Connection Of An Ascii Terminal; Usart; Test Interface; Coupler Interface - Honeywell XK516D1 Maintenance Manual

5

USART

Modules, D20 and D12, convert the parallel data on the data bus into a serial
data flow, and serial incoming data are transformed into a parallel data word.
Both interfaces operate with a data rate of 9600kbit/s. The data rate is controlled
via timer output 2 of the processor (BAUD). The system uses 7 data bits, 1 stop
bit, and odd parity. The processor clock is supplied to the modules via counter
D21. The counter divides the processor clock output by a factor of 4.
a Test interface
The test interface allows commands to be transferred to the control from a ter-
minal for test purposes. Module D13 (MAX232) is used to convert the TTL sig-
nals of USART module, D20, to V28 level. Signals of the test interface are avail-
able at connector, X5. The connections shown in Fig. 26 are necessary in order
to be able to send commands to the control from an ASCII terminal.
Commands to the control begin in each case with a <LF>, line feed (0AH) and,
end with a <CR> carriage return (0CH). Commands are composed of a com-
mand name and 1 or more parameters. The blank (20H) is used as a punctua-
tion mark between command names and parameters, and between parameters.
<LF><Command name> <Parameter1> . . . <ParameterN><CR>
Replies are also delimited by <LF> and <CR>.
The FK516 Antenna Coupler is controlled by means of serial control commands
from the control unit. For test purposes, access to the serial signals is also pro-
vided at test adapter, X5, with V28 level if jumper, X3, is connected to position
2-3, and jumper, X8, is connected to position 12.
6 Module bus Interface
Setting commands to the HF assemblies are transferred via a parallel bidirec-
tional 16-bit data bus. HF assemblies for their part can transmit fault messages
1I.B.1516A
Honeywell
COMPONENT MAINTENANCE MANUAL
PART NUMBER 964-0452

Connection of an ASCII Terminal

A command overview can be obtained by entering <LF>HELP<CR>.
b Coupler interface
23-12-01
Figure 26
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Mar 30/01