2 ] Control Characters - Denso BHT-100B User Manual

[ 2 ] Control Characters

The control characters are classified into two groups: transmission control characters
and text control characters.
(1) Transmission control characters
The transmission control characters listed below are used to compose transmission
control sequences in phases 1 through 3.
Symbol Value
DLE EOT 1004h
DLE ENQ 1005h
DLE ACK 1006h
DLE NAK 1015h
WACK 103Bh
■
Transparency
The BHT uses the transparent mode which allows the control characters and codes
(e.g., STX, ETX, SOH, and DLE) to be transmitted as normal data in the transmis-
sion texts.
To transmit a DLE as normal data, type DLE DLE per DLE.
Chapter 3. Communications Operations of the BHT-100Q/100B
Meaning
End Of Transmission
Enquiry
Acknowledge
Negative Acknowledge
Wait for Acknowledge
123
Function
Releases a data link (Phase 3).
Requests abort of transmission
(Phase 2).
Requests establishment of a data link
(Phase 1).
Prompts the receiver to respond to
the sent text (Phase 2).
Acknowledgment response to DLE
ENQ (Phase 1).
Acknowledgment response to text
(Phase 2).
Acknowledgment response to DLE
EOT (Phase 3).
Negative acknowledgment response
to DLE ENQ (Phase 1).
Negative acknowledgment response
to text (Phase 2).
Requests suspension of data recep-
tion during erasure of the flash
memory.