31
First of all the
CLS
drops and after 5 ms
10 clock pulses are sent; the data packet
is then sent and then there is a pause of
5ms before pulling up the
CLS
.
The period (Tp) has a duration of 1ms and is formed as follows:
400μs
in which the
RDP
(data) and
RCP
(clock) lines are high
300μs
in which the
RDP
is low if the bit is equal to 1 (
RCP
is always high)
300μs
(Tck) in which the
RCP
is low (
RDP
maintains the level it had before)
At the end of the period
RCP
and
RDP
are once again high.
Tck = 300μs - Td = 600μs - Tp = 1ms
7. SERIAL protocol (bit flow sequence)
The serial protocol sends an
RS232
standard protocol packet to
the
DATA0
output (baudrate = 9600, without parity, 8 bits and
one stop bit) in the following format:
00C000B
1
B
2
B
3
B
4
B
5
0
where 0 is the ASCII character "
0
" (30h),
B
1
B
2
B
3
B
4
B
5
are the
5 least significant bits of the hexadecimal code and "
C
" is
the transmitted channel according to the
character table:
The
D1
output is activated 200 ms before the
packet is sent to
D0
in the following way:
8. Code truncation
If you choose the
WIEGAND
protocol 1,2,3,6,7 and 9 it is possible that the
RCQ504/508W00
transmitter code exceeds the maximum code length that can
be represented by the available bits. In this case the interface eliminates the most
significant bits which cannot be represented by the chosen
WIEGAND
format.
1
0
1
RCP
T
ck
T
d
RDP
T
p
D1
200ms
D0
e.g. 1:
If you choose the 26 bit
WIEGAND
protocol with site code (limit
65’535
) and the
transmitter code is
356’890
, the truncation function will cancel the first bit and the code
effectively sent in
WIEGAND
output will now be
56’980
(A number less than
65’535
).
e.g. 2:
If you choose the 37 bit BCD
WIEGAND
protocol with site code (limit
542’287
) and
the transmitter code is
18’436’500
, the truncation function will return the code
436’500
.
It is possible that two transmitters (even though they have different codes) send an identical
sequence of bits to the interface output, e.g. in the case of the
WIEGAND
26 bit protocol with
site code the codes
138’612
and
238’612
will activate the same output bit sequence
38’612
.
9. Setting up additional functions
To set up additional functions proceed as follows:
- switch off the interface;
- set the dips following the table;
- press and hold down
P2
;
- switch on the interface which will sound
two long
beeps
.
The parameters have been set.
"CONFIRMATION" function:
ON:
The interface will only output the received S500 codes if they have been memorised
previously.
OFF:
The interface will only output the received S500 codes directly.
The received DKS codes are output directly, ignoring the confirmation function in uscita.
"DEAD MAN" function:
OFF:
The interface will output the received S500 radio codes and/or DKS codes only once.
ON:
The interface will output the received S500 radio codes and/or DKS codes periodically
while the input signal is maintained.
CH
CHAR
A
1 (31h)
B
2 (32h)
C
4 (34h)
D
8 (38h)
Additional functions
DIP
OFF
ON
#1 Confirmation ON Confirmation OFF
#2
Dead man OFF
Dead man ON
#3
Buzzer ON
Buzzer OFF
#4
-
-
Summary of Contents for S504 Series
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