Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 97)

Operating Functions
Chapter 5
5–60
The five values PUSHed on the stack before executing the CALL are in the
following order:
Parameter Selections
Number of bits/word
Parity Enable
Number of Stop Bits
Software Handshaking
Hardware Handshaking
5,6,7,8
0=None,2=Even 1=Odd
1=1 Stop Bit, 2=2 Stop Bits, 3=1.5 Stop Bits
0=None, 1=XON–XOF
0=Disable DCD
1=enable DCD
Example: 100 PUSH 8 : REM 8 BITS/WORD
120 PUSH 0 : REM NO PARITY
140 PUSH 1 : REM 1 STOP BIT
160 PUSH 0 : REM NO SOFTWARE HANDSHAKING 160 USH 0 EM S FTWA E HA DSHAKI G
180 PUSH 0 : REM DISABLE DCD
200 CALL 30 : REM SET UP PERIPHERAL PORT
or
Example: 100 PUSH 8,0,1,0,0:CALL 30
Important: Hardware and software handshaking is disabled and both I/O
buffers are cleared on power-up.
This routine displays the current peripheral port configuration on the
terminal. No argument is PUSHed or POPed.
Enter CALL 31 [return] from the command mode.
Example:
CALL 31 [RETURN]
DCD OFF
1 STOP BIT
NO PARITY
8 BITS/CHAR
Important: XON/XOFF status is shown only if enabled.
5.8.1
Peripheral Port Support –
Parameter Set – CALL 30
(continued)
5.8.2
Peripheral Port Support –
Display Peripheral Port
Parameters –CALL 31