User`s manual

Western Reserve Controls, Inc. 1782-JDC User’s Manual

all of the consecutive bytes up to and including the delimiter after the transmit record

number has changed. If the length is non-zero, the JDC will send up to the number of

bytes specified by the length without regard to the transmit delimiter and ignoring

any “junk” characters after the specified amount of bytes. The format is:

Table 2-4 DeviceNet Consume Assembly / Transmit Data String

BYTE MEANING

Byte 1 Record Counter

Byte 2 String Length (number of data bytes)

Byte 3 ASCII Character 1

Byte 4 ASCII Character 2

….

Byte 21 ASCII Character 19

….

Byte 126 ASCII Character 124

3. Begin scanning the JDC. Enter data that you want to send on the serial link. On receipt of

a change to the record number, the JDC will transmit the data. If any data is in the

receive buffer, the received data will be returned as a poll response. (If the sequence

number is the same as the previous response, the JDC will not re-send the string.)

NOTE: If using the Byte-Swap Mode (Parameter 10 set to enabled) all strings being sent must

have the length set. Using a zero length will prevent the byte swapping from occurring.