate of (9600 sps). For lengths over 15m, move on to standard RS485.
7.23. User serial (RS232/RS485)
This connection is used in customized applications to receive data from an external device and to
send data to the transmitter’s display.
The following messages can be sent:

Messages stored in the application’s memory
The messages must be sent to the RS232 connection in data packets following the serial protocol
shown below. The application must send to the data feedback card the single characters that make up
the message to be shown on the display of the transmitting unit.

Messages stored in the data feedback card’s memory
In this case the application sends an N code to the data feedback card regarding the message (N) to
be sent and shown on the display of the transmitting unit.
0x02 POS
N
0x0d
Ordine di invio
XOR
BYTE Description
0x02 A variable indicating the start of the message.
POS Position of the message’s starting point on the display
N Number of the message stored in the card data feedback card.
0x0d A variable indicating the end of the message. The variable is a hexadecimal value
different from any ASCII character that can be shown on the display.
XOR
XOR of all the preceding bytes starting from 0x01 (parity check).
7.24. Serial connection cable
0x01 POS
ch
0
ch
N-1
0x0d
Ordine di invio
XOR
BYTE Description
0x01 A variable indicating the start of the message.
POS Position of the message’s starting point on the display.
Ch
0
…Ch
N-1
Generic i th character sent to the display (text of message).
0x0d A variable indicating the end of the message. The variable is a hexadecimal value,
different from any ASCII character that can be shown on the display.
XOR XOR of all the preceding bytes starting from 0x01 (parity check).
Max
30m