Cervis TM70 Manual de Instalação descarregar pdf (Página 49)

Operation and Installation Manual

2013 Cervis, Inc.

Once the 24 characters are completed, the command for sent the cursor to line 1, column 1

must be written; otherwise, all previously written will be lost. We still have only used four

packages of 8-bytes; therefore, we have another 4-bytes available to send, for example, the

state of the LEDs and the Buzzer.

Switching On the LEDs and Buzzer

To establish the state of the LEDs and the Buzzer, we have to send a 2-data package. This

package must be preceded by the identifier COB_ID=0x200+node_ID.

LEDs  From 0 to 255 value

Buzzer  0 or 1 value

The first data package determines if the LEDs are lit green, red, or amber (green/red combined).

The value is a binary code that reads as follows:

Table 15. First Data Packet: LED State Values

LED 4

LED 3

LED 2

LED 1

Red Green Red Green Red Green Red Green

128 64 32 16 8 4 2 1



Data 0 0 1 1 1 0 0 1 = 57h

The second data packet determines if the buzzer is ON (1) or OFF (0).

Table 16. Second Data Packet: LEDs & Buzzer Determination

Position

Message (Hex)

Meaning

LCD 1

57 LED 1 = Green; LED 2 = Red; LED 3 = Amber; LED 4 = Off

LCD 2

01 Buzzer ON

LCD 3

LCD 4

LCD 5

LCD 6

LCD 7

LCD 8

Important: The last byte of the transmitted second packet could have different values:

• If the value is 1: The CAN message from the master is already sent to the transmitter and

the receiver could receive one more messge and save it to later send to the transmitter.

• If the value is 0: The transmitter has already received a CAN message and is ready to

receive another.

• If the value is 3: The buffer is full and is waiting for confirmation from the transmitter. A

message may be lost if sent while in this state because it has nowhere to be stored.

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 102 103

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Cervis TM70 Manual de Instalação Página 49

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