To a COM port, e.g. COM2
RS232 cable
G.R.A.S. SOUND & VIBRATION
Power Module Type 12AQ
Page 12
4
Remote Control via RS-232 Interface
4 .1 Introduction
Commands and responses, comprising ASCII characters, can be sent to and from the Type
12AQ via its RS-232 interface, using a suitable utility program (e.g. HyperTerminal * as illus-
trated in the following).
4 .2 Interface
Connector: RS-232 9-pin D-sub using the RS 232 cable AA2005
RS-232: 19200,8,n,1
(i.e. 19200 bits per second, 8 data bits, no parity bit, 1 stop bit)
There is no flow control/handshaking; therefore commands must be sent one by one, waiting for
each response.
The setup of the Type 12AQ cannot be requested.
The input buffer is 32 bytes, in case of overflow, a response “Buffer overflow” will be submitted.
This will not happen under normal conditions.
Fig. 4.1 shows how the Type 12AQ should be connected to the computer and Figs. 4.2 and
4.3 show the relevant dialogue boxes (of HyperTerminal) for selecting the COM port in use and
entering the required settings, i.e. 19200,8,n,1 as mentioned above.
Note: The RS-232 connection must always be made with the Type 12AQ disconnected from the
mains
* Developed for Microsoft
®
by Hilgraeve Inc.
Fig. 4.1 Type 12AQ connection to computer
