TM 5-3895-374-24-1
Serial link
Presentation
Incorporated in the ALTIVAR ATV-45 2 Is a point to point serial link operating either via 20 mA current
loop, or RS232C link This function enables connection of the ATV-45 2 to a programmable controller
or a microcomputer with a single link
The data exchanges are programmed according to the very simple protocol, described below and
enable:
- adjustment of speed controller setting parameters,
- control of the speed controller,
- access to all control and signaling data
More sophisticated applications can also be carried out by connecting the ATV-45 2 to a multidrop bus
given the addition of an optional board, which ensures, in addition, control of the industrial protocols
UNI-TELWAYS and MODBUS / J BUS!
Link characteristics
- Asynchronous serial link
- Isolated transmission interfaces 20 mA current loop, RS232C
-Speed 9600 bauds
- Character format 1 start bit,
8 data bits,
1 odd parity bit,
1 stop bit
All these parameters are fixed
- The link Is of the master-slave type, the speed controller being the slave, and operating in half-duplex
(a single station transmits at any given moment)
- Speed controller response time 10 ms < Tr < 50 ms
Connection
-Use of the 20 mA current loop Is strongly recommended In industrial applications In environments
with high levels of interference, or long distances
Use a screened cable with 2 twisted pairs, with conductor cross sections of more than 0,5 mm2,
maximum length = 500 metres
- While isolated from the controller, the RS232C link, because of its electrical characteristics, is much
more sensitive to interference and should not be used over distances longer than ten metres
Transmission interfaces
- These are available on the J4 connector of the ATV-45 2 a SUB D, 9 pin type, female connector,
located In the lower part of the device
- One of these interfaces only should be used for any given application
- There is no links or switches needing to be set to a position
Connector pins
6
REC+
NOTE
2
RX (RS232C)
To use with a current loop,
3
TX (RS232C)
connect terminals 6 and 2
1
REC-
4
Reserved
7
Reserved
8
Reserved
9
EMI+
5
GND (RS232C) et EMI -
(page 3-264)
