VDO Cyclecomputing C2 Spezifikationen PDF herunterladen (Seite 69)

C2-6104A OPERATION MANUAL

9 SERIAL PORT

9.1 Connection

Your unit is fitted with a standard ‘D9’ plug or socket allowing it to be controlled from

a computer or other type of terminal or console with a similar interface. Most

computers fitted with an RS232 port, known as a ‘COM’ port, will have a ‘D9’ plug

on them. To enable connection between the two devices you will require one of two

cables as shown below:

D9 connector type

on C2 unit

RS232 cable type required

for linking to PC

Plug – common on earlier C2 units ‘Null-modem’ D9 socket to socket

Socket – common on recent C2 units D9 plug to socket

Should your PC not have an RS232/COM port, it is possible to add an interface

card into the PC to add this facility. Another option you could use is a USB to

RS232 converter. Both methods will add a COM port to your PC, although you

should be aware that these generally do not default to being ‘COM1’ which is the

default most RS232 applications will use.

Some units are also RS-422/485 capable – see the Specifications section for more

details.

The default baud rate is 57600 with 8 data bits, 1 stop bit and no parity. This baud

rate can be changed in the System menu to suit other programs if need be.

9.2 Communications protocol

The standard communications protocol for your unit is text-based and is detailed on

our website. Also on our website, you can find the Windows Control Panel or

CORIO®tool Suite for your unit.

The protocol is also bi-directional (unit and computer both send messages to each

other), so that you can send changes to the unit, and it will also respond with any

changes made via alternate methods (front panel buttons, menu changes and infra-

red control). This enables any attached computer to be aware of any changes

made to the unit from an alternative source rather than itself.

What this means is that you can easily find out the exact command to send to the

unit to tell it to perform a certain function. This can be seen by the data that is sent

back to the computer when changing values on the unit. For instance, just by

turning FREEZE on, by pressing the FREEZE button, will cause RS232 data to be

sent to the computer that represents the command required to set FREEZE on. A

second press, to turn FREEZE off, then sends the computer the command required

to turn the FREEZE off.

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