Pro II: Extension and Interface Modules
Pro II-RS422-4 Rev. E
ADwin
176
ADwin-Pro II
Hardware, manual Dec. 2018
nel, using the controller register. Below the settings are described more
detailed:
Handshake
– Handshake: The interface can be operated in 2 modes:
1. Without handshake
2. Software handshake
Parity
– Parity: In order to recognize an error or incorrect data during the transfer,
a parity bit can be transferred at the same time. The parity can be even
or odd or you can have no parity bit at all.
Data bits
– Data bits: the active data to be transferred may be 5...8 bits long.
Stop bits
– Stop bits: The number of stop bits can be set to 1, 1½ or 2. Here the num-
ber of stop bits depends on the number of data bits:
• 5 data bits: 1 or 1½ stop bits.
• 6…8 data bits: 1 or 2 stop bits.
Baud rate
– Baud rate: The physical data are between 35 Baud and 2.304 MBaud.
The Baud rates are derived from the clock rate of the module; the basic
clock rate has a frequency of 2.304MHz. Based on this fact, every Baud
rate is possible, which can be derived from an integer division of the ba-
sic frequency. The divisor can have values between
1
…
0FFFFh
. The
following table shows some common Baud rates and their divisors.
Fig. 151 – Pro II-RS422-4 Rev. E: Baud rates
Module revisions
Differences between revisions are described below. The revision number is
located on the front panel.
Different revision characters mean different module characteristics and are
documented separately. A counter number is added for internal purpose.
Programming
Programming in ADbasic
The module is comfortably programmed with
ADbasic
instructions. The
instructions are described in
ADbasic
online help and in the Pro II Software
manual.
The include file
ADwinPro_All.inc
contains instructions for the following
functions:
Baud rate
Divisor
Baud rate
Divisor
dec.
hex.
dec.
hex.
2.304.000
1
0001h
19.200
120
0078h
1.152.000
2
0002h
9.600
240
00F0h
460.800
5
0005h
4.800
480
01E0h
230.400
10
000Ah
2.400
960
03C0h
115.200
20
0014h
1.200
1920
0780h
57.600
40
0028h
600
3840
0F00h
38.400
60
003Ch
300
7680
1E00h
Revision
Output
date
Changes to previous revision
E
11/2011
First version
Function
Instructions
Initialization
P2_RS_Init
,
P2_RS_Reset
