Concoa 529 5310, Инструкция по установке и эксплуатации, Страница: 9 / 16

-9-
Data Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
Description
LEFT,
SYS1
RIGHT,
SYS1
LEFT,
SYS2
RIGHT,
SYS2
LEFT,
SYS3
RIGHT,
SYS3
LEFT,
SYS4
RIGHT,
SYS4
Communication between the PC and the Remote Alarm will use the RTS and CTS lines to control the flow of
data.
The Serial Port has the capability of transmitting the following data to the PC:
Table 5
Command Code Keystroke Definition
STX Hex 02 Cntrl-B Start of Text
Data Byte Alarm Status
ETX Hex 03 Cntrl-C End of Text
ENQ Hex 05 Cntrl-E Enquire
Table 6
The Data byte is 8 bits in length (start, stop, parity not considered). When the Remote Alarm detects a change
in status from any of the SYSTEM BANK switches, it will send out three bytes to the PC. Each byte is sent
using the handshaking created by linking the RTS and CTS lines between the two devices. The bytes are STX,
data byte
, and
ETX
.
The Serial Port has the capability of receiving data from the PC. The data that it is capable of interpreting is
limited to the following:
Command Code Keystroke Definition
CAN Hex 18 Cntrl-X Cancel
ENQ Hex 05 Cntrl-E Enquire
STX Hex 02 Cntrl-B Start of Text
ETX Hex 03 Cntrl-C End of Text
DC4 Hex 14 Cntrl-T Device Control
4 (Test)
Data Byte
Table 7
CAN Command – The Remote Alarm should interpret this as a Reset. Upon receiving this command, the software
should jump to the beginning or initialization.
ENQ Command – When this is received the Remote Alarm should provide the status of the SYSTEM BANK Switches.
This command coming from the PC has no "STX" or "FTX" associated with it. This is done by transmitting the
STX command first, followed by the data byte, followed by the ETX command. This command can also be sent to
the PC if the PIC does not understand the instruction it received.
DC4 Command – When this is received the Remote Alarm will initiate the self test sequence.
Connection to the Serial Port is made through a 9 pin D-subminiature connector. The cable needed is a standard
serial cable normally used to connect any peripheral serial device to a PC. The pin assignments for the 9 pin D-
subminiature connector on the Alarm are shown in Table 8 and Figure 9.