User`s manual

329

CHAPTER 13 COMMUNICATING WITH ASCII CODE (ASCII-BIN CONVERSION)

13.5 Performing ASCII-BIN Conversion for Data Communicated via the Bidirectional Protocol

13.5 Performing ASCII-BIN Conversion for Data

Communicated via the Bidirectional Protocol

This section explains the ASCII-BIN conversion of data to be communicated using the bidirectional protocol.

(1) The following shows the range of transmission/reception data for which ASCII-

BIN conversion can be performed.

When sending or receiving data, the Q series C24 processes data as follows:

(a) Range of ASCII-BIN conversion

The Q series C24 performs the ASCII-BIN conversion for any data section (data length and data section) and

error code in a message.

(b) Conversion of data length

• At transmission: The Q series C24 converts a transmission data count to 4-digit ASCII code data

(hexadecimal), then sends it beginning with the lowest byte (L).

• At reception: The Q series C24 converts a received data length (4-digit ASCII code data (hexadecimal)) to

2-byte binary code data and stores it in the reception data count storage area.

• At transmission: The Q series C24 converts transmission data for one address to 4-digit ASCII code data

(hexadecimal), then sends it beginning with the lowest byte (L).

• At reception: The Q series C24 converts each two characters of a received data section (2-digit ASCII

code data (hexadecimal)) to 1-byte binary code data and stores it in the reception data storage area.

(Arbitrary data section)

Data section

Data

length

Sum check

code

Applicable data range at transmission/reception

Error code

Applicable data range at transmission/reception

Message at data transmission/

reception

Response message