Specifications

Page 6-5
1770-805
TABLE 6-2- ASCII Control Codes
CONTROL
CODED
DISPLAY H
ASCII
NAME
CTRLO
Nu
NUL
NULL
CTRLA
SH
SOH
START OF
HEADER
CTRL B
sx
STX
START OF
TEXT
CTRL
C
Ex
ETX
END
OF TEXT
CTRL D
ET
EOT
END OF TRANSMISSION
CTRL E
Eo
ENQ
ENQUIRE
CTRL F
AK
ACK
ACKNOWLEDGE
CTRLG
BL
BEL
BELL
CTRL H
ss
BS
BACKSPACE
CTRLI HT
HT
HORIZONTAL TAB
CTRL J
LF
LF
LINE FEED
CTRL K
VT
VT
VERTICAL TAB
CTRL L
FF
FF
FORM FEED
CTRL M
CR
CR
CARRIAGE RETURN
CTRL N
so
so
SHIFT OUT
CTRL 0
sl
Sl
SHIFT
IN
CTRL P
OL
OLE
DATA LINK ESCAPE
CTRL Q
o,
DC1
DEVICE CONTROL 1
CTRL R
02
DC2
DEVICE CONTROL 2
CTRLS 03
DC3
DEVICE CONTROL 3
CTRL T
04
DC4 DEVICE CONTROL 4
CTRL U
NK
NAK
NEGATIVE ACKNOWLEDGE
CTRLV sv
SYN
SYNCHRONOUS IDLE
CTRLW EB
ETB
END
OF TRANSMISSION BLOCK
CTRLX
eN
CAN
CANCEL
CTRL
Y EM
EM
END OF MEDIUM
CTRLZ
SB
SUB SUBSTITUTE
ESCAPE
Ec
ESC ESCAPE
CTRL, Fs
FS
FILE SEPARATOR
CTRL- Gs
GS
GROUP SEPARATOR
CTRL. Rs
RS RECORD SEPARATOR
CTRL/ us
us
UNIT SEPARATOR
DELETE ~ DEL DELETE
OR
RUBOUT
Q Some ASCII control codes are generated using non standard keystrokes.
fJ Will be displayed when Control Code Display option is set ON.
~ 1770-T3 systems display_ when [RUB OUT] is pressed. Other systems displayt when [DELETE] or
[RUB OUT] is pressed.
6.2.3 GRAPHICS
In the Alphanumeric Mode the Industrial Ter-
minal has the capability of displaying graphic
(line drawing) characters. The Alphanumeric/
Graphics Keytop Overlay (Cat. No. 1770-
KAB) or the PLC-3 Graphics Keytop Overlay
(Cat. No. 1770-KDB) shows the graphic charac-
ters generated by specific keys (Figure 6-1).
The Graphics ON command is the character
sequence CONTROL PSG. When the Graphics
ON command is generated, all subsequent
alpha characters will be displayed as its
graphic equivalent. The Graphics OFF com-
mand must be generated in order to display
alpha characters as alpha characters.
Figure 6-3 illustrates a typical graphic display
that can be "drawn" on the Industrial Terminal.
6.2.4 Special Control Codes
There are several control codes unique to the
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